This standard specifies the method for the determination of copper in scale in industrial circulating cooling water. This standard is applicable to the determination of copper content of 0.05% to 1% (0.5 to 10mg/g) in industrial circulating cooling water scale, and also to the determination of boiler water scale.
GB/T 14638.2-1993 history
2021GB/T 14637-2021 Determination of copper,iron and zinc in industrial circulating cooling water and scale—Atomic absorption spectrometric method
2007GB/T 14637-2007 Industrial circulating cooling water and scale.Determination of copper,zinc.Atomic absorption spectrometric method
GB/T 14638.2-1993 Scale in industrial circulating cooling water--Determi copper--Atomic absorption spectrometry was changed to GB/T 14637-2007 Industrial circulating cooling water and scale.Determination of copper,zinc.Atomic absorption spectrometric method.