ISO 5549:1978 PDF
Caseins and caseinates — Determination of protein content (Reference method)
Title (English):
ISO 5549:1978
Caseins and caseinates — Determination of protein content (Reference method)
- Document status:
- Withdrawn
- Format:
- Electronic (PDF)
- Number of pages:
- 3
- Publication date:
- June 1, 1978
- Edition:
- ISO IS 5549 edition 1 version 1
- ICS:
- 67.100.99
Description (English):
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.
Technical details
- Technical committee
- ISO/TC 34/SC 5 - Milk and milk products
- SKU
- ISO 5549:1978
