印楝素在甘蓝及土壤中的消解动态

【目的】甘蓝Brassica oleracea生长期施用w为0.3%的印楝素乳油,检测印楝素在甘蓝和土壤中的残留及消解动态。【方法】印楝素在0.05～5.00 mg·kg^-1水平范围内取0.1、0.5、1.0 mg·kg^-1添加,样品中的印楝素经乙腈超声波辅助提取,弗罗里硅土固相萃取柱净化,高效液相色谱（HPLC）检测,外标法定量。【结果】印楝素在甘蓝中的平均回收率为88.52%～93.21%,相对标准偏差为2.75%～3.55%;在土壤中平均回收率为90.69%～93.32%,相对标准偏差为2.09%～3.46%。印楝素在甘蓝中的残留半衰期为0.89 d,在土壤中的残留半衰期为2.40...

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Published in华南农业大学学报 Vol. 38; no. 4; pp. 37 - 40
Main Author 杨晓云 黄其亮 江腾辉 徐汉虹
Format Journal Article
LanguageChinese
Published 天然农药与化学生物学教育部重点实验室/华南农业大学 农学院,广东 广州,510642%广东省环境保护职业技术学校,广东 广州,510655%广东省农业有害生物预警防控中心,广东 广州,510500 2017
Subjects
乳油
农药残留
印楝素
土壤
甘蓝
高效液相色谱
azadirachtin
农药残留
cabbage
pesticide residue
印楝素
emulsifiable concentrate
高效液相色谱
soil
甘蓝
HPLC
乳油
土壤
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ISSN1001-411X
DOI10.7671/j.issn.1001-411X.2017.04.006

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Summary:【目的】甘蓝Brassica oleracea生长期施用w为0.3%的印楝素乳油,检测印楝素在甘蓝和土壤中的残留及消解动态。【方法】印楝素在0.05～5.00 mg·kg^-1水平范围内取0.1、0.5、1.0 mg·kg^-1添加,样品中的印楝素经乙腈超声波辅助提取,弗罗里硅土固相萃取柱净化,高效液相色谱（HPLC）检测,外标法定量。【结果】印楝素在甘蓝中的平均回收率为88.52%～93.21%,相对标准偏差为2.75%～3.55%;在土壤中平均回收率为90.69%～93.32%,相对标准偏差为2.09%～3.46%。印楝素在甘蓝中的残留半衰期为0.89 d,在土壤中的残留半衰期为2.40 d。【结论】印楝素属易降解农药。该施药方法安全可靠,值得借鉴。
Bibliography:44-1110/S
azadirachtin ; emulsifiable concentrate ; cabbage ; soil ; pesticide residue ; HPLC
Objective】To identify the residual and degradation dynamics of azadirachtin in cabbage and soil after spraying 0.3%azadirachtin emulsifiable concentrate during the growth period of cabbage （Brassica oleracea）.【Method】Azadirachtin was added with three concentrations of 0.1,0.5 and 1.0 mg·kg^-1 within the range from 0.05 to 5.00 mg·kg^-1. Azadirachtin was extracted from cabbage and soil using acetonitrile assisted with ultrasonic, purificated using a florisil solid phase extraction column, detected by HPLC and quantified by external standard method.【Result】The average recovery rates of azadirachtin in cabbage ranged from 88.52% to 93.21% with relative standard deviations ranging from 2.75% to 3.55%, and the average recovery rates in soil were ranged from 90.69% to 93.32% with relative standard deviations ranging from 2.09% to 3.46%.The half lives of azadirachtin in cabbage and soil were 0.89 and 2.40 d respectively.【Con
ISSN:1001-411X
DOI:10.7671/j.issn.1001-411X.2017.04.006