EPA Method 8082A Polychlorinated Biphenyls (PCBs) by Gas Chromatography
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960DD697D94D43E0820E0B5BEE5F43F0 |
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文件大小(MB)： |
0.11 |
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页数： |
57 |
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日期： |
2009-12-31 |
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文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
8082A - 1 Revision 1,November 2000,METHOD 8082A,POLYCHLORINATED BIPHENYLS (PCBs) BY GAS CHROMATOGRAPHY,1.0 SCOPE AND APPLICATION,1.1 Method 8082 is used to determine the concentrations of polychlorinated biphenyls,(PCBs) as Aroclors or as individual PCB congeners in extracts from solid, tissue, and aqueous,matrices, using open-tubular, capillary columns with electron capture detectors (ECD) or electrolytic,conductivity detectors (ELCD). The target compounds listed below may be determined by either,a single- or dual-column analysis system. The Aroclors and PCB congeners listed below have been,tested by this method, and the method may be appropriate for additional congeners and Aroclors,(see Sec. 1.4). The method also may be applied to other matrices such as oils and wipe samples,if appropriate sample extraction procedures are employed.,Compound CAS Registry No. IUPAC #,Aroclor 1016 12674-11-2 -,Aroclor 1221 11104-28-2 -,Aroclor 1232 11141-16-5 -,Aroclor 1242 53469-21-9 -,Aroclor 1248 12672-29-6 -,Aroclor 1254 11097-69-1 -,Aroclor 1260 11096-82-5 -,2-Chlorobiphenyl 2051-60-7 1,2,3-Dichlorobiphenyl 16605-91-7 5,2,2',5-Trichlorobiphenyl 37680-65-2 18,2,4',5-Trichlorobiphenyl 16606-02-3 31,2,2',3,5'-Tetrachlorobiphenyl 41464-39-5 44,2,2',5,5'-Tetrachlorobiphenyl 35693-99-3 52,2,3',4,4'-Tetrachlorobiphenyl 32598-10-0 66,2,2',3,4,5'-Pentachlorobiphenyl 38380-02-8 87,2,2',4,5,5'-Pentachlorobiphenyl 37680-73-2 101,2,3,3',4',6-Pentachlorobiphenyl 38380-03-9 110,2,2',3,4,4',5'-Hexachlorobiphenyl 35065-28-2 138,2,2',3,4,5,5'-Hexachlorobiphenyl 52712-04-6 141,2,2',3,5,5',6-Hexachlorobiphenyl 52663-63-5 151,2,2',4,4',5,5'-Hexachlorobiphenyl 35065-27-1 153,2,2',3,3',4,4',5-Heptachlorobiphenyl 35065-30-6 170,2,2',3,4,4',5,5'-Heptachlorobiphenyl 35065-29-3 180,2,2',3,4,4',5',6-Heptachlorobiphenyl 52663-69-1 183,2,2',3,4',5,5',6-Heptachlorobiphenyl 52663-68-0 187,2,2',3,3',4,4',5,5',6-Nonachlorobiphenyl 40186-72-9 206,8082A - 2 Revision 1,November 2000,1.2 Aroclors are multi-component mixtures. When samples contain more than one,Aroclor, a higher level of analyst expertise is required to attain acceptable levels of qualitative and,quantitative analysis. The same is true of Aroclors that have been subjected to environmental,degradation ("weathering") or degradation by treatment technologies. Such weathered multicomponent,mixtures may have significant differences in peak patterns compared to those of Aroclor,standards.,1.3 The seven Aroclors listed in Sec. 1.1 are those that are commonly specified in EPA,regulations. The quantitation of PCBs as Aroclors is appropriate for many regulatory compliance,determinations, but is particularly difficult when the Aroclors have been weathered by long exposure,in the environment. Therefore, this method provides procedures for the determination of a selected,group of the 209 possible PCB congeners, as another means to measure the concentrations of,weathered Aroclors. The 19 PCB congeners listed above have been tested by this method and,were chosen for testing because many of them represent congeners specific to the common,Aroclor formulations (see Table 7). These 19 PCB congeners do not represent the co-planar PCBs,or the other PCBs of greatest toxicological significance. The analytical procedures for these 19,congeners may be appropriate for the analysis of other congeners not specifically included in this,method and may be used as a template for the development of such a procedure. However, all 209,PCB congeners cannot be separated using the GC columns and procedures described in this,method. If this procedure is expanded to encompass other congeners, then the analyst must either,document the resolution of the congeners in question, or establish procedures for reporting the,results of coeluting congeners that are appropriate for the intended application.,1.4 The PCB congener approach potentially affords greater quantitative accuracy when,PCBs are known to be present. As a result, this method may be used to determine Aroclors, some,PCB congeners, or "total PCBs," depending on regulatory requirements and project needs. The,congener method is of particular value in determining weathered Aroclors. However, analysts,should use caution when using the congener method when regulatory requirements are based on,Aroclor concentrations. Also, this method is not appropriate as written for the determination of the,co-planar PCB congeners at the very low (sub part per trillion) concentrations sometimes needed,for risk assessment purposes.,1.5 Compound identification based on single-column analysis should be confirmed on a,second column, or should be supported by at leas……
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