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首页> 外文会议>Environmental security assessment and management of obsolete pesticides in Southeast Europe >Analytical Method for Determination of Some Priority Substances in Surface and Ground Water Samples by Liquid Chromatography - Mass Spectrometry
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Analytical Method for Determination of Some Priority Substances in Surface and Ground Water Samples by Liquid Chromatography - Mass Spectrometry

机译：液相色谱-质谱法测定地表水和地下水中某些优先物质的分析方法

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摘要

Chemical status of water bodies is determined through environmental quality standards, denned for priority pollutants (Directive 2008/105/EC, Off J Eur Commun, December 24, L 348/84, 2008), mostly represented by persistent organic compounds and pesticides. There is a need for precise and accurate analytical methods for reliable assessment of environmental status of surface and ground waters. The aim of this work was to develop an innovative multiresidue analytical method for simultaneous determination of some priority substances in surface and ground waters. Determined target compounds include the pesticides: Acetochlor, Alachlor, Chlorfenvinphos, Chlorpyrifos, Diuron, Isoproturon, Pendimethalin and Trifluralin. Analytical approach was based on a solid-phase extraction (SPE) as a sample pretreatment procedure and a liquid chromatography-mass spectrometry (LC-MS) as an instrumental method. Optimal chemical conditions for quantitative separation and preconcentration of the analytes in a single step extraction procedure are defined. LC-MS method performance is discussed in details. The achieved analytical recovery for all compounds was greater than 86 % and repeatability is up to 10 %. The established detection limits were ranged between 1 and 10 ng/L and the quantification limits were between 5 and 50 ng/L, respectively. The concentration levels of measured priority substances in main Bulgarian rivers were presented.
机译：水体的化学状态是通过环境质量标准确定的，该标准规定了优先污染物（第2008/105 / EC号指令，Off J Eur Commun，12月24日，L 348 / 84，2008年），主要以持久性有机化合物和农药为代表。为了精确评估地表水和地下水的环境状况，需要精确的分析方法。这项工作的目的是开发一种创新的多残留分析方法，用于同时测定地表水和地下水中的某些优先物质。确定的目标化合物包括杀虫剂：乙草胺，甲草胺，氯芬灭磷，毒死rif，敌草隆，异丙隆，戊二甲灵和三氟拉林。分析方法基于固相萃取（SPE）作为样品预处理程序，液相色谱-质谱（LC-MS）作为仪器方法。定义了在一步萃取过程中定量分离和预浓缩分析物的最佳化学条件。详细讨论了LC-MS方法的性能。所有化合物的分析回收率均大于86％，重复性高达10％。既定的检测限为1到10 ng / L，定量限为5到50 ng / L。介绍了保加利亚主要河流中被测优先物质的浓度水平。

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