HG/T 3520-2015
Determination of calcium for phosphorus-zine prefilming fluid in industrial circulating cooling water (English Version)

Standard No.

HG/T 3520-2015

Language

Chinese, Available in English version

Release Date

2015

Published By

Professional Standard - Chemical Industry

Latest

HG/T 3520-2015

Replace

HG/T 3520-2000

Scope

This standard specifies the EDTA titration method for the determination of calcium ion content in phosphorus-zinc pre-film solutions of industrial circulating cooling water using polyphosphate and zinc salt as pre-film agents. This standard is applicable to the determination of calcium ion content in the phosphorus-zinc pre-film solution of industrial circulating cooling water between 20 mg/L and 200 mg/L.

HG/T 3520-2015 Referenced Document

• GB/T 601 Chemical reagent.Preparations of reference titration solutions*， 2016-10-13 Update
• GB/T 6682 Water for analytical laboratory use.Specification and test methods

HG/T 3520-2015 history

• 2015 HG/T 3520-2015 Determination of calcium for phosphorus-zine prefilming fluid in industrial circulating cooling water
• 2000 HG/T 3520-2000 Industrial circulating cooling water Determination of calcium For phosphorus-zine prefilmingtluid
• 0000 HG/T 3520-1985