Conditional Test Method (CTM) 033
Method XHCN Sampling and Analysis for Hydrogen Cyanide Emissions from Stationary Sources
Method HXCN is applicable to the collection and analysis of hydrogen cyanide (HCN) in the gas phase and in suspended water droplets. This revised draft method, which is designed to be tolerant to higher acid levels is recommended for use on hazardous waste incinerators, coal-fired power plants, and similar combustion sources. In spite of the failed field test, this is the best documented and verified method available for sampling HCN from stationary sources.