适用于氯化物含量（以氯表示）等于或大于0.005%（m/m）的产品。其原理是在硼酸存在下，用硝酸银沉淀氯离子。在黑色背景下，使用纳氏管比较试验溶液与标准匹配溶液的乳光。浊度法评估沉淀质量。

Applicable to products having a chlorides content, expressed as chlorine, of equal to or more than 0.005 % (m/m). The principle consists in precipitation, in the presence of boric acid, of chloride ions with silver nitrate. Comparison of the opalescence of the test solution with that of standard matching solutions using Nessler tubes against a black background. Turbidimetric evaluation of the mass of precipitate.