ISO 1232:1976 ✓ Most Recent [ Withdrawn ]

715264

Aluminium oxide primarily used for the production of aluminium -- Determination of silica content -- Reduced molybdosilicate spectrophotometric method

standard by International Organization for Standardization , 09/01/1976

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The method is applicable to products having a silica content between 0.005 % (m/m) and 0.025 % (m/m) provided that the content of phosphorus pentoxide plus vanadium pentoxide does not exceed 0.02 % (m/m). The principle of the method is based on the formation of oxidized molybdosilicate (yellow) under well-defined conditions of acidity, concentration of reagents, temperature and time. Selective reduction of the complex in a highly acidic medium of sulphuric acid and in the presence of tartaric acid. Spectrophotometric measurement of the reduced coloured complex at a wavelength of about 815 nm. - Replaces ISO Recommendation R 1232-1970.

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Product Details

Published:

09/01/1976

Number of Pages:

5

File Size:

1 file

Same As:

BS 4140-5:1986

Note:

This product is restricted and cannot be purchased in the following countries Ukraine, Russia, Belarus