ISO 18073:2004
水质.三氯至八氯二氧杂环乙烯和呋喃的测定.同位素稀释HRGC/HRMS法
Water quality - Determination of tetra- to octa-chlorinated dioxins and furans - Method using isotope dilution HRGC/HRMS
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- 标准号
- ISO 18073:2004
- 发布
- 2004年
- 发布单位
- 国际标准化组织
- 当前最新
- ISO 18073:2004
- 引用标准
- ISO 3696:1987 ISO 5667-1 ISO 5667-2 ISO 6879:1995
- 适用范围
- This International Standard specifies a method for the determination of tetra- to octa-chlorinated dibenzo-pdioxins (PCDDs) and dibenzofurans (PCDFs) in waters and waste waters (containing less than 1 % by mass solids) using high-resolution gas chromatography/high-resolution mass spectrometry (HRGC/HRMS). This International Standard is applicable to the seventeen 2,3,7,8-substituted PCDDs/PCDFs specified in Table 1. The detection limits and quantitation levels in this method are usually dependent on the level of interferences rather than instrumental limitations. The minimum levels (MLs) specified in Table 2 are the levels at which the PCDDs/PCDFs can be determined with no interferences present. The method detection limit (MDL) for 2,3,7,8-TCDD has been determined as 4,4 pg/l based on this method using a sample volume of 1 l. Lower detection limits may be achieved by using a larger sample volume. This method is “performance based”. The analyst is permitted to modify the method to overcome interferences or lower the cost of measurements, provided that all performance criteria in this International Standard are met. The requirements for establishing method equivalency are given in 9.1.2.