代谢
在给予碳基-(14)C标记的丁硫克百威后48小时内,大鼠通过呼出超过60%的(14)C作为二氧化碳,尿液中发现的不到30%。在其他(14)C研究中,大鼠通过尿液排出了超过80%的降解产物,通过粪便排出的不到10%(这种排泄模式有利于葡萄糖苷酸的内脏-肝脏循环,这也可以帮助延长有毒代谢物的系统活性)。主要的尿液代谢物是丁硫克百威亚砜(剂量的40%),其肟和腈形式(超过30%);亚砜和相关的肟和腈;以及,醛和酸类似物。丁硫克百威在排泄物中不常见。摄入植物组织的结合残留物未被吸收,因此可以在粪便中找到。在单次剂量和短期饮食研究中,哺乳期奶牛以与大鼠相同的速度并以相同的代谢物阵列排出了丁硫克百威代谢物。大约1%的剂量通过牛奶排出,亚砜和亚砜分别是总牛奶残留含量的15%和4%的主要代谢物。
Within 48 hours of administration of carbonyl-(14)C labelled aldicarb rats eliminated over 60% of the (14)C as carbon dioxide, less than 30% was found in the urine. In other (14)C-studies rats excreted more than 80% of the degradation products in urine and less than 10% in faeces (an excretion pattern favoured by enterohepatic cycling of glucuronides which may also serve to extend the systemic activity of the toxic metabolites). The major urinary metabolites were aldicarb sulfoxide (40% of the dose), its oxime and nitrile forms (over 30%); the sulfone and related oxime and nitrile; and, the aldehyde and acid analogues. Aldicarb is not commonly found in the excreta. Bound residues of ingested plant tissues are not absorbed and therefore are found in the faeces. In single dose and short-term diet studies, lactating cows eliminated aldicarb metabolites as rapidly as rats and in the same array of metabolites. Approximately 1% of the dose was excreted in the milk, sulfone and sulfoxide were the major metabolites at 15 and 4% of the total milk residue content respectively.
来源:Hazardous Substances Data Bank (HSDB)