ASTM-D6888 › Historical Revision Information
Standard Test Method for Available Cyanide with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection
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Scope
1.1 This method is used to determine the concentration of available inorganic cyanide in an aqueous wastewater or effluent. The method detects the cyanides that are free (HCN and CN-) and metal-cyanide complexes that are easily dissociated into free cyanide ions. The method does not detect the less toxic strong metal-cyanide complexes, cyanides that are not “amenable to chlorination.”
1.2 Total cyanide can be determined for samples that have been distilled as described in Test Methods D 2036
1.3 This procedure is applicable over a range of approximately 2 to 400 μg/L (parts per billion) available cyanide. Higher concentrations can be analyzed by dilution or lower injection volume.
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. Specific hazard statements are given in Note 2 and Section 9.
Significance and Use
Cyanide and hydrogen cyanide are highly toxic. Regulations have been established to require the monitoring of cyanide in industrial and domestic wastes and surface waters.
This test method is applicable for natural water, saline waters, and wastewater effluent.
The method may be used for process control in wastewater treatment facilities.
Keywords
amperometry; available cyanide; cyanide; cyanide amenable to chlorination; flow injection analysis; free cyanide; gas diffusion membrane; ligand exchange; silver electrode; weak acid dissociable cyanide; Amperometric titration; Cyanides; Flow injection analysis (FIA); Free cyanide; Gas diffusion; Ligand displacement; Pervaporation (PV); Weak acid-dissociable (WAD) cyanide; ICS Number Code 17.120.10 (Flow in closed conduits)
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Document Number
ASTM-D6888-09
Revision Level
2009 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Oct. 1, 2009
Document Type
Test Method
Page Count
7 pages
Committee Number
D19.06