ASTM D1739-1998(2004) Standard Test Method for Collection and Measurement of Dustfall (Settleable Particulate Matter)《降尘(可沉降粒状物)的收集和测量的试验方法》.pdf
《ASTM D1739-1998(2004) Standard Test Method for Collection and Measurement of Dustfall (Settleable Particulate Matter)《降尘(可沉降粒状物)的收集和测量的试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D1739-1998(2004) Standard Test Method for Collection and Measurement of Dustfall (Settleable Particulate Matter)《降尘(可沉降粒状物)的收集和测量的试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 1739 98 (Reapproved 2004)Standard Test Method forCollection and Measurement of Dustfall (SettleableParticulate Matter)1This standard is issued under the fixed designation D 1739; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、 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.1. Scope1.1 This test method covers a procedure for collection ofdustfall and its measurement. This test m
3、ethod is not appro-priate for determination of the dustfall rate in small areasaffected by specific sources. This test method describes deter-mination of both water-soluble and insoluble particulate mat-ter.1.2 This test method is inappropriate for industrial hygieneuse except where other more speci
4、fic methods are also used.1.3 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 regulatory limitations pr
5、ior to use.2. Referenced Documents2.1 ASTM Standards:2B57 Specifications for Copper-Alloy Condenser TubePlates3D 1193 Specification for Reagent WaterD 1356 Terminology Relating to Sampling and Analysis ofAtmospheresE11 Specification for Wire Cloth and Sieves for TestingPurposesE 380 Practice for the
6、 Use of the International System ofUnits (SI) (the Modernized Metric System)43. Terminology3.1 DefinitionsFor definitions of terms used in this testmethod, refer to Terminology D 1356. An explanation of units,symbols, and conversion factors may be found in PracticeE 380.3.2 Definition of Terms Speci
7、fic to This Standard:3.2.1 settleable particulate materialany material com-posed of particles small enough to pass through a 1-mm screen(see Specification E11) and large enough to settle by virtue oftheir weight into the container from the ambient air.4. Summary of Test Method4.1 Containers of a sta
8、ndard size and shape are prepared andsealed in a laboratory and then opened and set up at appropri-ately chosen sites so that particulate matter can settle into themfor periods of about 30 days. The containers are then closedand returned to the laboratory. The masses of the water-solubleand -insolub
9、le components of the material collected are deter-mined. The results are reported as grams per square metre per30 days g/(m230d).5. Significance and Use5.1 This test method has the advantage of extreme simplic-ity. It is a crude and non-specific test method, but it is useful inthe study of long-term
10、 trends. It requires very little investmentin equipment and can be carried out without a largetechnically-skilled staff.5.2 This test method is useful for obtaining samples ofsettleable particulate matter for further chemical analysis (1)5.6. Interferences6.1 The results from this test method are ob
11、tained byweighings. Any material that gets into the container and passesthrough the sieve used in analysis, but which did not settle intothe container after air entrainment can be considered aninterferent.7. Apparatus7.1 ContainerAn open-topped cylinder not less than 150mm 6 in. in diameter with hei
12、ght not less than twice itsdiameter. Containers should be made of stainless steel orweatherproof plastic. They shall be capable of acceptinglegible, weatherproof, identification markings. A tight-fittinglid is needed for each container.1This test method is under the jurisdiction of ASTM Committee D2
13、2 onSampling and Analysis of Atmospheres and is the direct responsibility of Subcom-mittee D22.03 on Ambient Atmospheres and Source Emissions.Current edition approved October 1, 2004. Published December 2004. Originallyapproved in 1960. Last previous edition approved in 1998 as D 1739 - 98.2For refe
14、renced 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 standards Document Summary page onthe ASTM website.3Withdrawn. Replaced by B 171.4Withdrawn. Replaced by IEEE/ASTM SI 10.
15、5The boldface numbers in parentheses refer to the list of references at the end ofthis test method.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Stand, for the container, which will hold the top of thecontainer at a height of 2
16、 m above ground. It will also includea wind shield constructed in accordance with Figs. 1 and 2.Experiments reported in Kohler and Fleck (2) indicate thatmuch better precision is obtained when this simple aerody-namic shield is provided, and that there is a wide variability inthe concentration of pa
17、rticles subject to settling at heights ofless than 2 m.7.3 Sieve, 1 mm (No. 18), stainless steel.7.4 Drying Oven, with temperature controlled at 105C.7.5 Buchner Funnel, and 2 L filtering flask.7.6 Filter Paper, fast filtering type, circles to fit the Buchnerfunnel.7.7 Evaporating Dishes, 100-mL cap
18、acity, capable of beingunambiguously identified.7.8 Desiccators.7.9 Analytical Balance, to weigh with a precision of 60.1mg.7.10 Flexible Spatula.7.11 Crate, or frame in which to carry the containers.7.12 Graduated Cylinder, 1 L capacity, whose graduationshave been checked for calibration accuracy,
19、65 mL, using, forexample, volumetric flasks or pipettes.8. Reagents8.1 Purity of WaterUnless otherwise indicated, referenceto water shall be understood to mean reagent water as definedby Type II of Specification D 1193.9. Sampling9.1 Sites (3, 4); for general sampling strategy, see Specifi-cations B
20、57.9.1.1 Location:9.1.1.1 These recommendations are a guide to the selectionof a site. In cases where these guidelines cannot be followed,results should only be presented accompanied by an appropri-ate caveat.9.1.1.2 The sampling site should be in an open area, free ofstructures higher than 1 m with
21、in a 20-m radius of the containerstand. It should be away from local sources of pollution andobjects that could affect the settling of particulate matter, suchas trees, and air exhausts and intakes.Accessibility and securityfrom vandalism are major considerations in the selection of asite.9.1.1.3 El
22、evations to higher objects within 20 m should notexceed 30 from the horizontal.9.1.1.4 Open areas around police and fire stations andlibraries are often suitable because of their accessibility andsecurity.9.1.1.5 Avoid sitting the containers near chimneys. When-ever possible, the sampling site shall
23、 be more than tenstack-lengths from an operating stack and upwind from it inaccordance with the most frequent wind direction.NOTE 1Do not assume that stacks are unused without making directinquiry.9.1.2 Number of Sites (5)For each region to be surveyed,a minimum of four sampling sites shall be provi
24、ded, to allowfor rejected samples and to provide some evidence for qualityassurance checks. An orderly spacing of the stations should bemade approximately at the vertices of an equilateral triangulargrid. The availability of staff will often be a constraining factor,but it is suggested that the spac
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