本文件规定了一种方法，用于定量测定碳键范围为n-C10至n-C13（含）的短链多氯化正构烷烃（简称短链氯化石蜡）的总量，以及氯质量分数（“含量”）在50%至67%之间的混合物，包括约6000种约8000种同系物。 本方法适用于未经过滤的地表水、地下水、饮用水和废水中短链氯化石蜡总量的气相色谱-质谱-电子捕获负电离（GC-ECNI-MS）测定。 根据GC-ECNI-MS仪器的性能，该方法的浓度范围为0,1μg/l或更低至10μg/l。根据废水基质，最低可检测浓度估计为>； 0.1μg/l。关于该方法的实验室间试验数据见附录I。

This document specifies a method for the quantitative determination of the sum of short-chain polychlorinated n-alkanes also known as short-chain polychlorinated paraffins (SCCPs) in the carbon bond range n-C10 to n-C13 inclusive, in mixtures with chlorine mass fractions ("contents") between 50 % and 67 %, including approximately 6 000 of approximately 8 000 congeners. This method is applicable to the determination of the sum of SCCPs in unfiltered surface water, ground water, drinking water and waste water using gas chromatography-mass spectrometry with electron capture negative ionization (GC-ECNI-MS). Depending on the capability of the GC-ECNI-MS instrument, the concentration range of the method is from 0,1 μg/l or lower to 10 μg/l. Depending on the waste water matrix, the lowest detectable concentration is estimated to be > 0,1 μg/l. The data of the interlaboratory trial concerning this method are given in Annex I.