EPA Method 104 Determination Of Beryllium Emissions From Stationary Sources
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1A39A98527A24A81BBE03B90BEECEFC4 |
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文件大小(MB)： |
0.03 |
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页数： |
19 |
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日期： |
2000-2-12 |
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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）：
1776,METHOD 104 - DETERMINATION OF BERYLLIUM EMISSIONS FROM,STATIONARY SOURCES,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 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, and,Method 5 in Appendix A, Part 60.,1.0 Scope and Application.,1.1 Analytes.,Analyte CAS No. Sensitivity,Beryllium (Be) 7440-41-7 Dependent upon recorder,and spectrophotometer.,1.2 Applicability. This method is applicable for the,determination of Be emissions in ducts or stacks at,stationary sources. Unless otherwise specified, this method,is not intended to apply to gas streams other than those,emitted directly to the atmosphere without further,processing.,1.3 Data Quality Objectives. Adherences to the,requirements of this method will enhance the quality of the,data obtained from air pollutant sampling methods.,1777,2.0 Summary of Method.,2.1 Particulate and gaseous Be emissions are,withdrawn isokinetically from the source and are collected,on a glass fiber filter and in water. The collected sample,is digested in an acid solution and is analyzed by atomic,absorption spectrophotometry.,3.0 Definitions. [Reserved],4.0 Interferences.,4.1 Matrix Effects. Analysis for Be by flame atomic,absorption spectrophotometry is sensitive to the chemical,composition and to the physical properties (e.g., viscosity,pH) of the sample. Aluminum and silicon in particular are,known to interfere when present in appreciable quantities.,The analytical procedure includes (optionally) the use of,the Method of Standard Additions to check for these matrix,effects, and sample analysis using the Method of Standard,Additions if significant matrix effects are found to be,present (see Reference 2 in Section 16.0).,5.0 Safety.,5.1 Disclaimer. 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 of this test,method to establish appropriate safety and health practices,1778,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 are useful in preventing chemical splashes. If,contact occurs, immediately flush with copious amounts of,water at least 15 minutes. Remove clothing under shower and,decontaminate. Treat residual chemical burn as thermal,burn.,5.2.1 Hydrochloric Acid (HCl). Highly toxic. 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). Irritating to eyes,skin, nose, and lungs.,5.2.3 Nitric Acid (HNO3). Highly corrosive to eyes,skin, nose, and lungs. Vapors 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.,1779,5.2.4 Sodium Hydroxide (NaOH). Causes severe damage,to eyes and skin. Inhalation causes irritation to nose,throat, and lungs. Reacts exothermically with limited,amounts of water.,5.3 Beryllium is hazardous, and precautions should be,taken to minimize exposure.,6.0 Equipment and Supplies.,6.1 Sample Collection. Same as Method 5, Section,6.1, with the exception of the following:,6.1.1 Sampling Train. Same as Method 5, Section,6.1.1, with the exception of the following:,6.1.2 Probe Liner. Borosilicate or quartz glass,tubing. A heating system capable of maintaining a gas,temperature of 120 ± 14 EC (248 ± 25 EF) at the probe exit,during sampling to prevent water condensation may be used.,NOTE: Do not use metal probe liners.,6.1.3 Filter Holder. Borosilicate glass, with a,glass frit filter support and a silicone rubber gasket.,Other materials of construction (e.g., stainless steel,Teflon, Viton) may be used, subject to the approval of the,Administrator. The holder design shall provide a positive,seal against leakage from the outside or around the filter.,The holder shall be attached immediately at the outlet of,the probe. A h……
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