Reference number
ISO 3238:1975
© ISO 2024
ISO 3238:1975
Sodium sulphate for industrial use — Determination of calcium content — EDTA complexometric method
Edition 1
1975-07
Withdrawn
Withdrawn (Edition 1, 1975)

Abstract

Applicable to products the Ca content of which exceeds 0.002 % (m/m). Extraction of a test portion with dilute acid and separation of the insoluble residue. Titration of the calcium with standard volumetric disodium ethylenediamine-NNN'N'-tetra-acetate dihydrate (EDTA) solution in the presence of glyoxal-bis(hydoxy-2-anil) as indicator.

General information

  • Status
     : Withdrawn
    Publication date
     : 1975-07
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 47
    ICS :
    71.060.50 
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