ISO 23646:2022 土壤质量 用带质量选择检测（GC-MS）的气相色谱法和带电子捕获检测（GC-ECD）的气相色谱法测定有机氯农药

标准编号：ISO 23646:2022

中文名称：土壤质量 用带质量选择检测（GC-MS）的气相色谱法和带电子捕获检测（GC-ECD）的气相色谱法测定有机氯农药

英文名称：Soil quality — Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron-capture detection (GC-ECD)

发布日期：2022-01

标准范围

本文件规定了使用GC-MS和GC-ECD定量测定土壤和沉积物中有机氯农药（OCPs）和半挥发性氯苯的方法。检测限和应用限取决于决定因素、样本摄入量、使用的设备、用于提取样本和清除提取物的化学品的质量。在本文件规定的条件下，土壤的施用下限为1μg/kg（以干物质表示），沉积物的施用下限为10μg/kg（以干物质表示）。达到这些应用下限的必要性取决于分析顺序和当前极限值。土壤和沉积物的性质以及OCP的预期污染水平和干扰物质的存在可能有所不同。这些差异使我们无法描述一个通用程序。根据样品的性质，本文件包含有关干燥、提取和清理程序的决策表。这种方法是基于性能的。如果满足该方法中给出的所有性能标准，则可以修改该方法。在适当的内部验证实验证明适用性的情况下，该方法可用于分析范围内未规定的其他氯化化合物。注？验证数据见附录A。本文件仅针对α-HCH、β-HCH、γ-HCH、δ-HCH、o、p′-DDE、p、p′-DDE、o、p′-DDD、p、p′-DDD、o、p′-DDT和p、p′-DDT进行验证。对于沉积物，显示使用ECD检测测量的数据。根据本文件的方法，ECD和MS数据的可比性在其他矩阵上得到了证明。

This document specifies a method for quantitative determination of organochlorine pesticides (OCPs) and semi-volatile chlorobenzenes in soil and sediment, using GC-MS and GC-ECD.The limit of detection and the limit of application depends on the determinants, the sample intake, the equipment used, the quality of chemicals used for the extraction of the sample and the clean-up of the extract.Under the conditions specified in this document, lower limits of application from 1 μg/kg (expressed as dry matter) for soils to 10 μg/kg (expressed as dry matter) for sediments can be achieved. The necessity to achieve these lower limits of application depends on the analyses order and the current limit values.Soils and sediments can differ in properties as well as in the expected contamination levels of OCPs and the presence of interfering substances. These differences make it impossible to describe one general procedure. Based on the properties of the samples, this document contains decision tables regarding drying-, extraction- and clean-up procedures. This method is performance based. The method can be modified if all performance criteria given in this method are met.The method can be applied to the analysis of other chlorinated compounds not specified in the scope in cases where suitability has been proven by proper in-house validation experiments.NOTE       The validation data are shown in Annex A. This document is validated only for α-HCH, β-HCH, γ-HCH, δ-HCH, o,p′-DDE, p,p′-DDE, o,p′-DDD, p,p′-DDD, o,p′-DDT and p,p′-DDT. For sediments, data are displayed measured using an ECD detection. The comparability of ECD and MS data in terms of the approach of this document was demonstrated on additional matrices.

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