ISO 731-3:1977
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Formic acid for industrial use Methods of test Part 3: Determination of content of other acids Potentiometric method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
28-02-2019
English, French
01-02-1977
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The principle consists in a quantitative oxidation of the formic acid in a test portion with excess mercury(II) oxide. Potentiometric titration of the residual acids with standard volumetric sodium hydroxide solution. The method is applicable to products containing 0,5 to 6,0 % (m/m) of other acids, expressed as acetic acid. ISO/R 731 has been subdivised into seven parts. ISO 731/3 replaces clause 4 of ISO Recommendation R 731-1968.
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
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| Standards | Relationship |
| NFT 20 680 : 83 FD | Identical |
| NBN T 04 003 : 1983 | Identical |
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