A gas chromatographic method was developed for the quantitation of BHA and BHT in toluene plus 2‐propanol extracts of chewing gum samples. The method uses a thick film (1.0 micron) bonded fused silica open tubular capillary column which resolves antioxidants from flavor oil volatiles and gum base components as confirmed by mass spectral analysis. The chromatographic method is reproducible at 4.0 ppm and detects as little as 2.0 ppm. Regression analysis of antioxidant‐biphenyl internal standard peak area ratios to antioxidant concentrations resulted in a highly linear equation with a correlation coefficient (R) of 0.99 for the 10 ‐ 150 ppm range.
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Greenberg et al. (1984) studied this question.
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