Acidity regulators are used to alter and control the acidity or alkalinity on a specific level important for processing, taste and food safety. Inadequate control of the pH can result in the growth of undesirable bacteria in the product that could be a potential health hazard.
The pH of a food is the measure of that product's acidity or alkalinity. The pH-scale ranges from 0 to 14. A pH less than 7 is acidic, a pH of 7 is neutral and a pH greater than 7 is alkaline or basic. Our sense of taste can recognize only major differences in the pH within complex food systems. An acid product would taste sour, while an alkaline product would taste bitter. Some examples of acid foods are citrus fruits (e.g. orange, lemon, grapefruit), juices or yoghurt. Examples of alkaline products are egg white and baking soda.
Examples of acidity regulators Edit
Citric acid (E330) enhances the activity of many antioxidants, but is no antioxidant by itself. It is mainly used as an acidity regulator as well as aroma compound. In addition it increases gel consistency in marmalades and decreases enzymatic browning in fruits and fruit products.
Calcium acetate (E263) has several functions. It is used in some foods as a thickening agent (cake mixtures, puddings, pie fillings), but can act as a buffer in controlling the pH of food during processing, as a preservative to prevent microbial growth, and as a calcium supplement in pet products.
|E260||Acetic acid||Fish fingers, butter, margarine, processed cheese, curry powder, cooking oil.|
|E263||Calcium acetate||Packet desserts, pie fillings.|
|E270||Lactic acid||Cheese, milk, meat and poultry, salads, sauces and beverages.|
|E296||Malic acid||Tinned fruit, vegetables and pulses, jams, jelly, frozen vegetables.|
|E297||Fumaric acid||Bread, fruit drinks, pie fillings, poultry, wine, jams, jelly.|
|E330||Citric acid||Fruits and vegetables (lemons and limes), soft drinks.|
|E334||Tartaric acid||Bakery, candies, jams, juices and wine.|
Acidity regulators are subject, just like any other food additive, to stringent legislation governing authorisation. This legislation requires all added acidity regulators, as all food additives, to be declared on food packaging by their category with either their name or E-number.