期刊论文

Dissipation, Residues and Dietary Risk Assessment of Tebuconazole and Azoxystrobin in Rice

中文

农药

1006-0413

2020

59

3

209-214,222

10.16820/j.cnki.1006-0413.2020.03.011

农业部农药残留试验项目(18047)。

本校为第一机构

[目的]为评价嘧菌酯和戊唑醇在水稻中的残留消解行为和产生的膳食摄入风险。[方法]采用高效液相色谱-串联质谱仪联用(HPLC-MS/MS)同时检测嘧菌酯和戊唑醇在水稻糙米、稻壳和植株中残留的分析方法。样品经乙腈提取、PSA分散固相萃取净化,高效液相色谱-串联质谱仪联用检测,外标法定量。[结果]嘧菌酯和戊唑醇在糙米、稻壳和植株中的定量限(LOQ)均为0.05 mg/kg。在0.05~5.00 mg/kg添加水平下,嘧菌酯和戊唑醇的平均回收率在70%~110%之间,相对标准偏差(RSD)在5%~15%之间。嘧菌酯在稻壳中的消解符合一级动力学方程,半衰期为3.45~5.92 d,戊唑醇在稻壳中的消解符合一级动力学方程,半衰期为7.37~11.0 d,距...

[Aims] In order to evaluate the residue behavior and dietary intake risk of the azoxystrobin and the tebuconazole applied to rice. [Methods]A novel method for the residue determination of azoxystrobin and tebuconazole in rice, rice hull and rice straw was developed by using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The samples were extracted by acetonitrile, purified by PSA dispersed solid phase extraction, detected by HPLC-MS/MS. [Results] Results showed that the limits of quantification (LOQs) in rice, rice hull and rice straw were 0.05 mg/kg. At fortified...