首页> 外文期刊>Pesticidas Revista de Ecotoxicologia e Meio Ambiente >DETERMINA??O DE PESTICIDAS EM FEIJ?O POR DISPERS?O DA MATRIZ EM FASE SóLIDA (DMFS)
【24h】

DETERMINA??O DE PESTICIDAS EM FEIJ?O POR DISPERS?O DA MATRIZ EM FASE SóLIDA (DMFS)

机译:固相基质(DMFS)分散法测定豆类中的农药

获取原文
       

摘要

Desenvolveu-se metodologia analítica por dispers?oda matriz em fase sólida (DMFS) para analisarDiazinon, Propanil, Malation, Cipermetrina eDeltametrina em amostras de feij?o, testando-se ométodo em amostras comerciais. Amostras de feij?oforam trituradas em moinho de facas e uma subamostrade 5 g foi homogeneizada com 1 g dealumina neutra. O conteúdo da mistura foi transferidopara coluna DMFS e acetato de etila foi usado paraelui??o. O extrato final foi analisado em cromatógrafoa gás/espectr?metro de massa (CG/EM). Amostrasfortificadas entre 0,5 e 4,0 mg.kg-1 apresentaramvalores de recupera??o (n=3) entre 72,7% e 102,1%e média da estimativa do desvio-padr?o entre 29,4%e 44,7%. Os limites de detec??o (LD) variaram entre0,002 a 0,2 mg.kg-1 para os pesticidas estudados,portanto abaixo dos limites máximos de resíduos(LMR) permitidos pelo Codex Alimentarius. Naanálise das amostras comerciais de feij?o foramencontrados os pesticidas Diazinon, Propanil eDeltametrina em concentra??es acima LMR. Ométodo mostrou-se apropriado para pequenasquantidades de amostra, rápido e simples, compoucas etapas na prepara??o de amostra e poucoconsumo de solvente organico. DETERMINATION OF PESTICIDES IN BEANS BY MATRIX SOLID PHASE DISPERSION (MSPD) Abstract An analytical methodology based on matrix solid phase disperson (MSPD) was developed to analyse Diazinon, Propanil,Malathion, Cypermethrin and Deltamethrin in beans samples, by testing the method in commercial samples. Beans sampleswere triturated in knives mill and one sub-sample of 5 g was homogeneized with 1 g of neutral alumine. The mixturecontent was transferred to MSPD column and ethyl acetate was used for elution. The final extract was analysed by gaschromatograph/mass spectromethers (CG/MS). Fortified samples between 0.5 to 4 mg.kg-1 showed recuperation values(n=3) between 72.7% and 102.1% and the standard deviation estimative average between 29.4% and 44.7%. Thedetection limits varied between 0.002 to 0.2 mg.kg-1 for the studied pesticides, though below the maximum limits ofresidues (MLR) permitted by Codex Alimentarius. In commercial beans samples analysis the pesticides Diazinon, Propanil,Malathion, Cypermethrin and Deltamethrin were found in concentration above the MLR. The methods was appropriated forsmall sample quantities, fast and simple, with few stages in sample preparation and low use of organic solvents.
机译:通过分散固相基质(DMFS)来开发分析方法,以分析豆类样品中的二嗪农,丙炔,苹果酸,氯氰菊酯和溴氰菊酯,并在商业样品中进行测试。将豆样品在刀磨机中研磨,然后将5 g的子样品与1 g的中性氧化铝均化。将混合物的内容物转移至DMFS柱,并使用乙酸乙酯洗脱。使用气相色谱仪/质谱仪(CG / MS)分析最终提取物。在0.5至4.0 mg.kg-1之间强化的样品的回收率(n = 3)在72.7%至102.1%之间,标准偏差估计值的平均值在29.4%之间和44.7%。研究农药的检出限(LD)在0.002至0.2 mg.kg-1之间变化,因此低于食品法典允许的最​​大残留限量(MRL)。在商品豆样品的分析中,发现农药二嗪农,丙胺和溴氰菊酯的浓度均高于最大残留限量。实践证明,该方法适用于少量样品,快速简便,样品制备步骤少,有机溶剂消耗少。基质固相扩散法(MSPD)测定豆类中的农药摘要建立了一种基于基质固相扩散法(MSPD)的分析方法,通过对商品样品中的方法进行了分析,以分析豆类样品中的二嗪农,丙炔,马拉硫磷,氯氰菊酯和溴氰菊酯。 。将豆类样品在切碎机中研磨,然后用1 g中性铝将1个5 g子样品匀浆。将混合物内容物转移至MSPD柱,并使用乙酸乙酯洗脱。通过气相色谱仪/质谱仪(CG / MS)分析最终提取物。 0.5至4 mg.kg-1之间的强化样品显示回收率(n = 3)在72.7%至102.1%之间,标准偏差估计平均值在29.4%至44.7%之间。所研究农药的检出限在0.002至0.2 mg.kg-1之间变化,尽管低于食品法典允许的最​​大残留限量(MLR)。在商业豆类样品分析中,发现农药二嗪农,丙二醇,马拉硫磷,氯氰菊酯和溴氰菊酯的浓度高于MLR。该方法适用于少量样品,快速简便,样品制备步骤少,有机溶剂用量少。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号