标准、规范、准则_EPA Method 8070A Nitrosamines by Gas Chromatography - Revision 1.pdfVIP

METHOD 8070A NITROSAMINES BY GAS CHROMATOGRAPHY 1.0 SCOPE AND APPLICATION 1.1 Method 8070 is a gas chromatographic (GC) method applicable to the determination of nitrosamine in aqueous matrices such as groundwater and municipal and industrial discharges. It is also applicable to solid matrices such as soils, sediments, and sludges. Specifically, this method covers the determination of the following compounds: Appropriate Technique Compound CAS No.a 3510 3520 3540/1 3550 3580 N-Nitrosodimethylamine 62-75-9 X X X X X N-Nitrosodiphenylamine 86-30-6 X X X X X N-Nitrosodi-n-propylamine 621-64-7 X X X X X a Chemical Abstract Service Registry Number. X Greater than 70 percent recovery by this preparation technique. 1.2 The method detection limit (MDL) for each analyte of interest is listed in Table 1. The MDL for a specific wastewater may differ from those listed, depending upon the nature of interferences in the sample matrix. This method has been tested for linearity of recovery from spiked organic-free reagent water and has been demonstrated to be applicable for the concentration range from 4 x MDL to 1000 x MDL. 1.3 When this method is used to analyze samples from matrices that are not well characterized, compound identifications should be confirmed by at least one additional qualitative technique. Secondary confirmation can be performed using a dissimilar GC column, specific element detector, or mass spect