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首页> 外文期刊>International journal of environmental analytical chemistry >MULTI-RESIDUE ANALYSIS OF 66 BIOCIDES IN RIVER WATER, RIVER SEDIMENT AND SUSPENDED SOLIDS SAMPLES BY GAS CHROMATOGRAPHY-MASS SPECTROMETRY
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MULTI-RESIDUE ANALYSIS OF 66 BIOCIDES IN RIVER WATER, RIVER SEDIMENT AND SUSPENDED SOLIDS SAMPLES BY GAS CHROMATOGRAPHY-MASS SPECTROMETRY

机译：气相色谱-质谱法对河流水，沉积物和悬浮液中的66种杀生物剂进行多残留分析

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摘要

A multi-residue method for the screening and analysis of 66 common pesticides from hydrological samples, including sediment, suspended solids and water is presented. The investigated pesticides belong to the following chemical classes: polychlorinated organic compounds, triazine- and chloroacetanilide herbicides, organo-phosphorous insecticides and miscellaneous. The method includes fluidized-bed and microwave-assisted extraction for solid samples and solid-phase extraction on C_(18)-cartridges for water samples, followed by a combined purification-separation step on adsorption chromatography using open silica gel columns. Two fractions were eluted separating the 66 analytes into the non-polar and the more polar compounds. All ana-lytes were identified and quantified by gas chromatography coupled with mass spectrometry in selected ion monitoring mode. The method was characterized by recovery experiments and statistical methods and finally applied to environmental river samples during a one-year monitoring program. This method allowed the screening and measurement of the contaminants in all parts of Liao-He and Yangtse rivers (Eastern China) at levels as low as 0.07 ng/L resp. 0.7 ng/L for hexachlorobenzene, with a precision better than 20%.
机译：提出了一种从水文样品中筛选和分析66种常见农药的多残留方法，包括沉积物，悬浮固体和水。被调查的农药属于以下化学类别：多氯化有机化合物，三嗪和氯乙酰苯胺除草剂，有机磷杀虫剂和其他。该方法包括：对固体样品进行流化床和微波辅助萃取，对水样品在C_（18）柱上进行固相萃取，然后使用开放式硅胶柱在吸附色谱上进行组合的纯化分离步骤。洗脱两部分，将66种分析物分离为非极性和极性更大的化合物。在选定的离子监测模式下，通过气相色谱与质谱联用对所有分析物进行鉴定和定量。该方法通过回收实验和统计方法进行了表征，并最终在一年的监测计划中应用于环境河流样本。这种方法可以筛查和测量辽河和长江（中国东部）所有地区的污染物，其浓度低至0.07 ng / L。六氯苯的浓度为0.7 ng / L，精度优于20％。

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