4-アミノアンチピリンによるクロルフェノール類の定量 (第1報)
食品中のTrimethyl-lauryl-ammonium-2, 4, 5-trichlorophenoxideの定量
1964 年 5 巻 5 号 p. 372-378
詳細
1964 年 5 巻 5 号 p. 372-378
Determination of trimethyl-lauryl-ammonium-2, 4, 5-trichlorophenoxide in food was studied and the colorimetric method was established. Its principle is based on the oxidative condensation of 2, 4, 5-trichlorophenol, produced from trimethyl-lauryl-ammonium-2, 4, 5-trichlorophenoxide in food by steam distillation, with 4-aminoantipyrine in pH 7.8 phosphate buffered medium to yield an indophenol type pigment.
Residual trimethyl-lauryl-ammonium-2, 4, 5-trichlorophenoxide in the fruit of Citrus natsudaidai HAYATA which had been soaked in 10v/v% ethanolic aqueous solution containing 500ppm of it for one hour, was determined according to the authors' method.
3-10 days after soaking, the amount of residual trimethyl-lauryl-ammonium-2, 4, 5-trichlorophenoxide was not detected in the fruit (except peel and seed), but 16-22ppm of it was found in the peel of Citrus natsasdaidai HAYATA.
