"Extraction Of Caffeine From Tea Leaves" Essays and Research Papers

  • Extraction Of Caffeine From Tea Leaves

    EXTRACTION OF CAFFEINE FROM TEA LEAVES ABSTRACT Caffeine extraction from the commercial tea leaves (Lipton Yellow Label Tea) that was done is multiple extraction. 4 tea bags were used in the experiment; tea leaves were weighed having 8.5333 grams. The leaves were boiled in a beaker with 150ml of water; the aqueous tea extract was transferred in a seperatory funnel mixed with DCM (20ml), done thrice. The DCM layer was washed with 20ml 6M NaOH in the seperatory funnel; the organic layer...

    Caffeine, Chemistry, Coffee 1109  Words | 5  Pages

  • Caffeine Extraction from Tea Leaves

    Extraction of Caffeine from Tea Leaves Marc Tugaoen, Kristine Vanzuela, Rafael Villanueva, Justeen Wong Department of Chemistry, University of Santo Tomas, Manila, Philippines Abstract This experiment has been divided into 4 set-ups, first was the solid-liquid extraction, next was the liquid-liquid extraction, then the sublimation and last was the melting point determination. The solid-liquid and liquid-liquid extraction were both done during the first meeting, the DCM layer was filtered and...

    Caffeine, Coffee, Green tea 1390  Words | 5  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of caffeine from Lipton tea leaves Maria Gianna Beatrice L. Cancio*, Joe Mari Isabella B. Caringal, Rowena A. Chiang, Patricia Deanne del Valle Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila, Philippines Abstract Caffeine was extracted from Lipton tea leaves by multiple extraction techniques namely solid to liquid extraction and liquid to liquid extraction; the purification by sublimation and melting point determination. Three...

    Caffeine, Liquid, Liquid-liquid extraction 2197  Words | 7  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of Caffeine from Tea Leaves Department of Biological Sciences, College of Science University of Santo Tomas España, Manila, 1028 ABSTRACT: Caffeine is a white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds, leaves, and fruit of some plants. It is most commonly consumed by humans in infusions extracted from the seed of the coffee plant and the leaves of the tea bush, as well as from various foods and drinks containing...

    Caffeine, Chemistry, Melting point 1526  Words | 5  Pages

  • Extraction of Caffeine from Tea Leaves

    describes the extraction of caffeine from tea leaves to determine its % caffeine. The extraction process selectively dissolves one or more compounds in a mixture into an appropriate solvent. In this experiment, it was visible in the process wherein the components of the tea leaves were dissolved in two solvents, water and dichloromethane (DCM), with DCM used for multiple extractions. The organic layer was evaporated and the determined % caffeine was 0.12%. Furthermore, the purified caffeine was subjected...

    Black tea, Caffeine, Camellia sinensis 2313  Words | 7  Pages

  • Extraction of Caffeine from Tea Leaves

    Abstract: Caffeine, (C8 H10 N4 O2) a white, crystalline alkaloid known as a nervous system stimulant found commonly in tea leaves and coffee, can be extracted using the method of sublimation with the use of Methylene Chloride (CH2Cl2) and Sodium Hydroxide; both can repeatedly rinse the green (unroasted) coffee beans from the caffeine. Keywords: Caffeine, Methylene Chloride, Sodium Hydroxide, Anhydrous Sodium Sulfate I. Introduction Caffeine is an alkaloid of the methylxanthine family. Its chemical...

    Caffeine, Coffee, Dichloromethane 1191  Words | 4  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of Caffeine from Tea Leaves Introduction Caffeine is soluble in boiling water and as a result it is easily extracted from tea bags by steeping in hot water. This process leaves behind the water insoluble portions of the tea bag. However, water extracts more than just caffeine, so a final separation is done with an organic solvent that will dissolve primarily caffeine. The organic solvent used in this experiment is Dichloromethane (CH₂Cl₂). Dichloromethane is less polar than water...

    Chloroform, Dichloromethane, Diethyl ether 1151  Words | 4  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of Caffeine from Tealeaves Perez, Albert Solomon K.*; Quiambao, Marie Angela C;.Pascua, Hanna Harriette R.; Patricio, Maria Roxanne DC.; 2-Chemistry, Department of Chemistry, College of Science University of Santo Tomas España St., 1015, Manila Abstract Caffeine is soluble in both water and organic solvents, solid-liquid extraction and liquid-liquid extraction were used in the experimentation process. Caffeine was extracted using hot water, however, due to its...

    Caffeine, Camellia sinensis, Green tea 1798  Words | 7  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of Caffeine from Tea Leaves Santos, Raphael, Samson, Nonia Carla, *Tabora, Brylle, Tan, Kate Michal Department of Biological Sciences, University of Santo Tomas, Manila, Philippines Abstract Tea leaves are natural products that are harvested from agriculture. Caffeine, on the other hand, is a stimulant that has been shown to speed up the time of reaction, increase alertness, and improve one’s concentration. What we did in this experiment was to extract the alkaloid caffeine content...

    Alkaloid, Caffeine, Chemistry 631  Words | 3  Pages

  • Multiple Extraction of Caffeine from Dried Tea Leaves

    MULTIPLE EXTRACTION OF CAFFEINE FROM DRIED TEA LEAVES USING DICHLOROMETHANE Delos Reyes, K., Dizon, G.J., Enriquez, J.R., Estrada, G. and Garcia C. Group 4 2G Med Tech Organic Chemistry Laboratory ABSTRACT Caffeine was extracted from dried tea leaves by multiple extraction technique. 10g of tea leaves was boiled in a solution of 4.4 g anhydrous sodium carbonate and 100ml distilled water and was extracted three times using 20 ml of dichloromethane. Theresidue was collected by decanting...

    Chemistry, Evaporation, Liquid-liquid extraction 780  Words | 3  Pages

  • Extraction of Caffeine from Tea Bags

    Extraction of caffeine from tea bags ABSTRACT Caffeine extraction from the commercial tea leaves (Lipton Yellow Label Tea) that was done is multiple extraction. 4 tea bags   were used in the experiment; tea leaves were weighed having 8.5333 grams. The leaves were boiled in a beaker with 150ml of water; the aqueous tea extract was transferred in a seperatory funnel mixed with DCM (20ml), done thrice. The DCM layer was washed with 20ml 6M NaOH in the seperatory funnel; the organic layer was dried...

    Black tea, Caffeine, Camellia sinensis 2408  Words | 7  Pages

  • Isolation of Caffeine from Tea Leaves

    Extraction of Caffeine from Lipton® Tea Leaves Nathaniel Camangon*, Kaila Bumagat, Franz Mari Burgos, Remigio Callanta Department of Chemistry, College of Science, University of Santo Tomas, Manila, Philippines Abstract This experiment mainly focuses on the extraction of pure caffeine by multiple extraction from commercially acquired tea leaves and determining its purity by melting point determination. A 0.02% yield of pure caffeine was obtained from 10.4978g of tea leaves (4 tea bags)....

    Caffeine, Green tea, Liquid-liquid extraction 1966  Words | 6  Pages

  • Isolation of Caffeine from tea leaves

    EXPERIMENT 11: ISOLATION OF CAFFEINE FROM TEA LEAVES COMPOUND PROCEDURE Preparation of Tea Solution: We started out experiment by weighing out 5.023g of tealeaves and 2.008g of calcium carbonate powder. These two substances were mixed with 50ml of water and heated under gentle reflux in a round-bottom flask using a condenser apparatus. The hot solution was then filtered and the filtrate was collected and cooled. Extraction and Drying: Using a separatory...

    Benzene, Caffeine, Distillation 1341  Words | 5  Pages

  • Isolation of Caffeine from Tea Leaves using Multiple Liquid-Liquid Extraction

    ABSTRACT This study is about the isolation of caffeine from tea leaves in Lipton tea bags using the multiple extraction method. The objective of this study is to differentiate simple extraction from multiple extraction method and to obtain the percentage yield of caffeine for both extraction methods. Ten grams of tea leaves was boiled in a solution of 4.4 g of anhydrous sodium carbonate and 100 mL of distilled water. From this solution, caffeine was extracted using 60 mL of dichloromethane which...

    Caffeine, Chemistry, Liquid-liquid extraction 1346  Words | 5  Pages

  • Isolation of Caffeine from Tea Leaves

    Isolation of Caffeine from Tea Leaves Introduction Caffeine is a member of the class of compounds organic chemists call alkaloids. Alkaloids are nitrogencontaining basic compounds that are found in plants. They usually taste bitter and often are physiologically active in humans. The names of some of these compounds are familiar to you even if the structures aren’t: nicotine, morphine, strychnine, and cocaine. The role or roles these compounds play in the life of the plants in which they are found...

    Black tea, Caffeine, Camellia sinensis 1818  Words | 5  Pages

  • Isolation of caffeine from tea leave

    Isolation of caffeine from tea leave Abstract:- Introduction:- Caffeine is probably the most commonly used addictive drug. This drug is found in a number of things ingested by people. It belongs to a group of nitrogen bases called purines. Because caffeine possesses these base-like properties, it is described as an alkaloid. They usually taste bitter and often are physiologically active in humans. The structure of caffeine is shown below. Figure 1: Structure of Caffeine In this experiment...

    Caffeine, Chemical substance, Chemistry 699  Words | 2  Pages

  • Caffeine Extraction from Nature's Pride Tea

    Result of Extraction Weight (g) Tea Leaves 5.5783 Crude Caffeine 0.0246 Empty Beaker 117.5350 Beaker + Crude Caffeine 117.5596 The table above shows the weight of the sample tea leaves, the crude caffeine content in the sample, the empty beaker used in the extraction, and the beaker with the crude caffeine. It is induced from there that for that amount of sample tea leaves, which is equivalent to three bags of Nature’s Pride Tea; there is a 0.0246 g content of crude caffeine for every...

    Antioxidant, Caffeine, Catechin 831  Words | 4  Pages

  • Lab Report: Extraction of Caffeine from Tea Bags

    a liquid-liquid extraction method to extract the caffeine from the tea bags that were provided, and then recrystallize the caffeine. The solvents used in the experiment were an aqueous sodium carbonate and dichloromethane (DCM). Anhydrous calcium chloride pellets were used to dry the solution and emulsion layer and the DCM was then decanted. After washing the anhydrous calcium chloride pellets with more DCM, the solvent was evaporated, leaving greenish-white crystalline caffeine residue weighing...

    Chemistry, Laboratory glassware, Sodium 1178  Words | 4  Pages

  • Isolation of Caffeine from Tea

    of Submission: November 28, 2012 Experiment No. 1 ISOLATION OF CAFFEINE FROM TEA I. Introduction Caffeine is a very common substance and is found in coffee, tea, soft drinks, chocolate, and "stay-awake" pills such as Vivarin. It can be synthesized or isolated from natural sources. Caffeine constitutes approximately 4% of tea and coffee leaves, and is also found in cola nuts and cacao beans. Caffeine is a member of the class of compounds organic chemists call alkaloids. Alkaloids...

    Caffeine, Distillation, Evaporation 1380  Words | 5  Pages

  • Isolation of Caffeine from Tea

    Experiment # 1 Isolation of Caffeine from Tea I. Introduction Organic compound can be separated and can be obtained from a mixture of compounds by chemical, physical or mechanical means using the process called Extraction. One or more of the mixture compounds can selectively dissolve into an appropriate solvent in the process of extraction where dissolved compounds is referred to as Extract. The experiment comprises the solid-liquid extraction, the liquid-liquid extraction and distillation. The...

    Chemistry, Ethanol, Evaporation 1248  Words | 5  Pages

  • Extraction of Caffeine from Thea Sinensis

    Extraction of Caffeine from Lipton Yellow Label Teal Leaves Arlie Bamiano, Jealine Bernabe, Petrenne Caimbon*, Jhia Caso Department of Biology, University of Santo Tomas Abstract In order to extract pure caffeine from Lipton Yellow Label tea leaves, several extractions and phase transition techniques were employed to 6.5029 grams of sample. Initially, the tea leaves were boiled in water to extract tea from the leaves (Solid-Liquid Extraction). After extracting the tea, several steps of...

    Caffeine, Green tea, Laboratory glassware 1592  Words | 7  Pages

  • Extraction of Caffeine from Thea Sinensis

    Extraction of Caffeine from Thea sinensis Abstract Extraction of Caffeine from Thea sinensis main objective is to isolate, purify characterized caffeine from tea leaves. Sublimation technique was used to get the % yield which is 0.07%. The melting point of the standard caffeine with the sublimate is 229°C. Introduction The active ingredient that makes tea and coffee valuable to humans is caffeine. Caffeine is an alkaloid; a class of naturally occurring compounds containing nitrogen and...

    Caffeine, Coffee, Green tea 1695  Words | 6  Pages

  • Extraction of Caffeine

    Extraction of Caffeine from Tea Leaves Jaybee Balilea, Sharmaine Baysic, and Maria Anjelette Patricia Belen 3BIO7, Department of Biology, University of Santo Tomas, Manila, Philippines Abstract Extraction is a technique for isolating and purifying organic substances. In this technique, a solution is combined thoroughly with a second solvent that is immiscible with the first solvent. The solute is extracted from one solvent into the other because it is more soluble in the second solvent...

    Caffeine, Distillation, Green tea 1572  Words | 6  Pages

  • Extraction of Caffeine

    Extraction of Caffeine from Tea leaves Casinabe, Antonio Karlo,*Catahay, Jesus Alfonso, Cerdena, O’neil, Cordova, Robelle Department of Biological Sciences, College of Science University of Santo Tomas, España Street, Manila 108 Group 4 2MB Date Submitted: December 13, 2012 ------------------------------------------------- ABSTRACT: The purpose of this experiment is to extract the amount of caffeine present in tea bags. In this experiment, isolation, characterization and purification...

    Caffeine, Chemistry, Extraction 1896  Words | 7  Pages

  • Extraction of Caffeine from Tea leaves

    of alkaloid caffeine from tea leaves Date Submitted: September 3, 2014 Abstract Caffeine is one of the main constituents of tea leaves. In this experiment, 0.0039 g of pure caffeine was isolated from tea leaves. This was done through solid-liquid extraction followed by multiple liquid-liquid extraction. Then crude material obtained was then purified by sublimation. The isolated caffeine was subjected to thin layer chromatography (TLC) together with a standard caffeine. The Rf value...

    Benzene, Caffeine, Coffee 1976  Words | 5  Pages

  • Extraction of Caffeine

    note: A09-010A The quantitative determination of caffeine in beverages and soft drinks using UV wavelength spectroscopy Introduction Caffeine is a naturally occurring alkaloid which is found in the leaves, seeds or fruits of over 63 plants species worldwide. The most common sources of caffeine are coffee, cocoa beans, cola nuts and tea leaves and the worldwide consumption of products derived from these natural materials means that caffeine is one of the most popular and commonly consumed drugs...

    Caffeine, Coca-Cola, Coffee 1381  Words | 5  Pages

  • Caffeine extraction from Tea leaves

    water boiled and was removed from the hot plate, 5 black tea bags were added to the beaker. After steeping for 7 minutes, the tea bags were thoroughly squeezed in order to extract as much water as possible. The tea color was extremely dark at this point. After decanting the aqueous solution into a 250ml Erlenmeyer flask, it was cooled in an ice bath to room temperature. Once cooled, the solution was transferred to a separatory funnel in preparation for extraction. If not cooled properly, the...

    Boiling point, Caffeine, Chemistry 667  Words | 2  Pages

  • Extraction and Sublimation of Caffeine

     Extraction and Sublimation of Caffeine from Tea Leaves By: Ashley Barnes CH 236 – P8 Experiment 4 & 4.5 Due: 10/15/2014 Table 1. Table of Reagents Discussion The extraction yield refers to the percent of caffeine in the tea leaves at start of the extraction experiment. Tea leaves had 0.55 grams of mass per eight ounce serving. The weight of the extracted crude caffeine was 0.264 grams. Therefore, the extraction yield was 48%. This means that we pulled out almost half of...

    Caffeine, Extraction, Gas 906  Words | 5  Pages

  • Extraction

    EXTRACTION Organic Chemistry Laboratory This experiment was conducted in order to compare single and multiple extraction of caffeine from dried tea leaves and to calculate the percentage yield of caffeine for both extraction procedures. The group was assigned to do the multiple extraction. Before the extraction proper, the water bath containing the anhydrous sodium carbonate and distilled water was heated. As the sodium carbonate dissolves, tea leaves were added in the mixture and allowed to...

    Caffeine, Chemistry, Concentration 646  Words | 3  Pages

  • Caffeine Extraction from Tea Pre Lab Report

    Describe an alternative method for evaporation of the CH2Cl2 Can be steamed and then rinsed with ethyl acetate for several hours, and then rinsed with water, or can be soaked in a bath of CO2 and run through water, making carboxylic acid. (2) Caffeine: (4) Repeated exposure can produce general deterioration of health by an accumulation in one or many human organs. First Aid Measures: Eye contact - Immediately flush eyes with plenty of water for at least 15 minutes. Cold water may be used. WARM...

    Chemistry, Distillation, First aid 662  Words | 2  Pages

  • Isolation of Caffeine from a Tea Bag

    Experiment 11b: Isolation of Caffeine from a Tea Bag October 12,2012 Purpose: The objective of this experiment is to extract caffeine from tea bags using the method of extraction. After the caffeine is extracted it is then compared to the nutritional facts amount per serving on the tea bags box. Supplies: Glassware: 1. 50.0 m L graduated cylinder 2. 150.0 mL beaker 3. 2-glass stirring rod 4. 6-test tubes 5. 2-glass pipettes 6. 2-50.0 mL Erlenmeyer flasks 7. glass funnel Hardware: ...

    Caffeine, Erlenmeyer flask, Fleaker 1774  Words | 6  Pages

  • lab extraction of caffeine

    261 (KC) Dr . McAtee Lab : Extraction of Caffiene Purpose: the purpose of this experiment is to extract caffeine from tea using solvent extraction techinques. Reference: Williamson, K.; Minard, R.; Masters, K. Macroscale and Microscale Organic Experiments, 2007, p. 137 to 171. Procedure: In a 50 mL beaker place 15 mL of water, 2.0059 g of sodium carbonate, and a wooden boiling stick. Bring the water to a boil on the ceramic heating plate. Remove the beaker from the hot plate and remove...

    Boil, Erlenmeyer flask, Evaporation 758  Words | 4  Pages

  • Extraction of Caffaine

    SINGLE EXTRACTION OF CAFFEINE FROM TEA LEAVES Anne Jillian M. Castillo ABSTRACT In this experiment, the technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into an appropriate solvent []. Tea leaves were boiled in distilled water with anhydrous sodium carbonate in order to precipitate the tannins. The tea extract was then placed into a separatory funnel with dichloromethane...

    Caffeine, Chemistry, Coffee 1212  Words | 6  Pages

  • Extraction of Caffeine from Tea Leaves

    increments. All inputs are held constant. 6) Which of the following inputs are variable in the long run? A. B. C. D. Labor. Capital and equipment. Plant size. All of given options. 7) When labor usage is at 12 units, output is 36 units. From this we may infer that: A. B. C. D. The marginal product of labor is 3. The total product of labor is 1/3. The average product of labor is 3. None of the given options. Virtual University of Pakistan QUIZ 02 ECO402 8) The rate...

    Arithmetic mean, Diminishing returns, Economics 854  Words | 8  Pages

  • Extraction of Caffeine from Tea

    chemical synthesis: extraction of crude caffeine pose little toxicity to human health and the environment.(1) Q2) Things not green: According to GCP# 5 i.e. Safer solvent and auxiliaries: In liquid-liquid extraction of caffeine, Dicholoromethane was used which is a hazardous chemical and have potential acute health effects(2). According to GCP#12 i.e. Inherent safer chemistry for accident prevention: The separatory funnels used in the experiment for liquid-liquid extraction was a dangerous procedure...

    Benzene, Chemical reaction, Chemistry 288  Words | 2  Pages

  • Seperating Green Tea

    Solid-liquid extraction and liquid-liquid extraction of caffeine from tea leaves Andrew Jensen Lab partners: Jamie Pawluk, Joe Luong 230105559 Chem 250 L2 Oct,4,2012 Introduction: Extraction is the experimental procedure of obtaining a desired compound with the use of a solvent from either a liquid or solid mixture. Solid-liquid extraction involves the removal of organic compounds from solid material. This method of extraction may be achieved through extraction of the organic compound...

    Caffeine, Green tea, Laboratory glassware 1046  Words | 3  Pages

  • Green tea(from the Internet)

    What is Green Tea? Green tea is a type of tea that is solely made from the leaves of Camellia Sinensis. It is used as a beverage which have many health benefits as compared to other types of tea. Black & Oolong are the other forms of tea, which are also made from Camellia Sinensis. But, the benefits that you can gain from the tea, cannot be gained by other types of tea. Green Tea processing is different than others. Green Tea has the the highest concentration of powerful antioxidants called poly...

    Antioxidant, Black tea, Caffeine 1613  Words | 5  Pages

  • Caffeine

    Caffeine in the diet Email this page to a friend Bookmark & Share Printer-friendly version Caffeine is a substance that is found in certain plants. It can also be man-made (produced synthetically) and then added to food products. It is a central nervous system stimulant and a diuretic (substance that helps rid your body of fluids). Function Caffeine is absorbed and passes quickly into the brain. It does not collect in the bloodstream or get stored in the body. It leaves the body in...

    Caffeine, Coca-Cola, Coffee 1322  Words | 6  Pages

  • Isolation of caffein from a teabag

    Experiment 1 : Isolation of caffein from a teabag. INTRODUCTION The aim of this experiment is to extract caffein from tea bag. Caffein is an odorless, bitter, hot water soluble stimulant from the xanthine alkaloid. The real name is trimethylxanthine. It can be found in various beans, leaves, and fruit of some plants, acting as natural pesticide by paralyzing and killing certain insects that are feeding on them. Human intake of caffein mostly come from coffee beans and tea consumption. Carbonated drinks...

    Caffeine, Coffee, Sodium chloride 1231  Words | 5  Pages

  • Caffeine

    Caffeine is a naturally occurring compound found in the leaves and fruits of certain plants. Caffeine is found in coffee, tea, cocoa, cola soft drinks and energy drinks. It may also be found in chocolate bars, energy bars and some over-the-counter medications, like cough syrup and slimming tablets. Caffeine has had a long and rich history; humans have been consuming caffeine since the Stone Age. Early peoples found that chewing the seeds, bark, or leaves of certain plants had the effects of easing...

    Caffeine, Coca-Cola, Coffea 938  Words | 3  Pages

  • Extraction of Chlorophyll from Spinach Leaves

    spinach leaves and extract the chlorophyll and carotenoid pigments by using acetone as the solvent. The chlorophyll and carotenoid pigments were extracted by using column chromography and alumina was used as the solvent. Solvents of different polarities were used, starting with the least polar, to extract the certain components from the leaves. They were then analyzed by using thin- layer chromatography. Procedure: The first part of the experiment dealt with breaking down the spinach leaves in a...

    3, Acetone, Chromatography 1391  Words | 4  Pages

  • Caffeine extraction

    extract caffeine from tea powder using polar - nonpolar solvent extraction technique. Theory:   The technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solution of these dissolved compounds is referred to as the Extract. Here the organic solvent dichloromethane is used to extract caffeine from an aqueous extract of tea leaves because caffeine is more...

    Black tea, Caffeine, Coffee 2952  Words | 10  Pages

  • caffeine

    Evidence Homework #1 Topic: Caffeine Preview: Every morning when I wake up the first thing I do after brushing my teeth is walk straight to the coffee pot. I pour myself a hot rich cup of coffee to start the day off. On my way out the door I grab my go cup and fill it up. When I finally get to school I get myself another cup of coffee. How many miller grams of caffeine do you think I have drank at this point? According to the Mayo Clinic a healthy amount of caffeine for an adult is 200 to 300 miller...

    Caffeine, Central nervous system, Coca-Cola 966  Words | 3  Pages

  • Isolation of Caffeine from Coffee

    -------------------------------------------------   Isolation of Caffeine from Coffee Date of laboratory work: 10/9/2012 5:00-7:45 Date of report written: 10/15/2012 Introduction: The purpose is to isolate caffeine from coffee by using the organic solvent dichloromethane (CH2Cl2) that is also referred to as direct contact. Calcium carbonate (CaCO3) is used to remove the tannins from the coffee. Afterwards an extraction is used to separate the organic layer (bottom) from the aqueous layer (upper). By using...

    Caffeine, Chemistry, Distillation 873  Words | 4  Pages

  • Amount of caffeine in team samples

    Determination of Caffeine in Tea Samples CONTENTS 1. 1. Introduction 2. 2. Theory 3. 3. Uses of Caffeine 4. 4. Effects of Caffeine 5. 5. Procedure 6. 6. Observations 7. 7. Result INTRODUCTION Tea is the most commonly and widely used soft beverage in the household. It acts as a stimulant for central nervous system and skeletal muscles. That is why tea removes fatigue, tiredness and headache. It also increases the capacity of thinking. It is also used for lowering body temperature...

    Caffeine, Camellia sinensis, Central nervous system 901  Words | 4  Pages

  • Siamote Tea

    that are abundant in our country. One of these is the siam weed leaves and kamote leaves that can be found almost everywhere inUrdaneta City, but, it is being ignored by many people. These plants are very useful and can be an herbal plant. Nowadays, there are an abundant number of products coming out from market and one of these products is commercialized teas that undergo processes that may threaten our health. Siam weed leaves contains tannin which is an astringent, bitter plant polyphenolic...

    Antioxidant, Black tea, Caffeine 1147  Words | 4  Pages

  • Banana Leaves as Tea

    ------------------------------------------------- Banana Leaves as Tea ------------------------------------------------- ------------------------------------------------- Like coconuts, bananas grow in abundance here in the Philippines as it is a tropical country. For the many years of study, cultivation and propagation, research and development, we have become as one of the exporters of bananas to the world, especially to the United States and Europe – when speaking of the banana fruit, of...

    Antioxidant, Catechin, Epigallocatechin gallate 687  Words | 3  Pages

  • Caffeine Analysis

    to introduce my self first. My name is David Cho * Caffeine is used to provide a "boost of energy" or a feeling of being more alert. It's often used to stay awake longer and many people feel as though they "cannot function" in the morning without a cup of coffee to provide caffeine and the boost it gives them. 9 in 10 Americans consume some form of caffeine regularly, making it the most popular behavior-altering drug. * Caffeine is a naturally occurring substance. It is part of a group...

    Blood sugar, Caffeine, Coca-Cola 884  Words | 3  Pages

  • Extraction of Caffeine

    In this experiment, Caffeine was extracted from a commercial tea bag through solid-liquid extraction, and then further purified through sublimation. To begin the extraction, the commercial tea bag containing ~55mg of caffeine was placed in a mixture containing 2.2g of anhydrous sodium carbonate along with 20 ml of D.I. water. The sodium carbonate was placed into the solution to keep the caffeine from becoming slightly acidic(protonated), which would prevent the caffeine from being able to be separated...

    Caffeine, Chemistry, Partition coefficient 789  Words | 2  Pages

  • The Truth About Caffeine 1

    The truth about caffeine How many of you here consider yourself caffeine addicts? How much coffee do you drink a day? One cup? Two cups? More? If you crave caffeine to get you through the day, you're not alone. About 68% of Americans say they're hooked on coffee this year, compared with 64% last year, according to the National Coffee Association. But of course, Caffeine and related compounds are found not only in coffee, but also in tea, soft drinks, and chocolate. Most...

    Addiction, Caffeine, Camellia sinensis 751  Words | 3  Pages

  • Green Tea

    TEA Dr. B.L. Wedzicha of t h e Procter D e p a r t m e n t of Food Science, U n i v e r s i t y of Leeds, describes t h e c h e m i s t r y of black t e a manufacture Tea is the m o s t w i d e l y c o n s u m e d beverage in the w o r l d . The economic importance of an annual w o r l d production of tea estimated to be in the region of 1-1·5 million tonnes has resulted in considerable attention being paid to the understanding of the chemical and physical changes w h i c h take place during tea...

    Black tea, Caffeine, Camellia sinensis 1850  Words | 5  Pages

  • Tea Project

    INTRODUCTION Tea is made from the young leaves and buds of the tea plant. Tea leaves are rich in caffeine (an alkaloid). Besides caffeine, tea leaves also contain tannic acid and coloring matter, such as polyphenolic compounds. The relative amounts of these substances are different in different varieties of tea leaves, which is why, their tastes and flavours are different. The brownish color of the tea is due to the presence of polyphenolic compounds and...

    Caffeine, Camellia sinensis, Catechin 732  Words | 5  Pages

  • Green Tea Health Benefits

    health benefits as green tea? The Chinese have known about the medicinal benefits of green tea since ancient times, using it to treat everything from headaches to depression. In her book Green Tea: The Natural Secret for a Healthier Life, Nadine Taylor states that green tea has been used as a medicine in China for at least 4,000 years. Today, scientific research in both Asia and the west is providing hard evidence for the health benefits long associated with drinking green tea. For example, in 1994...

    Black tea, Caffeine, Camellia sinensis 657  Words | 3  Pages

  • Disadvantage of Caffeine

    Computing Caffeine Informative Speech John Cedrick D. Balaguer BSIT 3 English 3 : Speech and Oral Communication Skills 1st Semester S.Y. 2013 – 2014 July 17, 2014 1 of 1 Caffeine has been used widely around the world over centuries, and today it is estimated that 80% of the world’s adult population consumes caffeine in one form or another. What is it about caffeine that has made it so popular? To begin with, one of the first characteristic effects of caffeine is its ability...

    Caffeine, Central nervous system, Coffee 989  Words | 4  Pages

  • Informative Speech Caffeine

    Rachel DeLaune CMST 2060 Caffeine Specific Purpose: To inform my audience about the history of caffeine, how the body processes caffeine, and possible side effects of excessive caffeine consumption. Central Idea: Caffeine has been around for centuries and has been used for it energizing effects on the body . Introduction I. It’s the night before your chemistry exam and you decide to learn three weeks worth of material in one night. II. When 1:30 comes around and you can feel your eyes starting...

    Boston Tea Party, Caffeine, Coffea 893  Words | 5  Pages

  • History of Green Tea in Japan

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  • Caffeine Addiction

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  • Green tea paper

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  • Caffeine

    Introduction A. Attention Getter: If you drink some kind of caffeine on a daily basis or close to that often, please raise your hand. Those you without your hands raised make up a rare percentage of today’s Americans. An article published in the Chicago Tribune on October 19, 2011 by Julie Deardorff, stated that nearly 90% of Americans drink coffee on a regular basis. B. Relevance Statement: When asked if you drank coffee or another source of caffeine regularly, the majority of the class raised their hand...

    Caffeine, Chicago Tribune, Coca-Cola 1120  Words | 4  Pages

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