GB/T 14636-2021 (English Version) PDF

Scope: This document specifies the determination method of calcium and magnesium content in industrial circulating cooling water and scale in boiler water system or circulating water system - atomic absorption spectrometry. This document is applicable to the determination of calcium content 0.5 mg/L~75 mg/L and magnesium content 0.1 mg/L~50 mg/L in industrial circulating cooling water, and the determination of calcium content ≥ 0.005% and magnesium content ≥ 0.005% in scale. This document is also applicable to the determination of calcium and magnesium content in scale of various other industrial water, raw water and water systems, and the determination of calcium content in phosphorus-zinc pre-coating solution for industrial circulating cooling water.

GB/T 14636-2021 Referenced Document

DL/T 1151.2 Analytical methods of scale and corrosion products in power plants.Part 2:Sampling and dissolving method for scale and corrosion products
GB/T 4470 Analytical spectroscopic methods-Flame emission,atomic absorption and atomic fluorescence-Vocabulary
GB/T 602 Chemical reagent--Preparations of standard solutions for impurity
GB/T 6682-2008 Water for analytical laboratory use.Specification and test methods
HG/T 3530 Industrial circulating cooling water.Sampling and production for sludge and corrosion products

2021 GB/T 14636-2021 Determination of calcium and magnesium in industrial circulating cooling water and scale—Atomic absorption spectrometric method
2007 GB/T 14636-2007 Industrial circulating cooling water.Determination of calcium,magnesium.Atomic absorption spectrometric method
1993 GB/T 14636-1993 Industrial circulating cooling water--Determination of calcium--Atomic absorption spectrometry