EPA Method 601 Purgeable Halocarbons
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ID： |
74B71005BA754772AF90C8E7FD7921F9 |
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文件大小(MB)： |
0.26 |
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页数： |
23 |
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文件格式： |
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日期： |
2003-1-16 |
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购买： |
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）：
APPENDIX A TO PART 136,METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND,INDUSTRIAL WASTEWATER,METHOD 601—PURGEABLE HALOCARBONS,1. Scope and Application,1.1 This method covers the determination of 29 purgeable halocarbons.,The following parameters may be determined by this method:,Parameter STORET CAS No.,No.,Bromodichloromethane . . . . . . . . . . . . . . . 32101 75-27-4,Bromoform . . . . . . . . . . . . . . . . . . . . . . . . 32104 75-25-2,Bromomethane . . . . . . . . . . . . . . . . . . . . . 34413 74-83-9,Carbon tetrachloride . . . . . . . . . . . . . . . . . 32102 56-23-5,Chlorobenzene . . . . . . . . . . . . . . . . . . . . . 34301 108-90-7,Chloroethane . . . . . . . . . . . . . . . . . . . . . . . 34311 75-00-3,2-Chloroethylvinyl ether . . . . . . . . . . . . . . 34576 100-75-8,Chloroform . . . . . . . . . . . . . . . . . . . . . . . . 32106 67-66-3,Chloromethane . . . . . . . . . . . . . . . . . . . . . 34418 74-87-3,Dibromochloromethane . . . . . . . . . . . . . . . 32105 124-48-1,1,2-Dichlorobenzene . . . . . . . . . . . . . . . . . 34536 95-50-1,1,3-Dichlorobenzene . . . . . . . . . . . . . . . . . 34566 541-73-1,1,4-Dichlorobenzene . . . . . . . . . . . . . . . . . 34571 106-46-7,Dichlorodifluoromethane . . . . . . . . . . . . . . 34668 75-71-8,1,1-Dichloroethane . . . . . . . . . . . . . . . . . . . 34496 75-34-3,1,2-Dichloroethane . . . . . . . . . . . . . . . . . . . 34531 107-06-2,1,1-Dichloroethene . . . . . . . . . . . . . . . . . . . 34501 75-35-4,trans-1,2-Dichloroethene . . . . . . . . . . . . . . 34546 156-60-5,1,2-Dichloropropane . . . . . . . . . . . . . . . . . 34541 78-87-5,cis-1,3-Dichloropropene . . . . . . . . . . . . . . . 34704 10061-01-5,trans-1,3-Dichloropropene . . . . . . . . . . . . . 34699 10061-02-6,Methylene chloride . . . . . . . . . . . . . . . . . . 34423 75-09-2,1,1,2,2-Tetrachloroethane . . . . . . . . . . . . . . 34516 79-34-5,Tetrachloroethene . . . . . . . . . . . . . . . . . . . 34475 127-18-4,1,1,1-Trichloroethane . . . . . . . . . . . . . . . . . 34506 71-55-6,1,1,2-Trichloroethane . . . . . . . . . . . . . . . . . 34511 79-00- 5,Tetrachloroethene . . . . . . . . . . . . . . . . . . . 39180 79-01-6,Trichlorofluoromethane . . . . . . . . . . . . . . . 34488 75-69-4,Vinyl chloride . . . . . . . . . . . . . . . . . . . . . . 39715 75-01-4,1.2 This is a purge and trap gas chromatographic (GC) method applicable to the,determination of the compounds listed above in municipal and industrial discharges as,provided under 40 CFR Part 136.1. When this method is used to analyze unfamiliar,samples for any or all of the compounds above, compound identifications should be,supported by at least one additional qualitative technique. This method describes,analytical conditions for a second gas chromatographic column that can be used to,confirm measurements made with the primary column. Method 624 provides gas,chromatograph/mass spectrometer (GC/MS) conditions appropriate for the qualitative,and quantitative confirmation of results for most of the parameters listed above.,1.3 The method detection limit (MDL, defined in Section 12.1)1 for each parameter 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.,1.4 Any modification of this method, beyond those expressly permitted, shall be considered,as a major modification subject to application and approval of alternate test procedures,under 40 CFR Parts 136.4 and 136.5.,1.5 This method is restricted to use by or under the supervision of analysts experienced in,the operation of a purge and trap system and a gas chromatograph and in the,interpretation of gas chromatograms. Each analyst must demonstrate the ability to,generate acceptable results with this method using the procedure described in Section 8.2.,2. Summary of Method,2.1 An inert gas is bubbled through a 5 mL water sample contained in a specially-designed,purging chamber at ambient temperature. The halocarbons are efficiently transferred,from the aqueous phase to the vapor phase. The vapor is swept through a sorbent trap,where the halocarbons are trapped. After purging is completed, the trap is heated and,back flushed with the inert gas to desorb the halocarbons onto a gas chromatographic,column. The gas chromatograph is temperature programmed to separate the halocarbons,which are then detected with a halide-specific detector.2,3,2.2 The method provides an optional gas chromatographic column that may be helpful in,resolving the compounds of interest from interferences that may occur.,3. Interferences,3.1 Impurities in the purge gas and ……
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