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ASTM D 7284 : 2013

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Standard Test Method for Total Cyanide in Water by Micro Distillation followed by Flow Injection Analysis with Gas Diffusion Separation and Amperometric Detection

Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

15-06-2013

€67.30
Excluding VAT

CONTAINED IN VOL. 11.02, 2017 Describes the concentration of total cyanide in an aqueous wastewater or effluent.

Committee
D 19
DocumentType
Test Method
Pages
8
ProductNote
Reconfirmed 2013
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This test method is used to determine the concentration of total cyanide in an aqueous wastewater or effluent. The method detects the cyanides that are free (HCN and CN-) and strong-metal-cyanide complexes that dissociate and release free cyanide when refluxed under strongly acidic conditions.

1.2This method may not be applicable to process solutions from precious metals mining operations.

1.3This procedure is applicable over a range of approximately 2 to 500 μg/L (parts per billion) total cyanide. Higher concentrations can be measured with sample dilution or lower injection volume.

1.4The determinative step of this method utilizes flow injection with amperometric detection based on Test Method D6888. Prior to analysis, samples must be distilled with a micro-distillation apparatus described in this test method or with a suitable cyanide distillation apparatus specified in Test Methods D2036.

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 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. Specific hazard statements are given in 8.6 and Section 9.

ASTM D 7572 : 2015 Standard Guide for Recovery of Aqueous Cyanides by Extraction from Mine Rock and Soil
ASTM D 2036 : 2009 : R2015 Standard Test Methods for Cyanides 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 D 1129 : 2013 : REDLINE Standard Terminology Relating to Water
ASTM D 2777 : 2013 : REDLINE Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
ASTM D 6696 : 2016 : REDLINE Standard Guide for Understanding Cyanide Species
ASTM D 6888 : 2016 : REDLINE Standard Test Method for Available Cyanides with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection

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