本文件规定了用卡尔费休法测定含水量的库仑法。该方法适用于天然气和其他不与卡尔费休（KF）试剂反应的气体。 它适用于5 mg/m3到5 000 mg/m3之间的水浓度。体积表示为温度为273.15 K（0°C），压力为101325 kPa（1 atm）。

This document specifies a coulometric procedure for the determination of water content by the Karl Fischer method. The method is applicable to natural gas and other gases which do not react with Karl Fischer (KF) reagents. It applies to water concentrations between 5 mg/m3 and 5 000 mg/m3. Volumes are expressed at temperature of 273,15 K (0 °C) and a pressure of 101,325 kPa (1 atm).