CAJ | 학술논문

采用液相色谱-串联质谱法(LC-MS/MS)研究了甲萘威在棉花和土壤中的残留消解动态，为棉花上甲萘威的安全使用提供科学依据。样品经甲醇＋二氯甲烷(体积比1∶99)提取，氨基固相萃取柱净化，后经LC-MS/MS测定其残留量。甲萘威在棉叶上的半衰期为1.1～1.9 d；在土壤中的半衰期为4.3～6.2 d。试验条件下，甲萘威在收获前14 d、收获前7 d、收获期棉籽中的残留量≤0.023 mg/kg。建议30%聚醛·甲萘威颗粒剂在推荐剂量下最多施药1次，采收间隔期为7 d。
채용액상색보-천련질보법(LC-MS/MS)연구료갑내위재면화화토양중적잔류소해동태，위면화상갑내위적안전사용제공과학의거。양품경갑순＋이록갑완(체적비1∶99)제취，안기고상췌취주정화，후경LC-MS/MS측정기잔류량。갑내위재면협상적반쇠기위1.1～1.9 d；재토양중적반쇠기위4.3～6.2 d。시험조건하，갑내위재수획전14 d、수획전7 d、수획기면자중적잔류량≤0.023 mg/kg。건의30%취철·갑내위과립제재추천제량하최다시약1차，채수간격기위7 d。
In order to provide scientific basis for the safe use of carbaryl on cotton, the degradation dynamics of carbaryl in cotton and soil were studied by LC-MS/MS. The sample was extracted with methanol + dichloromethane (volume ratio of 1:99), cleaned up by amino solid phase extraction column, then determined by LC-MS/MS. The results showed that the half-lives of carbaryl in cotton leaf and soil were 1.1-1.9 days and 4.3-6.2 days, respectively. The final residues in cotton seed were all under 0.023 mg/kg. The results suggested that metaldehyde + carbaryl 30% GR could be used in cotton field at most one time and the pre-harvest interval should be 7 days.