EPA Method 108 Determination Of Particulate And Gaseous Arsenic Emissions
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ID： |
C2C7B97AADAE42E4B43EF4940E2BD3F5 |
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文件大小(MB)： |
0.3 |
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页数： |
29 |
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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）：
1853,METHOD 108 - DETERMINATION OF PARTICULATE,AND GASEOUS ARSENIC EMISSIONS,NOTE: This method does not include all of the,specifications (e.g., equipment and supplies) and procedures,(e.g., sampling and analytical) essential to its,performance. Some material is incorporated by reference,from other methods in Appendix A to 40 CFR Part 60.,Therefore, to obtain reliable results, persons using this,method should have a thorough knowledge of at least the,following additional test methods: Method 1, Method 2,Method 3, Method 5, and Method 12.,1.0 Scope and Application.,1.1 Analytes.,Analyte CAS No. Sensitivity,Arsenic compounds,as arsenic,(As),7440-38-2,Lower limit 10 μg/ml,or less,1.2 Applicability. This method is applicable for,the determination of inorganic As emissions from stationary,sources as specified in an applicable subpart of the,regulations.,1.3 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obtained from air pollutant sampling methods.,2.0 Summary of Method.,1854,Particulate and gaseous As emissions are withdrawn,isokinetically from the source and are collected on a glass,mat filter and in water. The collected arsenic is then,analyzed by means of atomic absorption spectrophotometry,(AAS).,3.0 Definitions. [Reserved],4.0 Interferences.,Analysis for As by flame AAS is sensitive to the,chemical composition and to the physical properties (e.g.,viscosity, pH) of the sample. The analytical procedure,includes a check for matrix effects (Section 11.5).,5.0 Safety.,5.1 This method may involve hazardous materials,operations, and equipment. This test method may not address,all of the safety problems associated with its use. It is,the responsibility of the user to establish appropriate,safety and health practices and determine the applicability,of regulatory limitations prior to performing this test,method.,5.2 Corrosive reagents. The following reagents are,hazardous. Personal protective equipment and safe,procedures that prevent chemical splashes are recommended.,If contact occurs, immediately flush with copious amounts of,water for at least 15 minutes. Remove clothing under shower,1855,and decontaminate. Treat residual chemical burns as thermal,burns.,5.2.1 Hydrochloric Acid (HCl). Highly corrosive,liquid with toxic vapors. Vapors are highly irritating to,eyes, skin, nose, and lungs, causing severe damage. May,cause bronchitis, pneumonia, or edema of lungs. Exposure to,concentrations of 0.13 to 0.2 percent can be lethal to,humans in a few minutes. Provide ventilation to limit,exposure. Reacts with metals, producing hydrogen gas.,5.2.2 Hydrogen Peroxide (H2O2). Very harmful to eyes.,30% H2O2 can burn skin, nose, and lungs.,5.2.3 Nitric Acid (HNO3). Highly corrosive to eyes,skin, nose, and lungs. Vapors are highly toxic and can,cause bronchitis, pneumonia, or edema of lungs. Reaction to,inhalation may be delayed as long as 30 hours and still be,fatal. Provide ventilation to limit exposure. Strong,oxidizer. Hazardous reaction may occur with organic,materials such as solvents.,5.2.4 Sodium Hydroxide (NaOH). Causes severe damage,to eyes and skin. Inhalation causes irritation to nose,throat, and lungs. Reacts exothermically with small amounts,of water.,6.0 Equipment and Supplies.,1856,6.1 Sample Collection. A schematic of the sampling,train used in performing this method is shown in Figure,108-1; it is similar to the Method 5 sampling train of 40,CFR Part 60, Appendix A. The following items are required,for sample collection:,6.1.1 Probe Nozzle, Probe Liner, Pitot Tube,Differential Pressure Gauge, Filter Holder, Filter Heating,System, Temperature Sensor, Metering System, Barometer, and,Gas Density Determination Equipment. Same as Method 5,Sections 6.1.1.1 to 6.1.1.7, 6.1.1.9, 6.1.2, and 6.1.3,respectively.,6.1.2 Impingers. Four impingers connected in series,with leak-free ground-glass fittings or any similar,leak-free noncontaminating fittings. For the first, third,and fourth impingers, use the Greenburg-Smith design,modified by replacing the tip with a 1.3-cm ID (0.5-in.),glass tube extending to about 1.3 cm (0.5 in.) from the,bottom of the flask. For the second impinger, use the,Greenburg-Smith design with the standard tip. Modifications,(e.g., flexible connections between the impingers, materials,other than glass, or flexible vacuum lines to connect the,filter holder to the condenser) are subject to the approval,of the Administrator.,1857,6.1.3 Temperature Sensor. Place a temperature,sensor, capable of measuring temperature to within 1 EC (2,EF), at the outlet of the fourth impinger for monitoring,purposes.,6.2 Sample R……
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