ASTM D6345-1998(2004)e1 Standard Guide for Selection of Methods for Active Integrative Sampling of Volatile Organic Compounds in Air《空气中挥发性有机化合物活动性的集中的取样方法选择的标准指南》.pdf
《ASTM D6345-1998(2004)e1 Standard Guide for Selection of Methods for Active Integrative Sampling of Volatile Organic Compounds in Air《空气中挥发性有机化合物活动性的集中的取样方法选择的标准指南》.pdf》由会员分享,可在线阅读,更多相关《ASTM D6345-1998(2004)e1 Standard Guide for Selection of Methods for Active Integrative Sampling of Volatile Organic Compounds in Air《空气中挥发性有机化合物活动性的集中的取样方法选择的标准指南》.pdf(9页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 6345 98 (Reapproved 2004)e1Standard Guide forSelection of Methods for Active, Integrative Sampling ofVolatile Organic Compounds in Air1This standard is issued under the fixed designation D 6345; the number immediately following the designation indicates the year oforiginal adoption or
2、, 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.e1NOTEEditorial changes were made to the title of Practice D 6196 in 2.1 and to Reference
3、number (2) in April 2004.1. Scope1.1 This guide provides assistance in the selection of activeintegrative sampling methods, in which the volatile organicanalytes are collected from air over a period of time by drawingthe air into the sampling device, with subsequent recovery foranalysis. Where avail
4、able, specific ASTM test methods andpractices are referenced.1.2 Guidance is provided for the selection of active sam-pling methods based either on collection of an untreated airsample (whole air samples) or selective sampling using sorbentconcentration techniques that selectively concentrate compo-
5、nents in air. Advantages and disadvantages of specific collec-tion vehicles are presented.1.3 This guide does not cover the use of cryogenicallycooled field sampling devices used in some automated analysissystems. Detailed instructions for cryogenic recovery of com-pounds captured as whole air sampl
6、es or thermally desorbedfrom sorbents are typically covered in standard methods forsample analysis and are beyond the scope of this guide.1.4 Both thermal and solvent desorption techniques forsample recovery are discussed.1.5 Organic compounds are classified on the basis of vaporpressure as very vol
7、atile, volatile, semivolatile and nonvolatile.Physical characteristics of many volatile organic compounds(VOCs) are provided to aid in selection of sampling techniquesfor VOC measurement. Semivolatile and nonvolatile organiccompounds are defined in the guide to help guide users avoidmisidentifying c
8、ompounds that are not covered in this guide.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulat
9、ory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1356 Terminology Relating to Sampling and Analysis ofAtmospheresD 1357 Practice for Planning the Sampling of the AmbientAtmosphereD 3686 Practice for Sampling Atmospheres to Collect Or-ganic Compound Vapors (Activated Charcoal
10、 TubeMethod)D 3687 Practice for Analysis of Organic Compound VaporsCollected by the Activated Charcoal Tube AdsorptionMethodD 5197 Test Method for Determination of Formaldehydeand Other Carbonyl Compounds in Air (Active SamplerMethodology)D 5466 Test Method for Determination of Volatile OrganicChemi
11、cals in Atmospheres (Canister Sampling Methodol-ogy)D 5953M Test Method for Determination of Non-MethaneOrganic Compounds (NMOC) in Ambient Air UsingCryogenic Preconcentration and Direct Flame IonizationDetection Method (Metric)D 6196 Practice for Selection of Sorbents, Sampling, andThermal Desorpti
12、on Analysis Procedures for Volatile Or-ganic Compounds in Air3. Terminology3.1 DefinitionsFor definitions of terms used in this guiderefer to Terminology D 1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 cryofocusthe process of concentrating compoundsfrom an air sample for subsequent a
13、nalysis by collection on atrap cooled with a cryogen to very low temperatures (forexample, -186C).1This guide is under the jurisdiction of ASTM Committee D22 on Sampling andAnalysis of Atmospheres and is the direct responsibility of Subcommittee D22.05on Indoor Air.Current edition approved April 1,
14、2004. Published June 2004. Originallyapproved in 1998. Last previous edition approved in 1998 as D 6345 - 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the sta
15、ndards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.1.1 DiscussionCryogenic traps used for cryofocusingare typically U-shaped stainless steel tubes filled with glassbeads or other inert
16、 material. An example of such a cryofocus-ing trap is given in Test Method D 5933M. Compounds aretypically released from cryogenic traps into the analyticalsystem by rapid heating to elevated temperatures. Sorbent-filled tubes cooled to sub-ambient temperatures (for example,-30C) have also been used
17、 for this purpose.3.2.2 very volatile organic compounds (VVOCs)Low mo-lecular weight organic compounds that possess vapor pressuresgreater than 15 kPa at 25C and boiling points typically below30C.4. Significance and Use4.1 This guide provides a broad perspective on techniquesthat can be used by envi
18、ronmental managers for selecting VOCair monitoring methods. It summarizes various methods formeasurement of VOC in air derived from a variety of sourcesand experiences and incorporates them into condensed guide-lines. This guide provides a common basis for selectingmethods for VOC measurement as wel
19、l a discussion of thelimitations of typical methods.4.2 This guide should be used during the planning stages ofan air monitoring program along with other applicable guidesand practices (for example, D 1357) to select ASTM or otherappropriate methods.5. Characteristics of Organic Compounds5.1 Physica
20、l and chemical characteristics of VOCs areavailable from numerous references (1, 2, 3, 4).3The propertiesof the VOCs listed under the Clean Air Act of 1990 (5) arepresented in Table 1 and Table 2.TABLE 1 Properties of Clean Air Act Very Volatile Organic HAPsA,BVapor Boiling WaterPressure Point Solub
21、ility (g/L Customary Reactivity inCompound CAS No. (kPa at 25C) (C) at C) Classification AirAcetaldehyde 75-07-0 127 21 33.0 / 25 PolarAcrolein 107-02-8 29 53 100 /21 Polar ReactiveAllyl chloride 107-05-1 45 45 19.5 / 20 Non-Polar1.3-Butadiene 106-99-0 267 -5 Insoluble Non-Polar Reactive (?)Carbon d
22、isulfide 75-15-0 35 47 100 / 20 PolarChloroform 67-66-3 21 61 0.85 / 20-24 Non-PolarChloromethly methylether107-30-2 30 59 Reacts Polar ReactiveChloroprene 126-99-8 30 59 Slightly soluble Non-PolarDiazomethane 334-88-3 373 -23 Reacts Polar Highly reactive1,1-Dimethylhydrazine 57-14-7 21 63 Reacts No
23、n-Polar Reactive (?)1,2-Epoxybutane 106-88-7 22 63 100 / 17 Polar ReactiveEthyl chloride 75-00-3 133 13 100 / 20 Non-PolarEthyleneimine 151-56-4 21 56 Miscible Polar Reactive (?)Ethylene oxide 75-21-8 147 11 Miscible Polar ReactiveEthylidene dichloride 75-34-3 31 57 100 / 20.5 PolarHexane 110-54-3 1
24、6 69 100 / 19 Polar Highly reactive (?)Vinyl bromide 593-60-2 147 16 Insoluble Non-PolarVinyl chloride 75-01-4 427 -14 Slightly soluble Non-PolarVinylidene chloride 75-35-4 67 32 5-10 / 21 Non-PolarACompounds with vapor pressures 15 kPa.BData taken from Ref. (3).TABLE 2 Properties of Clean Air Act V
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
本资源只提供5页预览,全部文档请下载后查看!喜欢就下载吧,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD634519982004E1STANDARDGUIDEFORSELECTIONOFMETHODSFORACTIVEINTEGRATIVESAMPLINGOFVOLATILEORGANICCOMPOUNDSINAIR

链接地址:http://www.mydoc123.com/p-522236.html