除虫脲在荔枝上残留及安全评价
【目的】对除虫脲在荔枝上的安全性进行评价,为该药在荔枝上的合理使用提供科学依据。【方法】通过建立除虫脲在荔枝全果和果肉的前处理方法和液相色谱—二级管阵列紫外检测器的仪器方法,对除虫脲进行定量分析;通过两年(2013-2014年)两地(广东、广西)的残留试验,研究除虫脲在荔枝上的残留及消解动态。【结果】除虫脲在荔枝果肉和全果上平均回收率分别为84.1%-84.8%和82.7%-84.9%,相对标准偏差分别为2.9%-4.3%和3.2%-4.2%,最小检出量为5×10^-10 g,在荔枝全果和果肉上的最低检测浓度均为0.01 mg/kg。除虫脲在荔枝上的消解半衰期为3.5-4.9 d;以125.0...
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Published in | 南方农业学报 Vol. 47; no. 11; pp. 1880 - 1884 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
广东省农业科学院 植物保护研究所/广东省植物保护新技术重点实验室,广州,510640
2016
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Subjects | |
Online Access | Get full text |
ISSN | 2095-1191 |
DOI | 10.3969/jissn.2095-1191.2016.11.1880 |
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Summary: | 【目的】对除虫脲在荔枝上的安全性进行评价,为该药在荔枝上的合理使用提供科学依据。【方法】通过建立除虫脲在荔枝全果和果肉的前处理方法和液相色谱—二级管阵列紫外检测器的仪器方法,对除虫脲进行定量分析;通过两年(2013-2014年)两地(广东、广西)的残留试验,研究除虫脲在荔枝上的残留及消解动态。【结果】除虫脲在荔枝果肉和全果上平均回收率分别为84.1%-84.8%和82.7%-84.9%,相对标准偏差分别为2.9%-4.3%和3.2%-4.2%,最小检出量为5×10^-10 g,在荔枝全果和果肉上的最低检测浓度均为0.01 mg/kg。除虫脲在荔枝上的消解半衰期为3.5-4.9 d;以125.0-187.5 mg/kg剂量、施用3-4次,采收间隔期为7和10 d时,荔枝果肉上的残留量均小于0.01 mg/kg,全果上的残留量分别为0.05-0.23和0.01-0.05 mg/kg。【结论】除虫脲在荔枝上防治荔枝蒂蛀虫时施用剂量以125.0 mg/kg为宜,施药次数3次,安全间隔期10 d。 |
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Bibliography: | 45-1381/S LIU Yan-ping, WANG Si-wei, SUN Hai-bin (Institute of Plant Protection, Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, China) Objective]Safety of diflubenzuron in litchi was evaluated, in order to provide a scientific basis for ratio-nal use of diflubenzuron in litchi production . [Method]An effective method was developed for quantitative analysis of diflubenzuron by HPLC-PDA(high performance liquid chromatography with photo-diode array) in whole fruit and flesh of litchi. Terminal residue and degradation dynamics of diflubenzuron in litchi were studied in Guangdong and Guangxi during 2013-2014. [Result]Results showed that, spiked recoveries of diflubenzuron in whole fruit and flesh of litchi were 84.1%-84.8% and 82.7%-84.9%, respectively, with relative standard deviations of 2.9%-4.3% and 3.2%-4.2%. Limit of detection(LOD) was 5×10^-10 g, and limit of quantification(LOQ) was 0.01 mg/kg in whole fruit and flesh. Half life o |
ISSN: | 2095-1191 |
DOI: | 10.3969/jissn.2095-1191.2016.11.1880 |