ASTM D4913-2000(2005)e1 Standard Practice for Determining Concentration of Hydrogen Sulfide by Direct Reading Length of Stain Visual Chemical Detectors《通过直读、污斑范围、目视化学检测器测定硫化氢的浓度的标准.pdf
《ASTM D4913-2000(2005)e1 Standard Practice for Determining Concentration of Hydrogen Sulfide by Direct Reading Length of Stain Visual Chemical Detectors《通过直读、污斑范围、目视化学检测器测定硫化氢的浓度的标准.pdf》由会员分享,可在线阅读,更多相关《ASTM D4913-2000(2005)e1 Standard Practice for Determining Concentration of Hydrogen Sulfide by Direct Reading Length of Stain Visual Chemical Detectors《通过直读、污斑范围、目视化学检测器测定硫化氢的浓度的标准.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 4913 00 (Reapproved 2005)e1Standard Practice forDetermining Concentration of Hydrogen Sulfide by DirectReading, Length of Stain, Visual Chemical Detectors1This standard is issued under the fixed designation D 4913; the number immediately following the designation indicates the year of
2、original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEThis practice was corrected editorially in October 2005.1. Scope
3、1.1 This practice covers the detection of hydrogen sulfidegas by visual chemical detectors. Included under visual chemi-cal detectors are: short-term detector tubes (1),2long-termdetector tubes (2), and length-of-stain dosimeters (3). Diffusiontubes are not included under this practice because they
4、are notdirect reading, and spot tests are not included because of theirpoor accuracy. The sample results are immediately available byvisual observation, thus no analytical equipment is needed.1.2 This practice reflects the current state-of-the-art forcommercially available visual length-of-stain det
5、ectors forhydrogen sulfide. Any mention of a specific manufacturer inthe text or references does not constitute an endorsement byASTM.1.3 The values stated in SI units are to be regarded asstandard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its u
6、se. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3D 1356 Terminology Relating to Sampling and Analysis ofAtmospheresD 3686 P
7、ractice for Sampling Atmospheres to Collect Or-ganic Compound Vapors (Activated Charcoal Tube Adsorp-tion Method)D 4490 Practice for Measuring the Concentration of ToxicGases or Vapors Using Detector TubesD 4599 Practice for Measuring the Concentration of ToxicGases or Vapors Using Length-of-Stain D
8、osimeters2.2 Other Documents:CFR 1910.1000 Federal Occupational Safety and HealthStandard Title 29, Part 1910.1000, Subpart Z, and Part1926.55, Subpart D4NIOSH Criteria for a Recommended Standard, Occupa-tional Exposure to Hydrogen Sulfide, 19775Threshold Limit Values for Chemical Substances in theW
9、ork Environment Adopted by the American Conferenceof Governmental Industrial Hygienists, latest issue62.3 ANSI Standard:ANSI/ISEA 1021990(R1998) Gas Detector Tube Units-Short-Term Type for Toxic Gases and Vapors in WorkingEnvironments73. Terminology3.1 DefinitionsFor definitions of terms used in thi
10、smethod, refer to Terminology D 1356.4. Summary of Practice4.1 In general, the length-of-stain visual detectors describedin this practice consist of a sealed glass tube filled with areactive chemical dispersed on a granular material or a paperstrip. This reactive material is sensitive to hydrogen su
11、lfide andchanges color upon exposure to hydrogen sulfide gas. Thesedetectors are designed so that the length of the color change inthe tube is related to the concentration of hydrogen sulfideunder conditions of sampling volume or sampling time speci-fied by the manufacturer. These detectors are typi
12、cally cali-brated by the manufacturer on an individual lot basis. Threegeneral types of detectors are in current use.1This practice is under the jurisdiction of ASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.04 on WorkplaceAtmospheres.Current edition approved O
13、ct. 1, 2005. Published January 2006. Originallyapproved in 1989. Last previous edition approved in 2000 as D 4913 - 00.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard practice.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcont
14、act ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Code of Federal Regulations, available from the U.S. Government PrintingOffice Superintendent of Documents, 732 N. Capitol St., NW, Mail
15、 Stop: SDE,Washington, DC 20401.5Available from National Technical Information Service (NTIS), U.S. Depart-ment of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.6Available from American Conference of Governmental Industrial Hygienists,Inc. (ACGIH), 1330 Kemper Meadow Dr., Suite 600, Cincinnat
16、i, OH 45240.7Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.1 Short-Term Detector TubesA given volume of air(specified by
17、the manufacturer) is pulled through the tube by apump in a time period on the order of 1 to 10 min. Thelength-of-stain is related to the amount of air sampled and thehydrogen sulfide concentration during the sample period.4.1.2 Long-Term Detector TubesThe air sample is pulledthrough the tube at a sl
18、ower, constant flow rate (specified bythe manufacturer) by an electrical pump over a 1- to 8-h timeperiod. The length of color change and the sampling time areused to estimate the time weighted average (TWA) concentra-tion of hydrogen sulfide.4.1.3 Length-of-Stain Dosimeter TubesThis detector typesa
19、mples the atmosphere to be tested by diffusion; no pump isrequired. Sampling times are on the order of 1 to 8 h and thestain length as a function of sampling time is related to theTWA concentration of hydrogen sulfide.4.2 Information on the correct use of detector tubes andlength-of-stain dosimeters
20、 is presented.5. Significance and Use5.1 GeneralHydrogen sulfide is nearly ubiquitous. Itoccurs naturally in volcanic gases, in sulfur springs andfumaroles, in decaying of plant and animal protein, and inintestines as a result of bacterial action. Hydrogen sulfide is aserious hazard to the health of
21、 workers employed in energyproduction from hydrocarbon or geothermal sources, in theproduction of fibers and sheets from viscose syrup, in theproduction of deuterium oxide (heavy water), in tanneries,sewers, sewage treatment and animal waste disposal, in workbelow ground, on fishing boats, and in ch
22、emical operations,including the gas and oil industry.5.2 In 29 CFR 1910.1000, the Federal Occupational Safetyand Health Administration designates that worker exposure tocertain gases and vapors must not be exceeded in workplaceatmospheres at concentrations above specific values, averagedover a certa
23、in time span. Hydrogen sulfide is included in thislist. Refer also to NIOSH Criteria for a Recommended Stan-dard, Occupational Exposure to Hydrogen Sulfide.5.3 This practice will provide means for the determinationof airborne concentrations of hydrogen sulfide.5.4 This practice provides means for ei
24、ther personal or areasampling and for short-term or time-weighted average (TWA)measurements. Refer to Threshold Limit Values for ChemicalSubstances in the Work Environment.6. Detector Tubes, Short-Term (1,4-9)6.1 GeneralShort-term detector tubes are used for grab-sampling. They allow determination o
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