ISO 21793:2020 水质 湿化学催化臭氧羟基自由基氧化（COHR）后总有机碳（TOC）、溶解有机碳（DOC）、总结合氮（TN_b）、溶解结合氮（DN_b）、总结合磷（TP_b）和溶解结合磷（DP_b）的测定

标准编号：ISO 21793:2020

中文名称：水质 湿化学催化臭氧羟基自由基氧化（COHR）后总有机碳（TOC）、溶解有机碳（DOC）、总结合氮（TN_b）、溶解结合氮（DN_b）、总结合磷（TP_b）和溶解结合磷（DP_b）的测定

英文名称：Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb), dissolved bound nitrogen (DNb), total bound phosphorus (TPb) and dissolved boun

发布日期：2020-09

标准范围

This document specifies a multi-parameter method for the determination of total organic carbon (TOC), total nitrogen (TN_b ) and total phosphorus (TP) in drinking water, raw water, ground water, surface water, sea water, saline water, process water, domestic and industrial wastewater, after a chemical oxidation process. It is applicable to both dissolved and bound suspended materials.
The method allows for determination of TOC, TN and TP. The lower and upper working ranges for these parameters are dependent upon instrument conditions (for example sample volume, reaction chemistry amounts) and can be adjusted for a wider range. Typical measurement ranges are shown in Figures C.1 to C.3.
The analysis procedure is carried out instrumentally by a single oxidation process.
Dissolved nitrogen gas is not included in the TN_b measurement in this method. When present in the sample, elemental carbon, cyanate and thiocyanate will be included in the TOC result.

标准预览图