规定的方法的原理是将测量的气体通过滴定池，其中水被阳极溶液吸收。通过卡尔·费休反应测定水所需的碘由碘化物电量计测定。电量与产生的碘质量成正比，因此与所测定的水质量成正比。适用于不与卡尔·费休试剂反应的天然气和其他气体。适用于5 mg/cm ^ 3至5000 mg/cm ^ 3之间的水分浓度

The principle of the method specified is passing a measured volume of gas through the titration cell, where the water is absorbed by the anodic solution. The iodine required for the determination of water by the Karl Fischer reaction is generated coulometrically from iodide. The quantity of electricity is directly proportional to the mass of iodine generated and hence to the mass of water determined. Applies to natural gas and other gases which do not react with Karl Fischer reagents. Is applicable to water concentrations between 5 mg/cm^3 and 5000 mg/cm^3.