规定的三种方法适用于每升氰化物含量低于50 mg和每升氰化物总含量低于100 mg的水，但更高的浓度可通过适当稀释样品来确定。方法的适用范围如下:吡啶/巴比妥酸光度法:0002-0025mg；使用廷德尔效应的滴定法:>；0005毫克；使用指示剂的滴定法:>；0.05毫克。表1列出了干扰测定的离子和化合物。

The three methods specified are applicable to water containing less than 50 mg per litre and less than 100 mg of total cyanide per litre, but higher concentrations may be determined by suitable dilution of the sample. The methods suitable and corresponding ranges are as follows: photometric method with pyridine/barbituric acid: 0,002 to 0,025 mg; titrimetric method using the tyndall effect: > 0,005 mg; titrimetric method using an indicator: > 0,05 mg. Ions and compounds interfering with the determination are listed in table 1.