Abstract
Abstract A procedure is presented for the determination of brominated vegetable oils in soft drinks by a combination of total bromide estimation and gas-liquid chromatography (GLC). The method for bromide estimation involves conversion of organic bromide to inorganic bromide by potassium hydroxide fusion, followed by iodometric titration of the inorganic bromide. The bromide content of several common brominated oils ranged from 33.5% (olive) to 43.9% (soybean). Recoveries, based on bromide content, on an orange drink fortified with brominated sesame oil in the range 1–25 mg/10 fluid oz were 94.3–97.5%. Used alone, this technique will not provide accurate brominated oil determination unless the identity of the oil is known. The latter can be deduced from GLC. The analysis of 6 citrus-based soft drinks, using the combined procedures, showed that 5 drinks contained brominated oil in the range 3.1–5.2 mg/10 fluid oz; none was detected in the other drink.
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