ISO 5375:1979
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Condensed phosphates for industrial use (including foodstuffs) — Determination of oxides of nitrogen content — 3,4- Xylenol spectrophotometric method
Hardcopy , PDF
English, French
01-02-1979
26-02-2019
Applicable to products having contents, expressed in nitrogen, of 2 mg/kg or more. Oxidation of nitrogen(III) of a test portion to nitrogen(V) by potassium permanganate. Reaction of nitrogen(V) with 3,4-xylenol under specified conditions to form a nitrate derivative. Distillation of the nitrate derivative and absorption in a sodium hydroxide solution. Spectrophotometric measurement of the yellow coloured nitrophenol at a wavelength of about 435 nm. Has also been approved by the IUPAC.
| Committee |
ISO/TC 47
|
| DevelopmentNote |
Also numbered as BS 4427-15(1982) (08/2005)
|
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| SAC GB/T 9984.10 : 2004 | Identical |
| NFT 20 499 : 79 FD | Identical |
| NBN T 03 313 : 1980 | Identical |
| UNE 55559:1983 | Identical |
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