代谢
beta-羟乙氧基乙酸,而不是草酸或二甘醇酸,是大鼠体内二恶烷的主要尿液代谢物。通过口服插管给两只大鼠灌输了统一标记的(14)C二恶烷。收集并分析了复合24小时尿液样本中的代谢物,使用薄层离子交换柱色谱、气相色谱-质谱和核磁共振光谱法。通过薄层色谱确认了一个主要和两个次要的含(14)C化合物。两个次要化合物与(14)C二恶烷和(14)C二乙二醇相同。使用其他四种分析方法将主要化合物鉴定为beta-羟乙氧基乙酸。beta-羟乙氧基乙酸约占尿液中放射活性的大约85%,二恶烷和二乙二醇占剩余的15%。/二恶烷/
beta-Hydroxyethoxyacetic acid, rather than oxalic acid or diglycolic acid, was the major urinary metabolite of dioxane in rats. Uniformly labeled (14)C dioxane was administered to two rats by oral intubation. Composite 24 hr urine samples were collected and analyzed for metabolites using thin layer ion exchange column chromatography and gas chromatography-mass spectrometry, and by nuclear magnetic resonance spectroscopy. One major and two minor (14)C containing compounds were confirmed by thin layer chromatography. The two minor compounds were identical to (14)C dioxane and (14)C diethylene glycol. The major compound was identified as beta-hydroxyethoxyacetic acid using the other four analytical methods. beta-Hydroxyethoxyacetic acid accounted for approximately 85% of the radioactivity in the urine, with dioxane and diethylene glycol accounting for the remaining 15%. /Dioxane/
来源:Hazardous Substances Data Bank (HSDB)