Benzene Determination in Soft Drinks

Objectives: Benzene is a known human carcinogen. We are exposed to benzene mainly through inhalation and a lesser extent through the ingestion of food and water. Benzene is formed in beverages when ascorbic acid coexists with benzoate salts. Certain additional conditions (heat, UV light, metallic ions) are required for detectable levels of benzene to be formed. The aim of this study was to investigate soft drinks for the presence of benzene.
Methods: A GC method was developed to identify and quantify benzene in beverages. Fifteen samples containing benzoate sodium and ascorbic acid were analyzed.
Results: The benzene concentration ranged between the limit of quantification and 8.81 µg/l. The EU guideline limits the benzene concentration at 1 µg/l in drinking water; 6 of the products tested were above this admitted level.
Conclusion: Based on the presented data, the safety of benzene as a preservative agent should be reconsidered.