代谢
描述了一种用于测定尿液中N-乙酰-4,4'-亚甲基二苯胺和N-乙酰-4,4'-亚甲基-双(2-氯苯胺)的灵敏且特异的气相色谱/质谱分析。该方法基于溶剂萃取化合物以及氘标记内标物,通过毛细管气相色谱/质谱将化合物分离并检测为它们的五氟丙基衍生物。该方法已应用于检测职业暴露于4,4'-亚甲基-双(2-氯苯胺)和4,4'-亚甲基二苯胺的工人尿液中的4,4'-亚甲基-双(2-氯苯胺)和N-乙酰-4,4'-亚甲基二苯胺。结果显示,虽然N-乙酰-4,4'-亚甲基-双(2-氯苯胺)是一种相对较小的尿代谢物,但4,4'-亚甲基二苯胺的显著部分以N-乙酰化合物的形式排出。
A sensitive and specific gas chromatographic/mass spectrometric assay is described for the determination of N-acetyl 4,4'-methylene dianiline and N-acetyl 4,4'-methylene-bis(2-chloroaniline) in urine. The method is based on the solvent extraction of the compounds together with deuterium-labeled internal standards, the compounds being separated and detected by capillary gas chromatography/mass spectrometry as their pentafluoropropyl derivatives. The method has been applied to the detection of 4,4'-methylene-bis(2-chloroaniline) and N-acetyl 4,4'-methylene dianiline in the the urine of workers occupationally exposed to 4,4'-methylene-bis(2-chloroaniline) and 4,4'-methylenedianiline. The results show that while N-acetyl 4,4'-methylene-bis(2-chloroaniline) is a relatively minor urinary metabolite a significant proportion of 4,4'-methylenedianiline is excreted as the N-acetylated compound.
来源:Hazardous Substances Data Bank (HSDB)