"Determination Of The Concentration Of Vitamin C By Using The Dcpip Test" Essays and Research Papers

Determination Of The Concentration Of Vitamin C By Using The Dcpip Test

Determination of the concentration of vitamin C in fruits/vegetables by using the DCPIP test (2008) Principle : Vitamin C is a strong reducing agent. It can decolorize the blue dye DCPIP. The amount of vitamin C in a food sample can be estimated by the amount of it that is used to decolorize a fixed amount of DCPIP. Apparatus : Test tube, clean and dry Test tube rack 5 ml syringe or a good quality squeezing pipette 1 ml pipette ...

Citrus, Fruit, Juice 464  Words | 3  Pages

Open Document

Vitamin C

amount of vitamin C in fruit juices affects its freshness and till what extent is the information provided on the pack by manufacturers is reliable? Background Information: Hypothesis: -fresh juices have more vitamin C than long-life -juice that is ‘not from concentrate’ is best in terms of vitamin content -if heat destroys vitamin C then heat-treated long-life juices will have lower concentrations -if heat destroys vitamin C then boiled fruit juice will have lower concentrations than unboiled...

Acid, Apple, Ascorbic acid 659  Words | 3  Pages

Open Document

To compare the concentration of vitamin C in different brands of orange juice.

Practical Task: To compare the concentration of vitamin C in different brands of orange juice. Juice sample provided: 0.1% vitamin C solution, fresh orange juice, You C 1000 orange water. Aim of investigation: To compare and verify the amount of vitamin C in Mr. Juicy and You C 1000 orange juice. Introduction: Problem: To compare the concentration of vitamin C Hypothesis: Concentration of vitamin C in Mr. Juicy is about 0.02 % Concentration of vitamin C in You C 1000 orange water is about...

Ascorbic acid, Color, Concentration 582  Words | 3  Pages

Open Document


Is High Vitamin C all it claims to be? These days, there is much concern on our consumption of food drink, we're told we do not intake the required daily level of fruit and veg, many manufactures claim to provide excellent levels of nutrients, This experiment will be carried out to see whether the vitamin c levels claimed by manufacturers are actually present in the drinks, this will be done by experimenting various drinks using blue DCPIP solution. The quantity of vitamin C in food and drink...

Experiment, Juice, Nectar 410  Words | 3  Pages

Open Document

Determination of Vitamin C content in beverages by Calorimetric Method

3: The Determination of Vitamin C in beverages by Colorimetric Method Name: Wong Chun Hong Matric no.: A0123932L Introduction Vitamin C, also known as ascorbic acid, is one of the essential nutrients the human body requires for it to function. There are many benefits of Vitamin C like the protection against immune system deficiencies, cardiovascular diseases, eye diseases and even skin wrinkling. It comes to no surprise how there is a huge emphasis on Vitamin C intake in people. Vitamin C is normally...

Ascorbic acid, Dehydroascorbic acid, Food 1429  Words | 3  Pages

Open Document

Vitamin C

differences of percentage of vitamin C (ascorbic acid ) between the fresh orange juice and artificial orange juice (Sunkist). Problem statement : Does have different types of fruit juice contain similar amount of vitamin c ? Objevtive: To analyse the concentration and percentage of different food sample by using titration method and state whether the percentage and concentration of vitamin C. Methodology: Theory : DCPIP can also be used as an indicator for Vitamin C. If vitamin C, which is a good reducing...

Ascorbic acid, Citrus, Grapefruit 1434  Words | 5  Pages

Open Document

Investigating Vitamin C

Investigating Vitamin C Background Vitamin C is found in green vegetables, fruits, and potatoes. It is essential for a healthy diet. The chemical name for vitamin C is ascorbic acid. Ascorbic acid is a good reducing agent and therefore it is easily oxidised. Methods for the detection of vitamin C involve titrating it against a solution of an oxidising agent. Where to start There are several oxidising agents that can be used and a commonly used one is 2,6-dichlorophenol-indophenol or DCPIP. You need...

Ascorbic acid, Chlorine, Oxidizing agent 561  Words | 3  Pages

Open Document

Dcpip Testr

lemon fruit or orange fruit contain more vitamin C. Section B. Identifying variables 1. Independent variable Numbers of dropper of juice Time for the juice the decolorized 2. Dependent variable The concentration of DCPIP solution 3. Controlled variable The concentration of DCPIP solution The amount of fruit juice The temperature The time that the juice expose to the air Section C. Introduction 1. Background information DCPIP is an enzyme-catalyzed oxidation electron...

Citrus, Filter paper, Fruit 935  Words | 4  Pages

Open Document

Vitamin C in Different Fruit Juice

Activity 1.21- Is high Vitamin C all it claims to be? Purpose: * To investigate the vitamin C content of fruit juice * To investigate which type of fruit juice provides the most vitamin C The quantity of vitamin C in food and drink can be determined using a simple colour test. Vitamin C decolourises the blue dye DCPIP (dichlorophenolindolphenol). Vitamin C is an antioxidant and reduces the DCPIP. DCPIP changes from blue to colourless (or slightly pink) as it becomes reduced. We will...

Fruit, Juice, Nectar 934  Words | 4  Pages

Open Document

An Investigation to Find Out the Answer of How Would the Cooking Affect the Vitamin C Content of the Vegetable

* Hypothesis The vitamin C content will be fewer in the cooked green pepper than the one hasn't * Objective To investigate the effect of heating on the vitamin C content of green pepper. * Background (copy from the task sheet)and Biological principle * All fruits and vegetables contain a certain amount of vitamin C; also called ascorbic acid is a water-soluble vitamin that is necessary for normal growth and development. * the cooking process of green pepper will decrease the concentration...

Boiling, Distillation, Mortar and pestle 763  Words | 3  Pages

Open Document

Acid Determination of Vitamin C

Acid Determination of Vitamin C Tablets and Salt Solutions Chem 1290-016 03-05-2010 ------------------------------------------------- Purpose: The purpose of this lab was to use acid-base titrations to find the mass percent of ascorbic acid in a Vitamin C tablet. A known concentration of sodium hydroxide was used and the value found was compared to the stated amount of ascorbic acid listed on the vitamin container. Also in this lab the acidity of different salt solutions were tested using...

Acid, Ammonia, Base 1241  Words | 5  Pages

Open Document

Biology Vitamin C

Investigating the vitamin C content of fruits and fruit juice Aim: In this investigation, I aim to measure and compare whether there is a higher content of vitamin C in a fruit or a juice by measuring the volume of the sample required to decolourise a solution of dichlorophenolindophenol (DCPIP). Introduction: For this experiment, I aim to investigate and compare the content of vitamin C in the fruit against the fruit juice. The theory of this method is a titration with dichlorophenolindophenol...

Antioxidant, Ascorbic acid, Citrus 2041  Words | 6  Pages

Open Document

Vitamin C

Vitamin C –A Natural Antioxidant Concept: Vitamin C (ascorbic acid) is an antioxidant. The amount of vitamin C content in food can be found out by titrating with an oxidising agent, e.g. iodine. In the reaction, vitamin C is oxidised, while iodine is reduced to iodide ions. The endpoint is determined by the formation of blue-black starch-iodine complex when all vitamin C is oxidised and excess iodine is free to react with the starch solution added as indicator. Introduction Vitamin C is an...

Fruit, Iodide, Iodine 1052  Words | 4  Pages

Open Document

Cooking in Vitamin C Content

Sample: Microwave DCPIP 0.05% used mass of the green peppers (samples): 13.78g Titration 1 Titration 2 Titration 3 average 3.3 (cm3) 3.4(cm3) 3.2(cm3) 3.3(cm3) Sample: steamed DCPIP 0.005% used mass of the green peppers (samples): 12.41g Titration 1 Titration 2 Titration 3 average 11.6(cm3) 11.7(cm3) 11.6(cm3) 11.63(cm3) Sample: boiled DCPIP 0.005% used Mass of the green peppers (samples): 14.30g Titration 1 Titration 2 Titration 3 average 3.6(cm3) 3.8(cm3) 3.8(cm3) 3.73(cm3) ...

Antioxidant, Ascorbic acid, Dehydroascorbic acid 765  Words | 3  Pages

Open Document

Analysis of Vitamin C - Abstract

Abstract Vitamin C, also known as ascorbic acid, is a water soluble vitamin that is regarded as one of the safest and most effective nutrients. Vitamin C can be found in most fruits and vegetables. The goal of the experiment is to find out the concentration of vitamin C in three citrus fruits, orange, lemon and lime, and to compare them and find out which fruit contains the highest concentration of Vitamin C. By using the juice from each fruit to make a solution to combine with 10cm³ of DCPIP until...

Citrus, Grapefruit, Lemon 938  Words | 3  Pages

Open Document

the vitamin content of fruit juice

THE VITAMIN C CONTENT OF FRUIT JUICE Aim: To investigate the vitamin C content of fruit juice.Hypothesis: I believe the more drops of fruit juice taken to decolourise DCPIP, the smaller the amount of vitamin C in that fruit juice. This is because DCPIP needed to be decolourised by ascorbic acid in fruit juice, so less concentration of ascorbic acids means that more ascorbic acids is needed to decolourised DCPIP. I believe that freshly squeezed orange is going to have the most Vitamin C content...

Ascorbic acid, Citrus, Juice 1864  Words | 4  Pages

Open Document

Quantitative Determination of Protein concentration using the biuret test

Winny Stephanie Experiment 1: Quantitative Determination of Protein Concentration Using the Biuret Test Table 1: Experimental protocol for construction of the protein standard curve Tube 1 2 3 4 5 6 Buffer (ml) 1.0 0.8 0.6 0.4 0.2 0.0 BSA Protein solution (10 mg ml-1) (ml) 0.0 0.2 0.4 0.6 0.8 1.0 Biuret reagent (ml) 4.0 4.0 4.0 4.0 4.0 4.0 Total Volume (ml) 5.0 5.0 5.0 5.0 5.0 5.0 Final protein concentration (mg ml-1) 0 2 4 6 8 10 Absorbance 0.000 0.092 0.163 0.272 0.363 0.474 Table...

Biuret, Biuret test, Chemistry 639  Words | 3  Pages

Open Document

Effects Of Temperature On Vitamin C In Fruit Juices

EXPERIMENT TO STUDY THE EFFECT OF A FACTOR AFFECTING VITAMIN C IN FRUIT JUICES WHAT IS THE EFFECT OF TEMPERATURE ON VITAMIN C IN FRUIT JUICES? The purpose of this experiment is to determine if the difference in temperature will damage vitamin C in any type of fruit juices. Five different temperatures of fruit juices will be used(5, 22, 50, 70, 90) degree Celsius to see how temperature affects the loss of vitamin C in fruit juices. The amount of vitamin C in the fruit juices will then be recorded to see...

Ascorbic acid, Celsius, Juice 557  Words | 2  Pages

Open Document

determination of vitamin c content of tablet

 DETERMINATION OF VITAMIN C CONTENT IN COMMERCIAL (CENOVIS) TABLET ABSTRACT In this experiment, the vitamin C content of a commercial tablet is determined and compared with the manufacturers’ specification. Vitamin C is water-soluble and is an enantiomer of ascorbic acid. (Commercial vitamin C is often a mixture of ascorbic acid and other ascorbates.) Ascorbic acid, C6H8O6, is a reducing agent that reacts rapidly with iodine (I2). As the iodine is added during the titration, the ascorbic acid...

Acid, Antioxidant, Ascorbic acid 1473  Words | 7  Pages

Open Document


experiment 1 Analysis of Commercial Vitamin C Tablets Objective To employ titration technique to determine the content of vitamin C in commercial tablets using volumetric analysis and compare it with the manufacturers' specifications. Introduction Deficiency of essential antioxidant Vitamin C in human will lead to scurvy. In this experiment, the vitamin C content of commercial tablets is determined and then compared with the manufacturers' specifications. Vitamin C, ascorbic acid C6H8O6, reacts...

Ascorbic acid, Burette, Iodine 1420  Words | 7  Pages

Open Document

Spectrophotometric Determination of Ascorbic Acid Concentration in an Unknown Solution

Spectrophotometric determination of Ascorbic acid Concentration in an Unknown Solution Introduction: The naturally occurring organic compound with antioxidant properties is Ascorbic acid shortly referred as (AA). Normally the color of Ascorbic acid is white, but in some cases of impure samples it appears yellow in color. Ascorbic acid is solid in state. In water it dissolves well to give mildly acidic solutions. Ascorbic acid is one form ("vitamer") of vitamin C [1]. So, Ascorbic Acid (AA)...

Acid, Antioxidant, Ascorbic acid 1295  Words | 7  Pages

Open Document

Vitamin C Lab

the Vitamin C from a rival company and compare with that of my company and find out the best value for the money spent by the consumer. Controlled Variable * Mass of the tablet and hereby vitamin C in rival company tablets * Consistency of components in the Vitamin C tablet * Concentration of NaOH Apparatus 1. Burette (50ml) 2. Conical flask (50ml) 3. Vitamin C tablet (1 tablet per one trial) 4. Sodium Hydroxide (NaOH) (500cm3) a. The NaOH concentration in...

Amount of substance, Ascorbic acid, Mole 1739  Words | 6  Pages

Open Document

Vitamin C

Does the amount of Vitamin C on the label of commercially available tablet exaggerate the amount of Vitamin C? The aim of this experiment is to determine whether manufacturers of commercially available Vitamin c tablets exaggerate the amount of vitamin C Abstract: The purpose of this experiment was to test Vitamin C in commercially available Vitamin C tablets. It was discovered that the percentage Vitamin C content was lower than what was stated on the label. This, however, could be due to...

Ascorbic acid, Base, Burette 971  Words | 5  Pages

Open Document

Vitamin c investigation Chemistry

Vitamin C Molecule Investigation Thomas Philpott Introduction Vitamin C (ascorbic acid) is an essential component of human nutrition, as it is an antioxidant that the body requires. Having a deficiency in Vitamin C can lead to scurvy, a disease characterized by abnormalities in human bones and teeth. Fruits and vegetables are common sources of Vitamin C, notably oranges and citrus fruits. Cooking and the application of heat destroy the vitamin so such fruits must be raw in order to obtain the...

Acid, Ascorbic acid, Iodide 1747  Words | 7  Pages

Open Document

Vitamin C

CHEMISTRY 221 LABORATORY�QUANTITATIVE ANALYSIS EXPERIMENT:  DETERMINATION OF ASCORBIC ACID IN VITAMIN C TABLETS THEORY: Ascorbic acid, C6H8O6, MM =  176.13, can be oxidized to form dehydroascorbic acid by bromine via the following reaction: The bromine or iodine used in the titration is generated by adding an excess amount of KBr or KI to an acidified solution of the sample according to the following reaction:   BrO3-  +   5 Br-   +   6 H+    3 Br2  +   3 H2O IO3-  +   5 I-   +   6 H+   ...

Acid, Ascorbic acid, Bromine 1193  Words | 4  Pages

Open Document

Vitamin c content in vegetables

Objective : To identify the component of the solution in its pure form with various food tests and state the justifications. Apparatus : Test-tube , test-tube holder , water bath 95’c , measuring cylinder , white tile , test-tube rack . Materials : Glucose, sucrose , fructose , hydrochloric acid , potassium hydroxide , albumin , cooked starch , corn oil , copper (ll) sulphate solution , ascorbic acid solution , DCPIP solution , Millon’s reagent , Sudan lll , tap water, ethanol , iodine solution , Benedict’s...

Carbohydrate, Disaccharide, Fructose 365  Words | 9  Pages

Open Document

Titration of vitamin c

Determination of Vitamin C by an Iodometric Titration Purpose: The goal of this lab is to determine the concentration of vitamin C in juices and Real Lemon. A redox titration, involving an iodometric method, will be used to do the analysis. The samples will be classified by their Vitamin C content. Introduction: Although most mammals can synthesize vitamin C, or ascorbic acid (C6H8O6), from sugars, man must ingest considerable quantities of this substance. The National Academy of Sciences recommends...

Ascorbic acid, Carbon dioxide, Iodide 545  Words | 3  Pages

Open Document

Vitamin C

person needs a daily intake of Vitamin C to stay healthy; therefore, one should be aware of what fruits he/she should ingest daily or more days to obtain stronger stamina and the abundance of antioxidants in the body to reverse oxidation. Vitamin C or L-ascorbic acid is essential for normal growth of humans and it helps in the repair and reconstruction of body tissues lost over time. It is an antioxidant that blocks the damage caused by free radicals. People who take Vitamin C daily tend to build up a...

Antioxidant, Ascorbic acid, Atherosclerosis 744  Words | 3  Pages

Open Document

Vitamin C Lab Report

11thsci.stream ------------------------------------------------------------------------------------------------------------- Title of experiment The determination of vitamin C. Aim(s) of the experiment (objectives) To determine the concentration of vitamin C in different kinds of juices. Hypothesis Freshly squeezed juice will have the most vitamin C compared to the other types of juices and drinks, because the fruit is picked fresh, and it is not stored, preserved or exposed to oxygen. Chemicals...

Ascorbic acid, Citrus, Grapefruit 1119  Words | 4  Pages

Open Document

Compare by Means of Investigation the Vitamin C of a Number of Commercial and Fresh Fruit Juices

investigation the vitamin C of a number of commercial and fresh fruit juices Measure the vitamin C content of a sample of fruit juice by measuring the volume of the sample required todecolourise a solution of DCPIP. Calibrate the results by comparison with a known concentration of vitamin C. ________________________________________ Demonstrate the effect of vitamin C on DCPIP. Get students to test 2 or 3 of the juices you provide to practise the technique. Ask students to develop a hypothesis to test, and...

Juice, Laboratory glassware, Nectar 621  Words | 2  Pages

Open Document

Effect of temperature on Vitamin C content

Temperature on Content of Vitamin C Introduction A daily intake of Vitamin C is essential for humans. Without it, the disease scurvy develops as sailors, explorers and people during the long winters in the Northern hemisphere found before the time of Captain Cook. The British Navy started giving sailors lime juice to prevent scurvy on long voyages in 1795. Vitamin C is found in high levels in foods such as oranges, limes, lemons, blackcurrants, parsley and capsicums. Vitamin C is water soluble and is...

Ascorbic acid, Chlorine, L-gulonolactone oxidase 1131  Words | 5  Pages

Open Document

Determination of an Unknown Concentration of Potassium Manganate Using Colorimetry

Determination of an Unknown Concentration of Potassium Manganate using Colorimetry Introduction The purpose of this experiment is to conclude the concentration of an unknown solution using colorimetry to plot a calibration curve. Colorimetry measures the absorption of light at wavelengths within the visible region of the electromagnetic spectrum. It can be used to identify the unknown concentration of a solution in reference to a solution of a known concentration. When a solution appears...

Arithmetic mean, Electromagnetic radiation, Laboratory glassware 934  Words | 4  Pages

Open Document

Vitamin C Lab

IB Biology Lab – Vitamin C content of food Aim: To compare the vitamin C content of different fruits using the decolourisation of DCPIP from blue to clear as the indicator. • You first need to estimate the volume of a known concentration of vitamin C solution required to decolourise 2 cm3 of DCPIP solution. • Then you need to determine the volume of fruit juice that decolourises 2 cm3 of DCPIP solution. This gives an estimate of the concentration of vitamin C in fruit juice. • This...

Fruit, Laboratory glassware, Measure 324  Words | 2  Pages

Open Document

Vitamin C

investigate the enzyme concentration and rate of reaction Background To carry out our experiment we used 3 different types of orange juices, and we also used 0.1% of vitamin C solution. The aim of our experiment was to see how much DCPIP was needed to be added to make the orange juices turn back to the orange colour and the DCPIP to decolourise once the 0.1% of vitamin C was added. DCPIP is a blue dye in its non-reduced form; it becomes colourless when it gains electrons. Vitamin C is an anti – oxidant...

Juice, Nectar, Orange Juice 3356  Words | 9  Pages

Open Document

The Vitamin C Content of Fruit Juice

Title : The Vitamin C content of fruit juice Aim : To investigate the vitamin C content of fruit juice. Introduction : [2]Vitamin C, also known as the ascorbic acid or the L-ascorbate, is required for the growth and repair of tissues in all parts of our body. It is necessary to form collagen, an important protein used to make skin, scar tissue, tendons, ligaments, and blood vessels. Vitamin C is essential for the healing of wounds as well as for the repair and maintenance of cartilage, bones...

Acid, Ascorbic acid, Fruit 3082  Words | 9  Pages

Open Document

Vitamin C Dcpip

Vitamin c in fruit juice using dcpip titration Preparing the standard ascorbic acid solution 1. Weigh out accurately about 0.2 g ascorbic acid and make up to 1 L with distilled water. 2. Calculate the concentration of the ascorbic acid solution: C = n/V = m/M/V. Sample calculation: mass of ascorbic acid = 0.205 g C (ascorbic acid) = 0.205/176.12/1.00 = 0.00116 M Preparing the DCPIP solution Weigh out accurately approximately 0.24 g DCPIP (Mr = 268.1g/mol) and make up to 1 L with...

Acid, Ascorbic acid, Erlenmeyer flask 413  Words | 2  Pages

Open Document

Vitamin C Content

: THE VITAMIN C CONTENT OF FRUIT JUICES AND TABLETS DATE OF EXPERIMENT : 1ST AUGUST 2013 DATE OF SUBMISSION : 27TH AUGUST 2013 LECTURER : PUAN ZAKIAH BT. ZAKARIA OBJECTIVE * To determine the vitamin C content in fresh fruit juice * To determine the vitamin C content in commercial fruit juice * To determine the vitamin C content in tablet ...

Ascorbic acid, Citrus, Juice 3490  Words | 10  Pages

Open Document

Designing an Experiment to Measure Vitamin C Content in Fruit Juices

of a solution containing vitamin C is required to be added to 1 cm3 of blue chemical to change its colour from blue to clear. The experiment users an new and old lemon, orange and blackcurrant juice, each with varying amounts of vitamin C content. Each experiment has independent and dependent variables. The solutions of soft drinks contain different levels of vitamin C (with old and new varieties) will be the independent variables in the experiment as the vitamin C content is unknown. The dependent...

Blackcurrant, Chemistry, Citrus 931  Words | 3  Pages

Open Document

Vitamin C Content of Fruit Juices

: The Vitamin C Content of Fruit Juices Lecturer : Madam Rita Rohaizah binti Sohari TITLE: THE VITAMIN C CONTENT OF FRUIT JUICES INTRODUCTION Vitamin C which is also known as ascorbic acid is an essential nutrient for human. It is a water-soluble vitamin that is necessary for normal growth and development. Water-soluble vitamins dissolve in water. Leftover amounts of the vitamin leave the body through the urine. That means a continuous supply of vitamin is needed in daily...

Antioxidant, Ascorbic acid, Citrus 2401  Words | 10  Pages

Open Document

vitamin C lab report

Measuring the Vitamin C content in a variety of fruit juices Background Information Vitamin C, also called ascorbic acid, is a water soluble vitamin. It is a powerful reducing agent that is able to decolourise blue DCPIP (2.6-dichlorophenol indophenols). The decolourisation of DCPIP can therefore be used to calculate the vitamin C content of a variety of fruit juices. Research Question – To determine how the content of Vitamin C (%) will differ in fresh fruits (orange, mango, lemon, lime,...

Ascorbic acid, Citrus, Fruit 1764  Words | 9  Pages

Open Document

Vitamin C Content of Apple Juice

Vitamin C Content of Apple Juice Introduction Complete lack of ascorbic acid (a.k.a Vitamin C) in the diets of humans and other primates leads to a classic nutritional disease, scurvy. This disease was widespread in Europe during the fifteenth and sixteenth centuries, but it is rare today. Ascorbic acid is widely distributed in nature, but it occurs in extremely high concentrations in citrus and green plants such as green peppers and spinach. Ascorbic acid can be synthesized...

Acetic acid, Acid, Antioxidant 785  Words | 5  Pages

Open Document

Quantitative Analysis of Vitamin C Contained in a Fruit Juice

Laboratory exercise 3 : Quantitative analysis of vitamin C contained in a fruit juice Aim: To investigate the amount of vitamin C found in all kinds of fruit juice Introduction : Vitamin C is an antioxidant, along with vitamin E, beta-carotene, and many other plant-based nutrients. Antioxidants block some of the damage caused by free radicals, substances that damage DNA. The build-up of free radicals over time may contribute to the aging process and the development of health conditions such as...

Antioxidant, Ascorbic acid, Orange 902  Words | 3  Pages

Open Document

Biology Vitamin C Lab Report

TITLE: DETERMINING THE VITAMIN C CONTENT IN VARIOUS FRUIT JUICE PREPARED BY: NOR HUSNA BINTI MOHD ROSLI CLASS: SC3 (ALUK 11) IC NUMBER: STUDENT ID: LECTURER’S NAME: MADAM ZAKIAH BINTI ZAKARIA SUBMISSION DATE: 22 AUGUST 2013 OBJECTIVES: To investigate the vitamin C content in various fruit juices which is based on the graph’s curve obtained. INTRODUCTION [pic] Vitamin C, or also known as ascorbic acid (L-ascorbic and...

Antioxidant, Ascorbic acid, Dehydroascorbic acid 4451  Words | 20  Pages

Open Document

Determination of the Equilibrium Constant Using Colorimetric Method

Experiment 19 - Determination of the equilibrium constant for the reaction Fe3+ (aq) + SCN( (aq) = FeSCN2+ (aq) Object: To determine the equilibrium constant by a colorimetric method Theory: Colorimetric methods of analysis are usually applied to the determination of small concentrations of either inorganic or organic materials in a solution. The constituent sought must be coloured or must be capable of reacting with a reagent to produce a substance having a suitable colour. Beers Law, which...

Chemical equilibrium, Chemistry, Concentration 877  Words | 4  Pages

Open Document

Chemistry Lab Report : Determination of Ascorbic Acid Content in Vitamin C Tablets

EXPERIMENT 1 DETERMINATION OF ASCORBIC ACID CONTENT IN VITAMIN C TABLETS INTRODUCTION To calculate the mass of the ascorbic acid and hence the mass percentage of ascorbic acid in the vitamin C tablet. PROCEDURES (Refer to Lab Manual) 1. Accurately weight vitamin C (effervescent type) in a 50 ml beaker. Add about 30 ml of deionised water to dissolve the vitamin C tablet. Once the tablet has dissolved completely, transfer the solution into a 250 ml volumetric flask via a plastic filter...

Ascorbic acid, Erlenmeyer flask, Laboratory glassware 1048  Words | 4  Pages

Open Document

Analysis of Commercial Vitamin C Tablets

Analysis of commercial vitamin C tablets Objective To determine the vitamin C content in commercial vitamin C tablets by titration between vitamin C (ascorbic acid) & iodine solution. Hence, compare this data with the manufacturer's specification. Principle In this analysis, certain amount of iodine solution, which is known in excess, is added to acidified ascorbic acid solution. Brown iodine can be easily reduced by acidified ascorbic acid to form colourless iodide ion: ...

Acid, Ascorbic acid, Iodine 1957  Words | 6  Pages

Open Document

Measurement of Vitamin C

Lab Report: MEASUREMENT OF VITAMIN C Introduction Nutritional diseases were once the number one cause of death only a century ago, but rarely affect our lives today. The complete lack of vitamin C (ascorbic acid) characterized by dark purple spots on the skin and rotting gums, a disease called scurvy, took the lives of many sailors up until the mid 1800s when the prevention was discovered. Consequently, British sailors became referred to as ‘limeys’ because of their daily habit of eating...

Ascorbic acid, Concentration, Erlenmeyer flask 981  Words | 4  Pages

Open Document

Analysis of commercial vitamin C tablets

Chemicals Vitamin C tablet, (1) standard 0.0110 M potassium iodate (KIO3) solution, (100 cm3) standard 0.060 M sodium thiosulphate solution, (Na2S2O3, 160 cm3) 1 M potassium iodide solution, (KI, 20 cm3) 0.5 M H2SO4, (150 cm3) freshly prepared starch solution. Apparatus Titration apparatus Principle In this experiment you are required to determine the vitamin C content of a commercial tablet and compare this with the manufacturers specification. Vitamin C is ascorbic acid, which is rapidly and quantitatively...

Ascorbic acid, Iodine, Potassium iodide 974  Words | 3  Pages

Open Document

How Is Vitamin C Manufactured

How is Vitamin C manufactured? Ascorbic Acid Also known as: l-ascorbic acid, vitamin C, ascorbate A six carbon compound related to glucose. It is found naturally in citrus fruits and many vegetables. Ascorbic acid is an essential nutrient in human diets, and necessary to maintain connective tissue and bone. Its biologically active form, vitamin C, functions as a reducing agent and coenzyme in several metabolic pathways. Vitamin C is considered an antioxidant. http://pubchem.ncbi.nlm.nih.gov/summary/summary...

Brine, E number, Flavor 1901  Words | 6  Pages

Open Document

Vitamin C Content

OBJECTIVE  To investigate the vitamin C content of different fruit juices.  To identify which fruit juices has higher vitamin C content and the lowest vitamin C content.  To determine the standard curve of vitamin C based on percentage of vitamin C.  To differentiate between fresh juices and carton juices.  To consider the reliability and validity of the results. PROBLEM STATEMENT Which type of fruit juices has the most vitamin C content? HYPOTHESIS  The smaller the amount of the...

Citrus, Fruit, Juice vesicles 3233  Words | 10  Pages

Open Document

Determination of Iron in Cereal Using Aas

and breads are also good sources of iron. Even cooking foods in iron pans and pots could increase amount of iron in our diet. Another useful fact is that our body tends to absorb iron better when iron from plant sources eaten with foods rich in vitamin C. According to the Recommended Dietary Allowance (RDA), the need of intakes of iron varies and depends on ones age and gender. For instance, average men in age of 19 to 50 need 8 mg of iron per day which is less than average women age 19 to 50...

Analytical chemistry, Breakfast, Farina 1643  Words | 6  Pages

Open Document

Thermal stability of Vitamin C in Fruit Juice

stability of Vitamin C in Fruit Juice Subtile: Effect of Temperature towards concentration of Vitamin C in Orange Juice Members of the group: Name Identification number Index Number Chan Chyi Yong 950818-08-6787 SA2051/1001 Choong Jian Wen 950620-08-5279 SA2051/1005 Liew Sin Yung 950507-08-5373 SA2051/1011 Yong Yi Xiang 950510-02-5531 SA2051/1018 Teacher Advisor: Pn Kanahambikai Date of Submit of this report: Marks: Abstract Vitamin C or ascorbic...

Ascorbic acid, Celsius, Laboratory glassware 2806  Words | 13  Pages

Open Document

Practical Report: Determination of Concentration Using a Standard Curve

1 Practical report: Determination of concentration using a standard curve Introduction Spectrophotometer is an instrument that confirms the measurement of specified wavelength of light that passes through medium. The measurement of light absorbance by a solution is also done with spectrophometer. Absorption spectrum Spectrometers are mainly and widely functional in identifying the components of solutions that helps determine the components’ concentrations. Compounds are experimentally identified...

Absorption, Chemistry, Concentration 735  Words | 5  Pages

Open Document

What Type of Fruit Juice Provides the Most Vitamin C?

provides the most vitamin C? In my investigation I plan to find out how much vitamin C there is in orange juice, pineapple juice and tropical juice and then compare my results to find out which juice has the most vitamin C. The independent variable is the type of juice and the dependant variable is the volume of fruit juice needed to decolourise 1cm3 Of 1% DCPIP solution. DCPIP solution can be used to measure the amount of vitamin C in each juice as an antioxidant (like vitamin c) reduces the blue...

Apple, Fruit, Juice 635  Words | 2  Pages

Open Document

Vitamin C Content of a Lemon

INTRODUCTION In our experiment we tested the amount of vitamin C in a certain amount of lemon juice. We did this with the help of PCPIP which is an indicator that shows the presence if C vitamin. For this we used the mentioned indicator, pipette, three eprouvetes, 0.1% of C vitamin solution and lemon juice. First we had to get the volume of 0.1% vitamin C solution that is needed for our amount of PCPIP (2ml) to decolorize. Then we had to determine the volume of lemon juice that is needed to...

Ascorbic acid, Citrus, Cofactor 472  Words | 3  Pages

Open Document

Chemistry Vitamin C

tamin C, ascorbic acid, is one of the most important vitamins found in citrus juices, including orange juice. Often projects find that orange juices made from frozen concentrated orange juice (FCOJ) have the highest vitamin C levels as compared to freshly squeezed or not-from-concentrate (NFC) juices. This is probably due to the fact that vitamin C degrades over time in fresh and NFC, but doesn't degrade as much in FCOJ due to it being frozen until reconstitution. If one is comparing a NFC product...

Ascorbic acid, Citrus, Fruit 2358  Words | 7  Pages

Open Document

Biruet Test

Biruiet Test: Procedure Instead of the Biuret Reagent, the following may be used: * Fehling’s Solutions A and B * Sodium hydroxide and copper (II) sulphate solutions 1. Add 2 cm3 of the liquid food sample* to a clean, dry test tube 2. Add 2 cm3 of Biuret Reagent. Alternatively: * Use sodium hydroxide solution and copper sulphate solution instead. Add 1 cm3 of sodium hydroxide solution (40% or bench solution) and 1% copper (II) sulphate solution dropwise – drop by drop - to...

Copper, Copper(I) oxide, Disaccharide 1200  Words | 4  Pages

Open Document

Vitamin Identify Machine

A Machine to identify Vitamins Md. Shafiul Alam ID: 11-94840-2, Section: A American International University (AIUB) Email: fressmind.aiub@ymail.com Abstract. Vitamin is one of the essential elements of human body. To keep our human body fit there is no alternative way of vitamins. We get this essential element in different foods, fruits, vegetable etc. But now a days this vitamin is being identified and measured by the biological and chemical activities which are very much complicated procedure...

Acetic acid, Antioxidant, Ascorbic acid 1266  Words | 4  Pages

Open Document

Determination of soluble solids concentration

Objective To determine soluble solid concentration in some fruits including tropical and temperate fruits by using handheld refractometer. Introduction “Sugar are the major soluble in fruits juices and estimate of sweetness. Other soluble materials include organic and amino acids, soluble pectins, and others. Soluble solid concentration can be determined in a small sample of fruits juice using a hand held refractometer. The measurement must be made at 20°C to get an accurate value. This instrument...

Apple, Banana, Baumé scale 1856  Words | 4  Pages

Open Document

Vitamin C vs Chemotherapy and Radiation Therapy

Vitamins vs. chemotherapy and radiation for cancer therapy We have a general understanding of cancer--one-third of cancer patients die in five years. (1) With present therapies, only slow annual improvement is expected. Vitamins have been extensively demonstrated in clinic trials. (2), (3) Vitamins can strengthen the immune system to improve regular therapies and safely kill cancer. Here we compare cancer therapy by multivitamins with radiation and most chemotherapies. The big question is: Why are...

Ascorbic acid, Cancer, Megavitamin therapy 1460  Words | 4  Pages

Open Document

Become a StudyMode Member

Sign Up - It's Free