水包油乳液中苯乙烯/乙苯混合物的味觉相互作用。
Taste interaction of styrene/ethylbenzene mixtures in an oil-in-water emulsion.
作者信息
Janssens J L, Diekema N W, Reitsma J C, Linssen J P
机构信息
Department of Food Science, Wageningen Agricultural University, The Netherlands.
出版信息
Food Addit Contam. 1995 Mar-Apr;12(2):203-9. doi: 10.1080/02652039509374295.
Styrene and ethylbenzene are present in detectable amounts in polystyrene packaging materials and migration of these compounds may cause a taint of the packed food. The effect of mixtures of styrene and ethylbenzene on the detection threshold concentration in a 5% oil-in-water emulsion was investigated with the constant stimulus differences test. The detection threshold concentrations of the individual compounds in the emulsion were found to be 1.0 ppm for styrene and 3.0 ppm for ethylbenzene. Linear regression of the percentages of correct answers and the logarithm of the sum of the concentrations of both compounds in the mixtures expressed as fractions of their threshold concentration gave the following relationship: % of correct answers = 42.5 x log (sum of threshold fractions) +74.8 (r = 0.87). Calculation of the sum of threshold fractions at the 75% point of correct answers gave a value of 1.0, which clearly indicates that the effect of mixing of styrene and ethylbenzene is additive at sub-threshold levels in a 5% oil-in-water emulsion.
聚苯乙烯包装材料中存在可检测量的苯乙烯和乙苯，这些化合物的迁移可能会导致包装食品产生异味。采用恒定刺激差异试验研究了苯乙烯和乙苯混合物对5%水包油乳液中检测阈值浓度的影响。发现乳液中各化合物的检测阈值浓度分别为：苯乙烯1.0 ppm，乙苯3.0 ppm。以混合物中两种化合物浓度之和相对于其阈值浓度的分数表示，正确答案百分比与该分数对数之间的线性回归得出以下关系：正确答案百分比=42.5×log（阈值分数之和）+74.8（r=0.87）。在正确答案为75%时计算阈值分数之和，得出值为1.0，这清楚地表明在5%水包油乳液中，低于阈值水平时苯乙烯和乙苯混合的影响是相加的。
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