Die quantitative Bestimmung des Proteingehaltes der Milch mittels Ultraviolettspektralphotometrie 7. Mitt. Das Milchanalysengerät MAG 100 (Carl Zeiss Jena GmbH) — eine Möglichkeit zur simultanen Analyse des Protein-und des Fettgehaltes von Rohmilch im Erzeugerbetrieb
✍ Scribed by Reichardt, W. ;Krauss, M. ;Gernand, U. ;Klauke, G. ;Grau, W.
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 596 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0027-769X
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✦ Synopsis
The quantitative estimation of the protein content in milk by means of ultraviolet spectral photometry. Part 7. The milk analyzer MAG 100 (Carl Zeiss Jena GmbH) as possibility for simultaneous measuring of the protein and fat content in raw milk on the dairy farm.
A new analysing apparatus is introduced, which allows to measure protein and fat contents of milk in the dairy farm. The instrument works on the basis of ultraviolet spectral photometry. Before measuring the milk sample must be diluted with a hydrous detergent solution in the ratio 1 : 100 and then homogenized. Accuracy and precision of the analytic results are influenced by detergent type, the water quality of detergent solution, the detergent foam, the air content and the pH of detergent solution, the reliability of homogenizer and thermostating system, the stability of photometer and by the error of dosage. Also a milk standard was developed, which is required for daily calibration of the apparatus.
Einleitung und Aufgabenstellung
Fur die gleichzeitige photometrische Analyse des Protein-und Fettgehaltes von Milch war bis 1970 nur die von GOULDEN [ 1,2] begrundete InfrarotmeBtechnik bekannt. Versuche, fur die gemeinsame Bestimmung beider Milchinhaltsstoffe den sichtbaren (VIS) und