Preservatives in caffeinated beverages
INTRODUCTION
Sodium and potassium salts of benzoic acid and sorbic acid are well-known food preservatives. The permitted amount in food is strictly regulated with the level depending on the food group. As an example, European regulation EC 1333/2008 sets the rules on food additives: definitions, conditions of use, labelling and procedures.
ABSTRACT
Determination of sodium benzoate (CAS 532-32-1), potassium sorbate (CAS 24634-61-5) and caffeine (CAS 58-08-2) in caffeinated beverages on an ASTRA® C18-HE, 3.0 µm column (50 mm × 2.1 mm, AST-5732-IG21). Isocratic elution with 51.4 mM sodium acetate trihydrate (pH 3.8) / ACN 90/10 (v/v) at 1.3 ml/min and 50 °C, UV detection at 226/272/259 nm. All three analytes are resolved within about 2 minutes.
Industries
Food & Beverage
Category
HPLC columns
Product
Astra C18-HE
Part number
AST-5732-IG21
Analytes
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- Caffeine CAS number 58-08-2
- Sodium benzoate CAS number 532-32-1
- Potassium sorbate CAS number 24634-61-5
