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首页> 外文期刊>Journal of the Brazilian Chemical Society >Determination of pesticide residues in tomato using dispersive solid-phase extraction and gas chromatography/ion trap mass spectrometry
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Determination of pesticide residues in tomato using dispersive solid-phase extraction and gas chromatography/ion trap mass spectrometry

机译：分散固相萃取-气相色谱/离子阱质谱法测定番茄中的农药残留

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Tomato crop is frequently damaged by diseases, pests and abiotic stresses, resulting in lower yielding and loss of fruit quality. The intensive use of pesticides in tomatoes without observation of good agriculture practices and regulations has caused great concern with a probable final product contamination. The QuEChERS method of sample preparation was used for the determination of six pesticides (buprofezin, carbofuran, endosulfan-α, endosulfan-β, endosulfan sulfate and monocrotophos) in thirty three tomato samples collected from local market retailers. The method involved extraction with acetonitrile, liquid-liquid partition with addition of MgSO4 and NaCl followed by dispersive solid phase extraction using primary secondary amine sorbent and the analyses were carried out with a gas chromatography/mass spectrometry equipment by ion trap. Recovery studies for different pesticides ranged from 71 to 111% and the relative standard deviation (RSD) was below 15%. No pesticide residue was detected (> LOD) among the thirty three tomato samples analysed.
机译：番茄作物经常因疾病，病虫害和非生物胁迫而受损，导致单产降低和果实品质下降。在未遵守良好农业规范的情况下，在番茄中大量使用农药引起了人们对最终产品可能受到污染的担忧。样品制备的QuEChERS方法用于测定从当地市场零售商那里收集的33份番茄样品中的六种农药（丁丙苯丙嗪，呋喃丹，硫丹-α，硫丹-β，硫丹硫酸和久效磷）。该方法包括用乙腈萃取，添加MgSO4和NaCl的液-液分配，然后使用伯仲胺吸附剂进行分散固相萃取，并使用气相色谱/质谱仪通过离子阱进行分析。不同农药的回收率研究范围为71％至111％，相对标准偏差（RSD）低于15％。在分析的33个番茄样品中未检测到任何农药残留（> LOD）。

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