Reference number
ISO 2761:1975
ISO 2761:1975
Crude sodium borates for industrial use — Determination of total titanium content — Photometric method
Edition 1
1975-03
Withdrawn
ISO 2761:1975
7741
Withdrawn (Edition 1, 1975)

Abstract

Applicable to products having contents up to 0.1 % (m/m). The method specified is not applicable in the presence of vanadium or high silica content. Molybdenum and chromium also interfere. The analysis bases on fusion of a test portion with sodium corbonate, extraction of the cooled melt with suphuric acid and the addition of hydrogen peroxide. Photometric measurement of the yellow coloured complex formed at a wavelength of about 420 nm.

General information

  •  : Withdrawn
     : 1975-03
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 2
  • ISO/TC 47
    71.060.50 
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