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首页> 外文期刊>International journal of environmental analytical chemistry >Fast determination of β-endosulfan, α-hexachlorocyclohexane and pentachlorobenzene in the river water from northeast of China
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Fast determination of β-endosulfan, α-hexachlorocyclohexane and pentachlorobenzene in the river water from northeast of China

机译：东北地区河水中β-硫丹，α-六氯环己烷和五氯苯的快速测定

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A magnetic solid-phase extraction method for the preconcentration of three organochlorine pesticides (OCPs) from water samples has been proposed, based on magnetic phosphatidylcholine (MPC) as adsorbents. The extraction procedure was carried out in a single step by stirring the mixture of MPC and water samples. Subsequently, the MPC was collected by an external magnetic field without additional centrifugation or filtration. The analytes were desorbed from the MPC and finally analysed by gas chromatography-tandem mass spectrometry. The influence of various parameters on OCPs recoveries was studied. Results show that phosphatidylcholine amount and extraction time were critical in enhancing extraction performance, and the presence of humic acid was shown to significantly reduce the extraction efficiency. The limits of detection obtained were in the range of 0.1-0.15ng L-1. Recoveries of spiked water samples ranged from 76.2% to 101.5% with relative standard deviations varying from 3.8% to 7.7%. The proposed method was employed for analysis of pentachlorobenzene, -hexachlorocyclohexane and -endosulfan in the surface water from two rivers in northeast China.
机译：提出了一种以磁性磷脂酰胆碱（MPC）为吸附剂的磁性固相萃取法从水样中预浓缩三种有机氯农药（OCPs）的方法。通过搅拌MPC和水样品的混合物，一步即可完成提取过程。随后，无需外部离心或过滤即可通过外部磁场收集MPC。将分析物从MPC解吸，最后通过气相色谱-串联质谱分析。研究了各种参数对OCP回收率的影响。结果表明，磷脂酰胆碱的数量和提取时间对提高提取性能至关重要，腐殖酸的存在会显着降低提取效率。获得的检测极限在0.1-0.15ng L-1的范围内。加标水样的回收率为76.2％至101.5％，相对标准偏差为3.8％至7.7％。该方法用于分析东北两条河流地表水中的五氯苯，-六氯环己烷和-硫丹。

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