Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide

SIGNIFICANCE AND USE
Cyanide is routinely analyzed in water samples, often to demonstrate regulatory compliance; however, improper sample collection or pretreatment can result in significant positive or negative bias potentially resulting in unnecessary permit violations or undetected cyanide releases into the environment.
SCOPE
1.1 This practice is applicable for the collection and preservation of water samples for the analysis of cyanide. This practice also addresses the mitigation of known interferences prior to the analysis of cyanide.
1.2 The sampling, preservation and mitigation of interference procedures described in this practice are recommended for the analysis of total cyanide, available cyanide, weak acid dissociable cyanide, and free cyanide by Test Methods D 2036, D 4282, D 4374, D 6888, D 6994, and D 7237. This practice can also be applied to other cyanide methods, for example, US EPA Method 335.4 and Standard Methods 4500-CN- C.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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.

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Status
Historical
Publication Date
31-Jul-2007
Current Stage
Ref Project

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ASTM D7365-07 - Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D7365–07
Standard Practice for
Sampling, Preservation and Mitigating Interferences in
1
Water Samples for Analysis of Cyanide
This standard is issued under the fixed designation D 7365; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 4282 Test Method for Determination of Free Cyanide in
Water and Wastewater by Microdiffusion
1.1 This practice is applicable for the collection and pres-
D 4374 Test Methods for Cyanides in Water—Automated
ervation of water samples for the analysis of cyanide. This
Methods for Total Cyanide, Weak Acid Dissociable Cya-
practice also addresses the mitigation of known interferences
nide, and Thiocyanate
prior to the analysis of cyanide.
D 4411 Guide for Sampling Fluvial Sediment in Motion
1.2 The sampling, preservation and mitigation of interfer-
D 4840 Guide for Sample Chain-of-Custody Procedures
ence procedures described in this practice are recommended
D 4841 Practice for Estimation of Holding Time for Water
for the analysis of total cyanide, available cyanide, weak acid
Samples Containing Organic and Inorganic Constituents
dissociable cyanide, and free cyanide byTest Methods D 2036,
D 6888 Test Method for Available Cyanide with Ligand
D 4282, D 4374, D 6888, D 6994, and D 7237. This practice
Displacement and Flow InjectionAnalysis (FIA) Utilizing
can also be applied to other cyanide methods, for example, US
-
Gas Diffusion Separation and Amperometric Detection
EPA Method 335.4 and Standard Methods 4500-CN C.
D 6994 Test Method for Determination of Metal Cyanide
1.3 The values stated in SI units are to be regarded as
Complexes in Wastewater, Surface Water, Groundwater
standard. No other units of measurement are included in this
and Drinking Water UsingAnion Exchange Chromatogra-
standard.
phy with UV Detection
1.4 This standard does not purport to address all of the
D 6696 Guide for Understanding Cyanide Species
safety concerns, if any, associated with its use. It is the
D 7237 Test Method for Aquatic Free Cyanide with Flow
responsibility of the user of this standard to establish appro-
Injection Analysis (FIA) Utilizing Gas Diffusion Separa-
priate safety and health practices and determine the applica-
tion and Amperometric Detection
bility of regulatory limitations prior to use.
3
2.2 U.S. EPA Methods:
2. Referenced Documents
EPA OIA-1677
2
EPA Method 335.2
2.1 ASTM Standards:
EPA Method 335.4
D 1129 Terminology Relating to Water
4
2.3 APHA Standard:
D 1193 Specification for Reagent Water
Standard Methods 4500-CN Methods C, D, E, F, G, and I
D 1293 Test Methods for pH of Water
5
2.4 USGS Methods:
D 2036 Test Methods for Cyanides in Water
USGS I-3300-85
D 3370 Practices for SamplingWater from Closed Conduits
USGS I-4302-85
D 3694 Practices for Preparation of Sample Containers and
for Preservation of Organic Constituents
3. Terminology
D 3856 Guide for Good Laboratory Practices in Laborato-
3.1 Definitions:
ries Engaged in Sampling and Analysis of Water
1 3
This practice is under the jurisdiction of ASTM Committee D19 on Water and Available from United States Environmental Protection Association (EPA),
is the direct responsibility of Subcommittee D19.06 on Methods for Analysis for Ariel Rios Bldg., 1200 Pennsylvania Ave., NW, Washington, DC 20460, www.ep-
Organic Substances in Water. a.gov.
4
Current edition approved Aug. 1, 2007. Published August 2007. Standard Methods for the Examination of Water and Wastewater, 21st edition
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or (2005),AmericanPublicHealthAssociation(APHA),800IStreet,NWWashington,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM DC 20001, www.apha.org.
5
Standards volume information, refer to the standard’s Document Summary page on Available from United States Geological Survey, 12201 Sunrise Valley Drive,
the ASTM website. Reston, VA, 20192, www.usgs.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D7365–07
For definitions of terms used in this practice, refer to dilute to volume. Warning—This is an exothermic reaction
Terminology D 1129 and Guide D 6696. and the solution will become very hot while being prepared. It
3.2 In this practice, refrigeration shall designate storing the is recommended to place the solution in a water bath to cool.
sample between its freezing point and 6°C. 6.9 Hydrated Lime—Ca(OH) powder.
2
6.10 Cadmium chloride, CdCl .
2
4. Summary of Practice
6.11 Ethylenediamine (EDA)
4.1 Sam
...

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