碳納米管改進(jìn)OuEChERS技術(shù)應(yīng)用于氣相色譜法檢測(cè)果蔬中5種農(nóng)藥殘留

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Improved QuEChERS Technology Using Carbon Nanotubes for Gas Chromatography Detection of Five Pesticide Residues in Fruits and Vegetables

ZI Qinjiang'， ZHAO Wenying2，WANG Jin3* （l.Eryuan CountyInspectionand Testing Institute，Eryuan 6712oo， China;

2.Lijiang Inspection， Examination and Certification Institute，Lijiang 6741Oo， China;

3.Yunnan Vocational and Technical College of Agriculture， Kunming 65oo31， China）

Abstract： Objective： To establish a QuEChERS technique based on multi-waled carbon nanotubes and combined with gas chromatography for detecting residues of five pesticides， namely oxytetracycline， methyl parathion，chlorpyrifos，azithromycin，and triazophos，in fruits and vegetables.Method： Multi walled carbon nanotubes were used as solid phase extractant，and the QuEChERS pretreatment technology was improved， including optimizing the extraction method， extraction solvent， eluent， and dosage of multi walled carbon nanotubes. Gas chromatography was used to quantitatively determine five pesticide residues.Result： The five pesticides showed a good linear correlation between 0.01mg-L-1 and 0.20mg-L-1 ，with a correlation coefficient of ? 0.999 0 The detection limit was between 2.25×10-3mg.kg-1 and 1.76×10-2mg?kg-1 ， and the spiked recovery rate was 79.3% to 99.5% ； the relative standard deviation is 0.4% to 3.9% .Conclusion： This method has simple sample pretreatment， short analysis time，highaccuracyandsensitivity，and can be used forrapid and accurate detection offive pesticide residues in fruits and vegetables，providing reliable technical supportfor ensuring the qualityand safetyofagricultural products.

Keywords： QuEChERS; multi-walled carbon nanotubes; pesticide residues

分析檢測(cè)

農(nóng)藥殘留分析是一種在復(fù)雜基質(zhì)混合物中提取并定量分析痕量化合物的技術(shù)，樣品前處理作為農(nóng)藥殘留分析中的關(guān)鍵步驟，對(duì)靈敏度、可靠性、分析速度、選擇性具有直接影響，是當(dāng)前該領(lǐng)域的重要研究方向之一[。（剩余5400字）