摘要
[目的]系统地研究吡唑醚菌酯农药在玉米及土壤中的残留量,促进安全生产。[方法]建立吡唑醚菌酯在玉米、植株和土壤中残留的固相萃取-高效液相色谱分析方法,研究宁夏及黑龙江两地玉米、土壤中吡唑醚菌酯残留状况和消解动态规律。开展不同填料的固相萃取小柱净化效果的试验,采用高效液相色谱(HPLC)检测。[结果]以弗罗里硅固相萃取柱净化样品的效果最好,在质量分数0.02~0.5 mg/kg的添加水平下,玉米、植株和土壤中吡唑醚菌酯的回收率为92%~108%,变异系数为3.2%~9.4%。消解动态试验表明:吡唑醚菌酯在宁夏、黑龙江两地土壤中的半衰期为24.8、10.2 d。[结论]采用种子包衣的施药方式,消解动态试验的植株及最终残留试验的玉米、植株、土壤中均未检出吡唑醚菌酯,该施药方式安全。
[Aims] In order to systematically study pyraclostrobin residues in maize and soil, and to promote the safety production. [Methods] The method for determination of pyraclostrobin in maize, plant and soil by high performance liquid chromatography with solid phase extraction was established. The purification effects of samples on a few kinds of columns were investigated, the residue and digestion dynamics of pyraclostrobin in maize and soil in Ningxia and Heilongjiang were studied. [Results] Under the optimized condition with the Florisil-SPE column, the recoveries of pyraelostrobin in maize, plant and soil were 92-108% and the coefficient of variation was 3.2-9.4% at the addition levels of 0.02-0.5 mg/kg, the half-lives of pyraclostrobin in soil in Ningxia and Heilongjiang were 24.8 and 10.2 d, respectively. [Conclusions] By seed coating applicator way, pyraclostrobin in the maize plant was not detected, the final residues of pyracl0strobin in maize, plant, soil were not detected. The mode of application is safe.
出处
《农药》
CAS
CSCD
北大核心
2017年第7期515-517,共3页
Agrochemicals
基金
农业部农药残留资助项目(2014F273)
