ASTM D 7237 : 2018
Current
The latest, up-to-date edition.
Standard Test Method for Free Cyanide and Aquatic Free Cyanide with Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection
Hardcopy , PDF
English
10-01-2019
This test method is used to establish the concentration of free cyanide in an aqueous wastewater, effluent and in-stream free cyanide concentrations after mixing treated water with receiving water.
Committee |
D 19
|
DocumentType |
Test Method
|
Pages |
11
|
PublisherName |
American Society for Testing and Materials
|
Status |
Current
|
Supersedes |
1.1This test method is used to establish the concentration of free cyanide in an aqueous wastewater, effluent and in-stream free cyanide concentrations after mixing treated water with receiving water. The test conditions of this test method are used to measure free cyanide (HCN and CN–) and cyanide bound in the metal-cyanide complexes that are easily dissociated into free cyanide ions at the pH of 6. Free cyanide is determined at pH 6 at room temperature. The aquatic free cyanide can be determined by matching the pH to the water in the receiving environment in the range of pH 6 to 8. The extent of HCN formation is less dependent on temperature than the pH; however, the temperature can be regulated if deemed necessary for aquatic free cyanide to further simulate the actual aquatic environment.
1.2The free cyanide test method is based on the same instrumentation and technology that is described in Test Method D6888, but employs milder conditions (pH 6–8 buffer versus HCl or H2SO4 in the reagent stream), and does not utilize ligand displacement reagents.
1.3The aquatic free cyanide measured by this procedure should be similar to actual levels of HCN in the original aquatic environment. This in turn may give a reliable index of toxicity to aquatic organisms.
1.4This procedure is applicable over a range of approximately 5 to 500 μg/L (parts per billion) free cyanide. Sample dilution may increase cyanide recoveries depending on the cyanide speciation; therefore, it is not recommended to dilute samples. Higher concentrations can be analyzed by increasing the range of calibration standards or with a lower injection volume. In accordance with Guide E1763 and Practice D6512 the lower scope limit was determined to be 9 μg/L for chlorinated gold leaching barren effluent water and the IQE10 % is 12 µg/L in the gold processing detoxified reverse osmosis permeate waste water sample matrix.
1.5The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6This test method is not recommended for samples that contain reduced sulfur compounds such as sulfides.
1.7This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in 8.6 and Section 9.
1.8This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D 7572 : 2015 | Standard Guide for Recovery of Aqueous Cyanides by Extraction from Mine Rock and Soil |
ASTM D 4193 : 2008 : R2013 : EDT 1 | Standard Test Method for Thiocyanate in Water |
ASTM D 7365 : 2009 : REV A : R2015 | Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide |
ASTM E 2242 : 2013 | Standard Test Method for Column Percolation Extraction of Mine Rock by the Meteoric Water Mobility Procedure |
ASTM D 6696 : 2016 | Standard Guide for Understanding Cyanide Species |
ASTM E 1600 : 2015 | Standard Test Methods for Determination of Gold in Cyanide Solutions |
ASTM D 7365 : 2007 | Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide |
ASTM D 4841 : 1988 : R2008 | Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents |
ASTM D 4658 : 2003 | Standard Test Method for Sulfide Ion in Water |
ASTM D 1129 : 2003 | Standard Terminology Relating to Water |
ASTM D 4658 : 2008 | Standard Test Method for Sulfide Ion in Water |
ASTM D 7365 : 2009 | Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide |
ASTM D 4841 : 1988 : R2018 | Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents |
ASTM D 1129 : 2013 | Standard Terminology Relating to Water |
ASTM D 1129 : 2013 : R2020 | Standard Terminology Relating to Water |
ASTM D 2036 : 1991 | Standard Test Methods for Cyanides in Water |
ASTM D 5847 : 1999 : REV A : EDT 1 | Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis |
ASTM D 6888 : 2003 | Standard Test Method for Available Cyanide with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection |
ASTM D 4658 : 2009 | Standard Test Method for Sulfide Ion in Water |
ASTM D 2777 : 2012 | Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water |
ASTM D 1129 : 2013 : R2020 : EDT 2 | Standard Terminology Relating to Water |
ASTM D 6696 : 2016 | Standard Guide for Understanding Cyanide Species |
ASTM D 1193 : 1977 : R1983 : EDT 1 | Standard Specification for Reagent Water |
ASTM D 4841 : 1988 : R1998 | Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents |
ASTM D 5847 : 2002 : R2007 | Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis |
ASTM D 2036 : 2009 : R2022 | Standard Test Methods for Cyanides in Water |
ASTM D 4658 : 2015 | Standard Test Method for Sulfide Ion in Water (Withdrawn 2024) |
ASTM D 6888 : 2016 | Standard Test Method for Available Cyanides with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection |
ASTM D 6696 : 2010 | Standard Guide for Understanding Cyanide Species |
ASTM D 1129 : 2006 | Standard Terminology Relating to Water |
ASTM D 6696 : 2014 | Standard Guide for Understanding Cyanide Species |
ASTM E 691 : 2020 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM D 2777 : 2003 | Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water |
ASTM D 2777 : 2021 | Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water |
ASTM D 4841 : 1988 : R2003 | Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents |
ASTM D 2777 : 2013 | Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water |
ASTM D 7365 : 2009 : REV A | Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide |
ASTM D 4841 : 1988 : R2013 | Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents |
ASTM D 6696 : 2005 : EDT 1 | Standard Guide for Understanding Cyanide Species |
ASTM D 5847 : 2002 : R2012 | Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis |
ASTM D 2777 : 1998 | Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water |
ASTM D 1129 : 2013 : R2020 : EDT 1 | Standard Terminology Relating to Water |
ASTM D 2036 : 2009 : R2015 | Standard Test Methods for Cyanides in Water |
ASTM D 1129 : 1999 : REV A | Standard Terminology Relating to Water |
ASTM D 2036 : 1998 | Standard Test Methods for Cyanides in Water |
ASTM E 691 : 2019 : EDT 1 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM D 6888 : 2009 | Standard Test Method for Available Cyanide with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection |
ASTM D 3856 : 2011 | Standard Guide for Management Systems in Laboratories Engaged in Analysis of Water |
ASTM D 1129 : 2006 : REV A | Standard Terminology Relating to Water |
ASTM E 691 : 2023 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM D 1193 : 2006 : R2011 | Standard Specification for Reagent Water |
ASTM E 1601 : 2019 | Standard Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method |
ASTM D 6888 : 2004 | Standard Test Method for Available Cyanide with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection |
ASTM D 5847 : 2002 : R2020 | Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis |
ASTM D 1129 : 2003 : REV A | Standard Terminology Relating to Water |
ASTM D 1129 : 2002 | Standard Terminology Relating to Water |
ASTM E 1601 : 1998 | Standard Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method |
ASTM D 6696 : 2005 | Standard Guide for Understanding Cyanide Species |
ASTM D 1293 : 1999 | Standard Test Methods for pH of Water |
ASTM E 1601 : 2010 | Standard Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method |
ASTM D 6888 : 2016 : R2023 | Standard Test Method for Available Cyanides with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection |
ASTM D 6512 : 2003 | Standard Practice for Interlaboratory Quantitation Estimate |
ASTM D 2036 : 2009 | Standard Test Methods for Cyanides in Water |
ASTM E 691 : 2022 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM E 1763 : 2006 | Standard Guide for Interpretation and Use of Results from Interlaboratory Testing of Chemical Analysis Methods (Withdrawn 2015) |
ASTM D 6696 : 2016 : R2023 | Standard Guide for Understanding Cyanide Species |
ASTM E 691 : 2009 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM D 1193 : 1991 | Standard Specification for Reagent Water |
ASTM D 3856 : 1995 : R2006 | Standard Guide for Good Laboratory Practices in Laboratories Engaged in Sampling and Analysis of Water |
ASTM D 7728 : 2018 | Standard Guide for Selection of ASTM Analytical Methods for Implementation of International Cyanide Management Code Guidance |
ASTM D 1293 : 1999 : R2005 | Standard Test Methods for pH of Water |
ASTM E 1601 : 2012 | Standard Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method |
ASTM D 1129 : 2004 | Standard Terminology Relating to Water |
ASTM D 5847 : 2022 | Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis |
ASTM D 2777 : 2008 | Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water |
ASTM D 4658 : 1992 : R1996 | Standard Test Method for Sulfide Ion in Water |
ASTM D 3856 : 2011 : R2015 | Standard Guide for Management Systems in Laboratories Engaged in Analysis of Water (Withdrawn 2024) |
ASTM D 1293 : 2018 | Standard Test Methods for pH of Water |
ASTM E 691 : 2021 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM D 2777 : 2006 | Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water |
ASTM D 3856 : 1995 : R2000 | Standard Guide for Good Laboratory Practices in Laboratories Engaged in Sampling and Analysis of Water |
ASTM D 6696 : 2001 | Standard Guide for Understanding Cyanide Species |
ASTM D 1129 : 2002 : REV A | Standard Terminology Relating to Water |
ASTM D 5847 : 2002 | Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis |
ASTM E 1763 : 1998 | Standard Guide for Interpretation and Use of Results from Interlaboratory Testing of Chemical Analysis Methods |
ASTM D 7365 : 2009 : REV A : R2015 | Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide |
ASTM D 6512 : 2007 | Standard Practice for Interlaboratory Quantitation Estimate |
ASTM D 1193 : 1970 | Standard Specification For Reagent Water |
ASTM D 4841 : 1988 : R2013 : EDT 1 | Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents |
ASTM D 1193 : 2006 | Standard Specification for Reagent Water |
ASTM D 7728 : 2011 | Standard Guide for Selection of ASTM Analytical Methods for Implementation of International Cyanide Management Code Guidance |
ASTM D 1293 : 2012 | Standard Test Methods for pH of Water |
ASTM D 1193 : 1999 | Standard Specification for Reagent Water |
ASTM D 1129 : 2010 | Standard Terminology Relating to Water |
ASTM D 2036 : 2006 | Standard Test Methods for Cyanides in Water |
ASTM D 1129 : 2006 : REV A : EDT 1 | Standard Terminology Relating to Water |
ASTM D 1129 : 2001 | Standard Terminology Relating to Water |
ASTM D 1129 : 2004 : EDT 1 | Standard Terminology Relating to Water |
ASTM D 1193 : 2006 : R2018 | Standard Specification for Reagent Water |
ASTM D 2777 : 2008 : EDT 1 | Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water |
ASTM D 6512 : 2000 | Standard Practice for Interlaboratory Quantitation Estimate |
ASTM D 1293 : 1984 : R1990 | Standard Test Methods for pH of Water |
ASTM D 7365 : 2009 : REV A : R2022 | Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide |
ASTM D 6512 : 2007 : R2014 | Standard Practice for Interlaboratory Quantitation Estimate (Withdrawn 2023) |
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