EPA Method 8095 Explosives by Gas Chromatography - Revision 0
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767041135044494FA479100E2C8BEE83 |
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文件大小(MB)： |
0.1 |
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页数： |
27 |
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日期： |
2008-2-26 |
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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）：
8095 - 1 Revision 0,February 2007,METHOD 8095,EXPLOSIVES BY GAS CHROMATOGRAPHY,SW-846 is not intended to be an analytical training manual. Therefore, method,procedures are written based on the assumption that they will be performed by analysts who are,formally trained in at least the basic principles of chemical analysis and in the use of the subject,technology.,In addition, SW-846 methods, with the exception of required method use for the analysis,of method-defined parameters, are intended to be guidance methods which contain general,information on how to perform an analytical procedure or technique which a laboratory can use,as a basic starting point for generating its own detailed Standard Operating Procedure (SOP),either for its own general use or for a specific project application. The performance data,included in this method are for guidance purposes only, and are not intended to be and must,not be used as absolute QC acceptance criteria for purposes of laboratory accreditation.,1.0 SCOPE AND APPLICATION,1.1 This method may be used to determine the concentrations of various explosives in,water and soil using capillary column gas chromatography with an electron capture detector,(GC/ECD). The compounds are nitroaromatics, nitramines, and nitrate esters, which are used,as explosives, are byproducts of the manufacture of explosives, or are the transformation,products of explosives. The method has also been successfully used to determine the,commonly found explosives in acetonitrile extracts from soil prepared by the extraction,procedure in Method 8330. The following RCRA compounds have been determined by this,method.,Compound Abbreviation CAS Number*,2-Amino-4,6-dinitrotoluene 2-Am-DNT 35572-78-2,4-Amino-2,6-dinitrotoluene 4-Am-DNT 1946-51-0,3,5-Dinitroaniline 3,5-DNA 618-87-1,1,3-Dinitrobenzene 1,3-DNB 99-65-0,2,4-Dinitrotoluene 2,4-DNT 121-14-2,2,6-Dinitrotoluene 2,6-DNT 606-20-2,Hexahydro-1,3,5-trinitro-1,3,5-triazine RDX 121-82-4,Nitrobenzene NB 98-95-3,Nitroglycerine NG 55-63-0,2-Nitrotoluene 2-NT 88-72-2,3-Nitrotoluene 3-NT 99-08-1,4-Nitrotoluene 4-NT 99-99-0,Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine HMX 2691-41-0,Pentaerythritoltetranitrate PETN 78-11-5,1,3,5-Trinitrobenzene 1,3,5-TNB 99-35-4,2,4,6-Trinitrophenylmethylnitramine Tetryl 479-45-8,2,4,6-Trinitrotoluene 2,4,6-TNT 118-96-7,8095 - 2 Revision 0,February 2007,* Chemical Abstracts Service Registry number.,1.2 The method is capable of detecting the target compounds in a range from 0.003 to,0.5 μg/L and is capable of quantitative analysis in a range of 0.03 to 5 μg/L, depending on the,sensitivity of the analyte to electron capture detection. Sensitivity data are highly matrix,dependent and may not always be achievable, and are therefore provided as guidance only.,1.3 This method requires special precautions in the operation of the gas,chromatograph because of the thermal lability of many of these compounds, especially the,nitramines.,1.4 Prior to employing this method, analysts are advised to consult the base method,for each type of procedure that may be employed in the overall analysis (e.g., Methods 3500,3600, 5000, and 8000) for additional information on quality control procedures, development of,QC acceptance criteria, calculations, and general guidance. Analysts also should consult the,disclaimer statement at the front of the manual and the information in Chapter Two for guidance,on the intended flexibility in the choice of methods, apparatus, materials, reagents, and,supplies, and on the responsibilities of the analyst for demonstrating that the techniques,employed are appropriate for the analytes of interest, in the matrix of interest, and at the levels,of concern.,In addition, analysts and data users are advised that, except where explicitly specified in a,regulation, the use of SW-846 methods is not mandatory in response to Federal testing,requirements. The information contained in this method is provided by EPA as guidance to be,used by the analyst and the regulated community in making judgments necessary to generate,results that meet the data quality objectives for the intended application.,1.5 Use of this method is restricted to use by, or under the supervision of, analysts,appropriately experienced in the use of GC/ECD, skilled in the interpretation of chromatograms,and trained in the handling of environmental samples that may contain explosives. Also, each,analyst must demonstrate the ability to generate acceptable results with this method.,NOTE: Refer to Sec. 5.0 for additional information on safety.,2.0 SUMMARY OF METHOD,2.1 Samples are extracted using either the solid-phase extraction t……
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