ISO 2761:1975
Crude sodium borates for industrial use; Determination of total titanium content; Photometric method
- Standard No.
- ISO 2761:1975
- Release Date
- 1975
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 2761:1975
- Scope
- 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.
ISO 2761:1975 history
- 1975 ISO 2761:1975 Crude sodium borates for industrial use; Determination of total titanium content; Photometric method
