EPA Method 25E Determination Of Vapor Phase Organic Concentration In Waste Samples
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ID： |
DCBADC23CEDE4C9CB6C66B022FABFDBE |
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文件大小(MB)： |
0.15 |
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页数： |
14 |
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文件格式： |
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日期： |
2000-2-12 |
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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）：
1318,METHOD 25E - DETERMINATION OF VAPOR PHASE,ORGANIC CONCENTRATION IN WASTE SAMPLES,NOTE: Performance of this method should not be,attempted by persons unfamiliar with the operation of a,flame ionization detector (FID) nor by those who are,unfamiliar with source sampling because knowledge beyond the,scope of this presentation is required. This method is not,inclusive with respect to specifications (e.g., reagents and,standards) and calibration procedures. Some material is,incorporated by reference from other methods. Therefore, to,obtain reliable results, persons using this method should,have a thorough knowledge of at least the following,additional test methods: Method 106, part 61, Appendix B,and Method 18, part 60, Appendix A.,1.0 Scope and Application.,1.1 Applicability. This method is applicable for,determining the vapor pressure of waste cited by an,applicable regulation.,1.2 Data Quality Objectives. Adherence to the,requirements of this method will enhance the quality of the,data obtained from air pollutant sampling methods.,2.0 Summary of Method.,2.1 The headspace vapor of the sample is analyzed for,carbon content by a headspace analyzer, which uses an FID.,3.0 Definitions. [Reserved],1319,4.0 Interferences.,4.1 The analyst shall select the operating parameters,best suited to the requirements for a particular analysis.,The analyst shall produce confirming data through an,adequate supplemental analytical technique and have the data,available for review by the Administrator.,5.0 Safety. [Reserved],6.0 Equipment and Supplies.,6.1 Sampling. The following equipment is required:,6.1.1 Sample Containers. Vials, glass, with butyl,rubber septa, Perkin-Elmer Corporation Numbers 0105-0129,(glass vials), B001-0728 (gray butyl rubber septum, plug,style), 0105-0131 (butyl rubber septa), or equivalent. The,seal must be made from butyl rubber. Silicone rubber seals,are not acceptable.,6.1.2 Vial Sealer. Perkin-Elmer Number 105-0106, or,equivalent.,6.1.3 Gas-Tight Syringe. Perkin-Elmer Number,00230117, or equivalent.,6.1.4 The following equipment is required for,sampling.,6.1.4.1 Tap.,6.1.4.2 Tubing. Teflon, 0.25-in. ID.,1320,NOTE: Mention of trade names or specific products,does not constitute endorsement by the Environmental,Protection Agency.,6.1.4.3 Cooling Coil. Stainless steel (304), 0.25,in.-ID, equipped with a thermocouple at the coil outlet.,6.2 Analysis. The following equipment is required.,6.2.1 Balanced Pressure Headspace Sampler.,Perkin-Elmer HS-6, HS-100, or equivalent, equipped with a,glass bead column instead of a chromatographic column.,6.2.2 FID. An FID meeting the following,specifications is required.,6.2.2.1 Linearity. A linear response (±5 percent),over the operating range as demonstrated by the procedures,established in Section 10.2.,6.2.2.2 Range. A full scale range of 1 to 10,000,parts per million (ppm) propane (C3H8). Signal attenuators,shall be available to produce a minimum signal response of,10 percent of full scale.,6.2.3 Data Recording System. Analog strip chart,recorder or digital integration system compatible with the,FID for permanently recording the output of the detector.,6.2.4 Temperature Sensor. Capable of reading,temperatures in the range of 30 to 60EC,(86 to 140EF) with an accuracy of ±0.1EC (±0.2EF).,1321,7.0 Reagents and Standards.,7.1 Analysis. The following items are required for,analysis.,7.1.1 Hydrogen (H2). Zero grade hydrogen, as,required by the FID.,7.1.2 Carrier Gas. Zero grade nitrogen, containing,less than 1 ppm carbon (C) and less than 1 ppm carbon,dioxide.,7.1.3 Combustion Gas. Zero grade air or oxygen as,required by the FID.,7.2 Calibration and Linearity Check.,7.2.1 Stock Cylinder Gas Standard. 100 percent,propane. The manufacturer shall: (a) certify the gas,composition to be accurate to ±3 percent or better (see,Section 7.2.1.1); (b) recommend a maximum shelf life over,which the gas concentration does not change by greater than,±5 percent from the certified value; and (c) affix the date,of gas cylinder preparation, certified propane,concentration, and recommended maximum shelf life to the,cylinder before shipment to the buyer.,7.2.1.1 Cylinder Standards Certification. The,manufacturer shall certify the concentration of the,calibration gas in the cylinder by (a) directly analyzing,the cylinder and (b) calibrating his analytical procedure on,1322,the day of cylinder analysis. To calibrate his analytical,procedure, the manufacturer shall use, as a minimum, a,three-point calibration curve.,7.2.1.2 Verification of Manufacturer's Calibration,Standards. Before using, the manufacturer shall verify each,calibration standard by (a) com……
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