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Standard Test Method for Determination of Free Cyanide in Water and Wastewater by Microdiffusion
Automatische name übersetzung:
Standard Test Methode zur Bestimmung von freiem Cyanid in Wasser und Abwasser durch Mikrodiffusion
NORM herausgegeben am 15.7.2015
Bezeichnung normen: ASTM D4282-15
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 15.7.2015
SKU: NS-613018
Zahl der Seiten: 6
Gewicht ca.: 18 g (0.04 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
free cyanide, hexacyanoferrate, instability, microdiffusion, micropipet, pyridine-barbaturic acid, spectrophotometer, wastewater,, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||||||||||
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. |
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1. Scope | ||||||||||||||||||||||
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. |
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2. Referenced Documents | ||||||||||||||||||||||
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Historisch
15.7.2015
Historisch
1.1.2013
Historisch
15.6.2012
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1.1.2013
Historisch
1.1.2013
Historisch
1.5.2011
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