ISO 5549:1978
Withdrawn
View Superseded by
Caseins and caseinates — Determination of protein content (Reference method)
Hardcopy , PDF
English, French
06-01-1978
04-09-2025
Does not apply to caseins and caseinates containing ammonium caseinate or other ammonium compounds, or other nitrogenous nonprotein compounds. The principle of determination consists in digesting a test portion with a mixture of potassium sulphate and sulphuric acid, in the presence of copper(II) sulphate as catalyst, to convert organic nitrogen into ammoniacal nitrogen, distilling and absorbing the ammonia in boric acid solution, titrating with standard volumetric hydrochloric acid solution and multiplying the resualt by the factor 6.38.
| Committee |
ISO/TC 34/SC 5
|
| DevelopmentNote |
Also numbered as BS 6248-7(1982) (09/2005)
|
| DocumentType |
Standard
|
| Pages |
3
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy |
| Standards | Relationship |
| NFV 04 387 : 1985 | Identical |
| BIS IS 11917 : 1987(R2003) | Identical |
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