摘要
比较了2种样品前处理方法(提取液冷冻处理和提取液不做冷冻处理)对烟叶样品中多菌灵和甲基硫菌灵残留测定的影响。结果表明,提取液冷冻处理与否,对2种农药残留测定的精密度影响不大,但提取液冷冻处理与不处理对多菌灵残留测定的准确度有影响,冷冻处理提取液会降低多菌灵的回收率,使测定值偏低。对甲基硫菌灵残留测定准确度的影响则不明显。因此采用标准方法涡旋振荡提取样品农药残留时,提取液不应冷冻处理。
To evaluate the effect of two sample pretreatment methods on determination of carbendazim and thiphanatemethyl residue,freezing extract and non-freezing extract methods were compared. The results showed that the precision of two methods all met determination requirement,but freezing treatment would reduce the recovery of carbendazim,and resulted in lower determination value. Freezing treatment had no obvious effect on the recovery of thiphanate-methyl.Extraction of these two pesticide residue according to standard method should not use freeze extract.
出处
《广州化工》
CAS
2017年第22期102-103,共2页
GuangZhou Chemical Industry
基金
云南中烟工业有限责任公司科技计划资助项目(2015JC05)
关键词
多菌灵
甲基硫菌灵
农药残留
烟草
carbendazim
thiophanate-methyl
pesticide residue
tobacco
