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ASTM D4282-15

Current Revision

Standard Test Method for Determination of Free Cyanide in Water and Wastewater by Microdiffusion

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1.1 This test method covers the determination of free cyanides in waters and wastewaters. Free cyanide is here defined as the cyanide which diffuses as cyanide (HCN), at room temperature, from a solution at pH 6.2

1.2 This test method does not include complexes that resist dissociation, such as hexacyanoferrates and gold cyanide, nor does it include thiocyanate and cyanohydrin.

1.3 This test method may be applied to water and wastewater samples containing free cyanide from 10 to 150 μg/L. Greater concentrations may be determined by appropriate dilution.

1.4 This test method has been fully validated by collaborative testing as specified by Practice D2777.

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6 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. For specific hazard statements, see 8.6, 8.9, Section 9, and 12.2.1.


5.1 This test method is useful in distinguishing between the potentially available free cyanide (total cyanide) and the free cyanide actually present.

5.2 This test method provides a convenient technique for making on-site free cyanide determinations.

SDO ASTM: ASTM International
Document Number D4282
Publication Date July 15, 2015
Language en - English
Page Count 6
Revision Level 15
Supercedes
Committee D19.06
Publish Date Document Id Type View
July 15, 2015 D4282-15 Revision
July 10, 2002 D4282-02 Revision
Jan. 1, 2001 D4282-95 Revision
May 1, 2022 D4282-15R22 Reaffirmation
Feb. 1, 2015 D4282-02R15 Reaffirmation
June 15, 2010 D4282-02R10 Reaffirmation
Jan. 1, 2001 D4282-95R01 Reaffirmation