适用于含水量在0.01%（m/m）和0.5%（m/m）之间的产品。由ISO 3700补充，仅供参考。基于向含有5%无水氟化氢的冷却干燥吡啶中添加冷却试验部分。用于测量试样和滴定的仪器以及测量容器均以图形显示。随后用卡尔费休试剂对水进行电位滴定。

Applicable to products having a water content between 0.01 % (m/m) and 0.5 % (m/m). Is supplemented by ISO 3700 and intended for reference purposes. Bases on addition of a cooled test portion to cooled dry pyridine containing 5 % of anhydous hydrogen fluoride. The apparatus for measuring the test portion and titration and the measuring vessel are shon in figures. Subsequent electrometric titration of the water with the Karl Fischer reagent.