水质.用purge-and-trap和热解析作用对单环芳香烃、萘和不同氯化物的气相色谱分析测定

[中文适用范围]： 本国际标准规定了通过吹扫捕集分离和气相色谱（GC）测定水中挥发性有机化合物（VOC）的通用方法。 附录 A、B 和 C 提供了可使用本国际标准测定的分析物示例。 它们的范围从二氟二氯甲烷 (R-12) 到三氯苯，包括所有中等挥发性的非极性有机化合物。 优选地通过电子轰击模式(E1)中的质谱法进行检测，但是也可以应用其他检测器。 检测极限很大程度上取决于所使用的检测器和操作参数。 通常可以实现低至 10 ng/l 的检测限。 工作范围通常高达 100 μg/l。 本国际标准适用于饮用水、地下水、地表水、海水和（稀释的）废水。 注：1) 给出的值是检测限的指示。 它的计算方法是在重复性条件下对 10 个重复样品进行一系列测量的标准偏差的 3 倍。 [外文原描述]： ISO 15680:2003 specifies a general method for the determination of volatile organic compounds (VOCs) in water by purge-and-trap isolation and gas chromatography (GC). Annexes A, B and C provide examples of analytes that can be determined using ISO 15680:2003. They range from difluorodichloromethane (R-12) up to trichlorobenzene, including all non-polar organic compounds of intermediate volatility. Detection is preferably carried out by mass spectrometry in the electron impact mode (EI), but other detectors may be applied as well. The limit of detection largely depends on the detector in use and the operational parameters. Typically detection limits as low as 10 ng/l can be achieved. The working range typically is up to 100 micrograms per litre. ISO 15680:2003 is applicable to drinking water, ground water, surface water, seawater and to (diluted) waste water.