標準號：ISO 18073-2004
中文標準名稱：水質.三氯至八氯二氧雜環乙烯和呋喃的測定.同位素稀釋HRGC/HRMS法
英文標準名稱：Water quality - Determination of tetra- to octa-chlorinated dioxins and furans - Method using isotope dilution HRGC/HRMS
標準類型：Z16
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：Z16
國際標準分類號：13.060.50
適用范圍：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 masssolids) 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 inTable 1.The detection limits and quantitation levels in this method are usually dependent on the level of interferencesrather than instrumental limitations. The minimum levels (MLs) specified in Table 2 are the levels at which thePCDDs/PCDFs can be determined with no interferences present. The method detection limit (MDL) for2,3,7,8-TCDD has been determined as 4,4 pg/l based on this method using a sample volume of 1 l. Lowerdetection 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 interferencesor lower the cost of measurements, provided that all performance criteria in this International Standard aremet. The requirements for establishing method equivalency are given in 9.1.2.