wikipedia.org/wiki/Preservative http://en.wikipedia.org/w/index.php?title=Preservative&action=edit A preservative is a naturally occurring or synthetically produced substance that is added to products such as foods‚ pharmaceuticals‚ paints‚ biological samples‚ wood‚ etc. to prevent decomposition by microbial growth or by undesirable chemical changes. Preservatives can be divided into two types‚ depending on their origin. Class I preservatives refers to those preservatives which are naturally
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Also known as "benzoate of soda‚" sodium benzoate is an FDA-approved‚ polyunsaturated fat that has been used by food manufacturers for over 80 years to inhibit microbial growth. As a food additive it is used as a preservative‚ effectively killing most yeasts‚ bacteria and fungi. Sodium benzoate is effective only in acidic conditions (pH < 3.6) making its use most prevalent in foods such as preserves‚ salad dressings (vinegar)‚ carbonated drinks (carbonic acid)‚ jams (citric acid)‚ fruit juices (citric
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“ Food Preservatives” Submitted in Partial Fullfillment of the Requirements for the subject of Advance Chemistry IV to the Pisco Private School By: Mary Maren M. Guanlao 4th year Blaise Pascal Mary Maren M. Guanlao Mrs. Maria Dulce Bongon Adv Chemistry IV 12‚ April 2013 Food Preservatives Food is all around us and is necessary for everyday survival. Yet it has become so different from what it used to be. With the
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Tables 1 to 5 shows the different food products in each food group and the name‚ E-Number of the preservatives and preservation method for each product. Graphs 1 to 5 simply show the different foods in each food group and the number of chemical preservatives they contain and do not contain. -Fruit and Vegetables Table 1 and Graph 1 show that only 40% of the fruit and vegetables only contained chemical preservatives. One of the items of food was banana chips‚ this product contains Sulphur Dioxide
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Effect of pH on a Food Preservative 6/11/13 Purpose: (1 point) To determine whether a chemical change occurs when Sodium Benzoate is acidified to Benzoic Acid. Theory: (2 points) Sodium Benzoate is a common food preservative found in jellies‚ jams‚ sodas‚ fruit juices‚ etc... Its acid‚ Benzoic Acid‚ is an organic preservative that stops the growth of bacteria‚ yeasts‚ and molds. Reaction: (3 points) Reaction: sodium benzoate + hydrochloric acid ( benzoic acid + sodium chloride Amounts:
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on a Food Preservative 9-1-2011 Purpose The purpose of this lab was to determine if a new substance forms when sodium benzoate is placed in a simulated stomach acid. Theory Benzoic acid can be found in a wide variety of plants. It is used as a natural preservative in many foods. Sodium benzoate‚ the salt of benzoic acid‚ has become a more popular choice as a food preservative because it is more soluble in water than benzoic acid. Many food items found today are preserved with sodium benzoate
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Benzoic Acid and Benzoates in Food‚ Drinks and Medicines Benzoic acid and benzoates are common additives to food‚ drinks‚ medicines and cosmetics‚ and they also occur naturally in many plants. They are useful chemicals in manufactured products because they kill or inhibit both bacteria and fungi and can act as preservatives. Benzoic acid and benzoates are considered to be safe chemicals for humans when they’re used in small quantities‚ but there are at least two situations in which even small
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The Effect of pH on a Food Preservative September 18‚ 2012 Objective: To study the affect of pH on a food preservative. Chemical Equation: C6H5COONa + HCL ------ C6H5COOH + NaCl Procedure: This experiment was started with a clear solution of sodium benzoate and HCl was added to it‚ ultimately producing benzoic acid. First‚ .3395 g of sodium benzoate was weighed‚ then it was dissolved in water‚ causing it to disassociate into ions. Next‚ 3M of HCl were added drop wise to the solution
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Lab 1: Effect of pH on sodium benzoate‚ a food preservative Sheikh M Zakaria Person no. 36295651 TA: Synthia Gratia Date of Submission: 05/29/13 Abstract Sodium Benzoate is a common food preservative used in food products such as jams and jellies‚ soft drinks‚ pickles‚ condiments etc and in tinned products in the market. This experiment aimed to determine whether benzoic acid is formed from it’s superior soluble form sodium benzoate in stomach acid‚ which is simulated by HCl (pH=2). It has
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taste for longer as well as to meet the requirements of food manufactures many chemical compound have been discovered and developed as ways to preserve food and extend their life for longer. With the increasing of new technologies‚ transportation and a growing population‚ food processing which requires the use of preservatives‚ ensures the extension of shelf life of many foods and beverages. There are many different types of food preservatives that are added to our daily diet. Butylated hydroxyanisole
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