ASTM D6508-10

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it 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 version
of the standard as published by ASTM is to be considered the official document.
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Designation:D6508–00 (Reapproved 2005) Designation: D6508 – 10
Standard Test Method for
Determination of Dissolved Inorganic Anions in Aqueous
Matrices Using Capillary Ion Electrophoresis and Chromate
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Electrolyte
This standard is issued under the fixed designation D6508; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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´ NOTE—Warning notes were moved into the text in January 2005.
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´ NOTE—Added research report reference to Section 17 editorially in March 2008.
1. Scope*
1.1 This test method covers the determination of the inorganic anions fluoride, bromide, chloride, nitrite, nitrate, ortho-
phosphate, and sulfate in drinking water, wastewater, and other aqueous matrices using capillary ion electrophoresis (CIE) with
indirect UV detection. See Figs. 1-6.
1.2 The test method uses a chromate-based electrolyte and indirect UV detection at 254 nm. It is applicable for the
determination or inorganic anions in the range of 0.1 to 50 mg/L except for fluoride whose range is 0.1 to 25 mg/L.
1.3 It is the responsibility of the user to ensure the validity of this test method for other anion concentrations and untested
aqueous matrices.
NOTE 1—The highest accepted anion concentration submitted for precision and bias extend the anion concentration range for the following anions:
Chloride to 93 mg/L, Sulfate to 90 mg/L, Nitrate to 72 mg/L, and ortho-phosphate to 58 mg/L.
1.4
1.4 The values stated in SI units are to be regarded as standard. No other 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 responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. For specific hazard statements, see Section 9.
2. Referenced Documents
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2.1 ASTM Standards:
D1066
D1066 Practice for Sampling Steam
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits
D3856 Guide for Good Laboratory Practices in Laboratories Engaged in Sampling and Analysis of Water
D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
D5905
D5905 Practice for the Preparation of Substitute Wastewater
F488 Test Method for On-Site Screening of Heterotrophic Bacteria in Water
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology D1129.
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ThistestmethodisunderthejurisdictionofASTMCommitteeD19onWaterandisthedirectresponsibilityofSubcommitteeD19.05onInorganicConstituentsinWater.
Current edition approved Jan. 13, 2005. Published April 2005.
Originally approved in 2000. Last previous edition approved in 2000 as D6508–00. DOI: 10.1520/D6508-00R05E02.
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Current edition approved Sept. 1, 2010. Published October 2010. Originally approved in 2000. Last previous edition approved in 2005 as D6508 – 00 (2005) . DOI:
10.1520/D6508-10.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6508 – 10
FIG. 1 Electropherogram of Mixed Anion Working Solution and
Added Common Organic Acids
FIG. 2 Electropherogram of 0.2 mg/L Anions Used to Determine
MDL
FIG. 3 Electropherogram of Substitute Wastewater
3.2 Definitions of Terms Specific to This Standard:
3.2.1 capillary ion electrophoresis, n—an electrophoretic technique in which a UV-absorbing electrolyte is placed in a 50 µm
to 75 µm fused-silica capillary.
3.2.1.1 Discussion—Voltage is applied across the capillary causing electrolyte and anions to migrate towards the anode and
through the capillary’s UV detector window. Anions are separated based upon the their differential rates of migrat
...