Standard Test Method for Thiocyanate in Water

Importancia y uso:

5.1 This test method is useful for analysis of many natural waters that contain thiocyanate from organic decomposition products and waste water discharges. Some industrial wastes, such as those from the metallurgical processing of gold ores, steel industry, petroleum refining, and coal gasification, may contain significant concentrations of thiocyanate. Thiocyanate per se is not recognized as a toxic chemical compound. However, when chlorinated, thiocyanate is converted to the highly toxic and volatile cyanogen chloride at high pH. Oxidation of thiocyanate may also release toxic hydrogen cyanide. The user of the method is advised to perform holding time studies in accordance with Practice D4841 whenever oxidants are present in the samples.

5.1.1 For information on the impact of cyanogens and cyanide compounds, see Appendix X1 of Test Methods D2036.

Subcomité:

D19.06

Referida por:

D3694-96R24

Volúmen:

11.02

Número ICS:

13.060.50 (Examination of water for chemical substances)

Palabras clave:

cyanide; cyanogen chloride; ferric ions; macroreticular resin (XAD-8); spectrophotometer; thiocyanate;