标准摘要
[中文适用范围]： 本文件规定了一种测定水中总有机碳（TOC）、溶解有机碳（DOC）、总束缚氮（TNb）和以游离氨、铵盐、亚硝酸盐、硝酸盐及可能转化为氧化氮的有机化合物形式存在的溶解束缚氮（DNb）的方法。 当样品中存在氰化物、氰酸盐和元素碳（炭黑）颗粒时，它们可以与有机碳一起被测定。 不测定溶解氮气(N₂)。 一般来说，该方法可用于测定总碳（TC）和无机碳（TIC）——见附录A。 本文件适用于测定水样（如饮用水、原水、地下水、地表水、海水、废水、渗滤液）中的TOC和DOC≥1 mg/L，TNb和DNb≥1 mg/L。 上限工作范围受仪器条件限制（如进样量）。更高的浓度可以通过适当稀释样品来测定。 测定<1 mg/L的浓度取决于仪器条件和适当的校准。对于含有挥发性有机化合物的样品（如工业废水），可以考虑使用差值法——见附录A。 该程序通过自动化分析进行。 [外文原描述]： This document specifies a method to determine the total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) in the form of free ammonia, ammonium, nitrite, nitrate and organic compounds capable of conversion to nitrogen oxides. Cyanide, cyanate and particles of elemental carbon (soot), when present in the sample, can be determined together with the organic carbon. Dissolved nitrogen gas (N 2 ) is not determined. NOTE Generally, the method can be applied for the determination of total carbon (TC) and total inorganic carbon (TIC) – see Annex A. The method is applicable to water samples (e.g. drinking water, raw water, ground water, surface water, sea water, waste water, leachates). This document is applicable to determination of TOC and DOC ≥1 mg/l and TNb and DNb ≥1 mg/l. The upper working range is restricted by instrument-dependent conditions (e.g. injection volume). Higher concentrations can be determined after appropriate dilution of the sample. The determination of concentrations <1 mg/l is dependent on instrument conditions applying appropriate calibration. For samples containing volatile organic compounds (e.g. industrial waste water), the application of the difference method can be considered – see Annex A. The procedure is carried out by automated analysis.
英文名称Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion