ASTM-D7284 2008

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D7284-08 Standard Test Method for Total Cyanide in Water by Micro Distillation followed by Flow Injection Analysis with Gas Diffusion Separation and Amperometric Detection

Published By	Publication Date	Number of Pages
ASTM	2008	6

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Categories: 13.060.50 - Examination of water for chemical substances, ASTM

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Description

1.1 This 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.

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

1.3 This procedure is applicable over a range of approximately 2 to 400 ? g/L (parts per billion) total cyanide. Higher concentrations can be measured with sample dilution or lower injection volume.

1.4 The determinative step of this method utilizes flow injection with amperometric detection based on Test Method D 6888 . 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 D 2036 .

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. Specific hazard statements are given in Note 2 and Section 9.

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PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method
2	Significance and Use Interferences Apparatus and Instrumentation FIG. 1
3	Reagents and Materials TABLE 1 FIG. 2
4	Hazards Sample Collection and Preservation Elimination of Interferences Procedure
5	Calibration and Standardization Data Analysis and Calculations Precision and Bias Quality Assurance and Quality Control TABLE 2
6	Keywords TABLE 3

Additional information

Standard Title	D7284-08 Standard Test Method for Total Cyanide in Water by Micro Distillation followed by Flow Injection Analysis with Gas Diffusion Separation and Amperometric Detection
Published Code	ASTM
Publication Date	2008
Pages Count	6
ICS Codes	13.060.50 - Examination of water for chemical substances

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ASTM-D7284 2008

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