Is it recommended to digest a sample prior to testing for cyanide?

Document ID

Document ID TE1095

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
Is it recommended to digest a sample prior to testing for cyanide?
Summary
Digestion and testing for cyanide
Answer
It is not recommended to digest a sample being tested for cyanide. When a cyanide sample is acidified, the cyanide creates a hydrogen cyanide gas which is very toxic and can be lethal. To remove interferences from a sample, distillation is required. The distillation produces the same HCN gas, but it is trapped within the distillation apparatus.