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气相色谱法测定番茄中10种菊酯类农药残留

2016-10-20贾晓菲魏荣李盛安曾峰景张益文高洁

现代农业科技 2016年6期

贾晓菲 魏荣 李盛安 曾峰景 张益文 高洁

摘要 采用气相色谱分析技术,建立了检测番茄中百菌清、腐霉利、硫丹、联苯菊酯、甲氰菊酯、氯氟氰菊酯、氟氯氰菊酯、氯氰菊酯、氰戊菊酯和溴氰菊酯共10种菊酯类农药残留的方法。结果表明:10种菊酯类农药在16 min内均能良好分离,线性良好,相关系数不低于0.995,添加回收率在86.5%~106.8%之间,相对标准偏差为4.8%~11.6%,方法检出限为0.0002~0.002 0 mg/kg。该方法快速方便、精确度好、灵敏度高,能够满足残留分析的要求。

关键词 气相色谱法;番茄;菊酯类农药;残留量;检测方法

中图分类号 S482.99 文献标识码 A 文章编号 1007-5739(2016)06-0135-02

Determination of 10 Kinds of Pyrethroid Pesticides Residue in Tomato by Gas Chromatography

JIA Xiao-fei WEI Rong LI Sheng-an ZENG Feng-jing ZHANG Yi-wen GAO Jie

(Zhongshan Quality Supervision & Inspection Institute of Agricultural Products in Guangdong Province,Zhongshan Guangdong 528400)

Abstract A analysis method for determining 10 kinds of pyrethroid pesticides residues,including cholrothalonil,procymidone,endosulfan,bifenthrin,fenpropathrin,lambda-cyhalothrin,cyfluthrin,cypermethrin,fenvalerate,deltamethrin in tomato by gas chromatograph was established. The results showed that the ten pyrethroid pesticides could be well separated within 16 min,the calibration curves were in good linearity with correlation coefficients not less than 0.995. The recovery range was 86.5%~106.8% with relative standard deviations of 4.8%~11.6%,the detection limit was 0.0002~0.002 0 mg/kg. This method was quick,simple,accurate and sensitive,and it could fit for the requirements of residue analysis.

Key words gas chromatography;tomato;pyrethroid pesticides;residue;determination method

番茄,別名西红柿、番柿、洋柿子等,原产自南美,目前我国已成为番茄的主要生产地之一。番茄不仅外观漂亮、口感好,而且营养丰富,富含矿物质、多种维生素、膳食纤维、番茄红素等营养物质。研究发现,番茄在保健养生和防治多种疾病中都有着重要的价值,如促进消化吸收、防治心血管疾病、抗癌、防衰老、护肝抗疲劳、促进骨骼发育、治疗皮肤疾病等功效,因而深受人们的喜爱,消费市场巨大[1-2]。由于番茄在生长期间极易受到病虫害的干扰[3],因此农户在种植过程中经常会喷洒以杀虫剂为主的,具有高效、广谱、低毒等特点的菊酯类农药。然而,菊酯类农药在蔬果上的残留物会在作物和动物体内富集,严重影响人们的身体健康。随着生活水平的不断提高,食品安全问题和无公害绿色农产品已日渐引起人们的重视,人们对农药残留限量的要求也更为严格[4]。……

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