ASTM D6800-2012 red 2500 Standard Practice for Preparation of Water Samples Using Reductive Precipitation Preconcentration Technique for ICP-MS Analysis of Trace Metals《微量金属的电感耦合等离.pdf
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1、Designation:D680002 (Reapproved 2007)1Designation: D6800 12Standard Practice forPreparation of Water Samples Using Reductive PrecipitationPreconcentration Technique for ICP-MS Analysis of TraceMetals1This standard is issued under the fixed designation D6800; the number immediately following the desi
2、gnation indicates the year oforiginal adoption or, in the case of revision, the 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 Scope*1.1 Toxic elements may be p
3、resent in ambient waters and may enter the food chain via uptake by plants and animals; the actualconcentrations of toxic metals are usually sub-ng/mL. The U.S. EPA has published its Water Quality Standards in the U.S. FederalRegister 40 CFR 131.36, Minimum requirements for water quality standards s
4、ubmission, Ch. I (7-1-00 Edition), see Annex, TableA1.1. The U.S. EPA has also developed Method 1640 to meet these requirements, see Annex, Table A1.2.1.2 Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) is a technique with sufficient sensitivity to routinely measuretoxic elements in ambient wa
5、ters, both fresh and saline (Test Method D5673). However saline and hard water matrices poseanalytical challenges for direct multielement analysis by ICP-MS at the required sub-ng/mL levels.1.3 This standard practice describes a method used to prepare water samples for subsequent multielement analys
6、is usingICP-MS. The practice is applicable to seawater and fresh water matrices, which may be filtered or digested. Samples prepared bythis method have been analyzed by ICP-MS for the elements listed in Annex, Table A1.3).1.41.4 The values stated in SI units are to be regarded as standard. No other
7、units of measurement are included in this standard.1.5 This standard does not purport to 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 r
8、egulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD5673 Test Method for Elements in Water by Inductively Coupled PlasmaMass SpectrometryD5810D5810 Guide for Spiking into Aqueous SamplesD5847 Practice f
9、or Writing Quality Control Specifications for Standard Test Methods for Water Analysis2.2 Other Documents:U.S. Federal Register 40 CFR 131.36, Minimum Requirements for Water Quality Standards Submission, Ch. I (7-1-00 Edition)3U.S. EPA Method 1640, Determination of Trace Elements in Water by Preconc
10、entration and Inductively Coupled Plasma-MassSpectrometry (1997)4U.S. EPA Method 1669, Sampling Ambient Water for Trace Metals at EPA Water Quality Criteria Levels43. Terminology3.1 DefinitionsFor definitions of terms used in this test method refer to Terminology D1129.3.2 Definitions of Terms Speci
11、fic to This Standard:3.2.1 dissolvedthe concentration of elements determined on a filtered fraction of a sample. Samples are filtered through a 0.451This practice is under the jurisdiction of ASTM Committee D19 on Water and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituent
12、s in Water.Current edition approved Aug.March 1, 2007.2012. Published September 2007.March 2012. Originally approved in 2002. Last previous edition approved in 20022007 asD6800 02(2007)e01. DOI: 10.1520/D6800-02R07E01.10.1520/D6800-12.2For referencedASTM standards, visit theASTM website, www.astm.or
13、g, 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.3Available from DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 191115098.4Available from United States Environm
14、ental Protection Agency (EPA), Ariel Rios Bldg., 1200 Pennsylvania Ave., NW, Washington, DC 20460, http:/www.epa.gov.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may
15、 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 versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the
16、 end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.m membrane filter before acid preservation. intermediate stock-standard solution, na diluted solution prepared from one ormore of the stock-standard solutions.3.2.2
17、 intermediate stock standard solutiona diluted solution prepared from one or more of the stock standard solutions.laboratory control sample (LCS), nan aliquot of solution with known concentrations of method analytes.3.2.2.1 DiscussionThe LCS should be obtained from a reputable source or prepared at
18、the laboratory from a separate sourcefrom the calibration standards. The LCS is analyzed using the same sample preparation, analytical method and QA/QC procedureused for test samples. Its purpose is to determine whether method performance is within accepted control limits.3.2.3 laboratory control sa
19、mple (LCS)an aliquot of solution with known concentrations of method analytes. It should beobtained from a reputable source or prepared at the laboratory from a separate source from the calibration standards. The LCS isanalyzed using the same sample preparation, analytical method and QA/QC procedure
20、 used for test samples. Its purpose is todetermine whether method performance is within accepted control limits. laboratory duplicate (LD), na second sample aliquotthat is analyzed using the same sample preparation, analytical method and QA/QC procedure used for test samples.3.2.3.1 DiscussionThe pu
21、rpose of the LD is to determine whether method performance is within accepted control limits.3.2.4 laboratory duplicate (LD)a second aliquot of a sample should be analyzed using the same sample preparation, analyticalmethod and QA/QC procedure used for test samples. Its purpose is to determine wheth
22、er method performance is within acceptedcontrol limits.3.2.5matrix spike (MS)a second aliquot of a sample to which known concentrations of target analyte(s) are added in thelaboratory and should be analyzed using the same sample preparation and analytical method used for test samples. Its purpose is
23、to determine whether the sample matrix contributes bias to the analytical results. The background concentration of the matrix mustbe determined in a separate aliquot and the measured values in the MS corrected for the concentrations found. Recommended spikelevels are listed in Annex, matrix spike (M
24、S), na second sample aliquot to which known concentrations of target analyte(s) areadded in the laboratory and which are analyzed using the same sample preparation and analytical method used for test samples.3.2.4.1 DiscussionThe purpose of the MS is to determine whether the sample matrix contribute
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