| 分光光度法检测茶叶中含氰根菊酯类的农药残留 |
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| 引用本文： | 王丹红,蔡春平,陈祥明,王家颖.分光光度法检测茶叶中含氰根菊酯类的农药残留[J].福建分析测试,2010,19(1):73-75. |
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| 作者姓名： | 王丹红 蔡春平 陈祥明 王家颖 |
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| 作者单位： | 1. 福建出入境检验检疫局技术中心,福建福州,350001
2. 福建农林大学食品科学学院,福建福州,350002 |
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| 摘 要： | 本文以茶叶中较普遍存在的含氰根的拟除虫菊酯为研究对象,茶叶中含氰根的拟除虫菊酯农药经碱解后产生氰化物,加入强酸后生成氢氰酸,采用通入氮气将氢氰酸导入吸收液中显色,然后在545nm处用分光光度计测定,该方法检出限为0.4μg/g,RSD小于6%,回收率为73%～128%。该方法具有简便、快速和低成本,从而实现基层实验室和产地现场对茶叶中该类农药残留的快速筛查。
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| 关 键 词： | 分光光度法 茶叶 含氰根拟除虫菊酯 残留 |
Determination of Containing Cyanogen of Pyrethroid Pesticide Residues in Tea by UV Spectrometer |
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| Wang dan-hong,Cai chun-ping,Chen xiang-ming,Wang jia-ying.Determination of Containing Cyanogen of Pyrethroid Pesticide Residues in Tea by UV Spectrometer[J].Fujian Anal Ysis & Testing,2010,19(1):73-75. |
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| Authors: | Wang dan-hong Cai chun-ping Chen xiang-ming Wang jia-ying |
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| Affiliation: | 1.Fujian Entry-exit Inspection and Quarantine Bureau;Fuzhou;Fujian 350001;China;2.College of Food Science of Fujian Agriculture and Forestry University;Fujian 350002;China |
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| Abstract: | Containing cyanogen of pyrethroid pesticides residues are the research object of this paper. Containing cyanogen of pyrethroid pesticides in the saalple are decomposed to cyanidel by alkali.,then adding strong acid to s.mple creates hydrcocyanic acid .Hydrocyanic acid is carried by nitrogen to the absorption color solution. It is detected by eolorimetrie assay. The detection limit was 0.4μg/g, the RSD was not more than 6% and the recovery rate was 73% - 128%. The method is credible, simple, rapid and low-cost, and is accepting to rapid detection of containing cyanogen of pyrethroid pesticides residues in tea. |
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| Keywords: | Spectrophotometry tea containing cyanogen of pyrethroid pesticides residues |
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