ISO 1618:1976
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Aluminium oxide primarily used for the production of aluminium Determination of vanadium content N-Benzoyl-N-phenylhydroxylamine photometric method
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21-05-2019
English, French
01-09-1976
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The method is applicable to products having vanadium contents between 0,0003 % (m/m) and 0,016 % (m/m), provided that the content of chromic oxide and titanic oxide does not exceed 0,002 % (m/m) and 0,006 % (m/m), respectively. The principle consists in a previous oxidation of the vanadium contained in the test sample to vanadium(V) by patassium permanganate in sulphuric acid solution. Formation of the vanadium-N-benzoyl-N-phenylhydroxylamine complex. Extraction of the violet coloured complex with chloroform in hydrochloric acid*solution. Photometric measurement of the coloured complex at a wavelength of about 524 nm.
| DevelopmentNote |
Also numbered as BS 4140-12(1986) (07/2005)
|
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NBN T 03 412 : 1983 | Identical |
| BS 4140-16:1986 | Methods of test for aluminium oxide Determination of zinc content by flame atomic absorption |
| BS 4140-6:1980 | Methods of test for aluminium oxide Determination of titanium content |
| BS 4140-9:1986 | Methods of test for aluminium oxide Measurement of the angle of repose |
| BS 4140-4:1986 | Methods of test for aluminium oxide Preparation of sample solution by alkaline fusion |
| BS 4140-13:1986 | Methods of test for aluminium oxide Preparation of sample solution by treatment with hydrochloric acid under pressure |
| BS 4140-7:1986 | Methods of test for aluminium oxide Determination of iron content |
| BS 4140-22:1980 | Methods of test for aluminium oxide Determination of manganese content |
| BS 4140-5:1986 | Methods of test for aluminium oxide Determination of silica content |
| BS 4140-8:1986 | Methods of test for aluminium oxide Determination of absolute density using a pyknometer |
| BS 4140-1:1986 | Methods of test for aluminium oxide Preparation and storage of test samples |
| BS 4140-11:1986 | Methods of test for aluminium oxide Determination of sodium content |
| BS 4140-10:1986 | Methods of test for aluminium oxide Determination of untamped density |
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