ASTM D4691-2017 Standard Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry《采用火焰原子吸收光谱法测量水中元素的标准实施规程》.pdf
《ASTM D4691-2017 Standard Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry《采用火焰原子吸收光谱法测量水中元素的标准实施规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM D4691-2017 Standard Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry《采用火焰原子吸收光谱法测量水中元素的标准实施规程》.pdf(11页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D4691 11D4691 17Standard Practice forMeasuring Elements in Water by Flame Atomic AbsorptionSpectrophotometry1This standard is issued under the fixed designation D4691; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, th
2、e year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice covers general considerations for the quantitative determination of elements in water and was
3、te water by flameatomic absorption spectrophotometry. Flame atomic absorption spectrophotometry is simple, rapid, and applicable to a largenumber of elements in drinking water, surface waters, and domestic and industrial wastes. While some waters may be analyzeddirectly, others will require pretreat
4、ment.1.2 Detection limits, sensitivity, and optimum ranges of the elements will vary with the various makes and models ofsatisfactory atomic absorption spectrometers. The actual concentration ranges measurable by direct aspiration are given in thespecific test method for each element of interest. In
5、 the majority of instances the concentration range may be extended lower byuse of electrothermal atomization and conversely extended upwards by using a less sensitive wavelength or rotating the burnerhead. Detection limits by direct aspiration may also be extended through sample concentration, solve
6、nt extraction techniques, orboth. Where direct aspiration atomic absorption techniques do not provide adequate sensitivity, the analyst is referred to PracticeD3919 or specialized procedures such as the gaseous hydride method for arsenic (Test Methods D2972) and selenium (TestMethods D3859), and the
7、 cold vapor technique for mercury (Test Method D3223).1.3 Because of the differences among various makes and models of satisfactory instruments, no detailed operating instructionscan be provided. Instead the analyst should follow the instructions provided by the manufacturer of a particular instrume
8、nt.1.4 The values stated in either SI or inch-pound units are to be regarded as the standard. The values given in parentheses arefor information only.mathematical conversion to inch-pound units that are provided for information only and are not consideredstandard.1.5 This standard does not purport t
9、o address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use. For specific hazard statements see Section 9.1.6 Thi
10、s international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TB
11、T) Committee.2. Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2972 Test Methods for Arsenic in WaterD3223 Test Method for Total Mercury in WaterD3370 Practices for Sampling Water from Closed ConduitsD3859 Test Methods for Selenium in
12、 WaterD3919 Practice for Measuring Trace Elements in Water by Graphite Furnace Atomic Absorption SpectrophotometryD4453 Practice for Handling of High Purity Water SamplesD5810 Guide for Spiking into Aqueous Samples1 This practice is under the jurisdiction of ASTM Committee D19 on Water and is the di
13、rect responsibility of Subcommittee D19.05 on Inorganic Constituents in Water.Current edition approved Sept. 1, 2011June 1, 2017. Published September 2011June 2017. Originally approved in 1987. Last previous edition approved in 20072011 asD4691 02D4691 11.(2007). DOI: 10.1520/D4691-11.10.1520/D4691-
14、17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only
15、 to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versio
16、nof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D5847 Practice for Writing Quality Contro
17、l Specifications for Standard Test Methods for Water AnalysisE178 Practice for Dealing With Outlying ObservationsE520 Practice for Describing Photomultiplier Detectors in Emission and Absorption SpectrometryE863 Practice for Describing Atomic Absorption Spectrometric Equipment (Withdrawn 2004)33 The
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