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ISO 1232:1976 PDF

ISO 1232:1976 PDF

Name:
ISO 1232:1976 PDF

Published Date:
09/01/1976

Status:
[ Withdrawn ]

Description:

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

Publisher:
International Organization for Standardization

Document status:
Active
Format:
Electronic (PDF)
Delivery time:
10 minutes
Delivery time (for Russian version):
200 business days
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$15.3
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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.


File Size : 1 file , 470 KB
Note : This product is unavailable in Ukraine, Russia, Belarus
Number of Pages : 5
Published : 09/01/1976
Same As : ISO 1232:1976

History

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