Fat and solids-not-fat estimation as affected by formalin treatment and storage of lactoperomidase-system activated milk

Authors
Citation
V. Sharma et D. Raj, Fat and solids-not-fat estimation as affected by formalin treatment and storage of lactoperomidase-system activated milk, J FD SCI M, 37(2), 2000, pp. 204-206
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Food Science/Nutrition
Journal title
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
ISSN journal
0022-1155 → ACNP
Volume
37
Issue
2
Year of publication
2000
Pages
204 - 206
Database
ISI
SICI code
0022-1155(200003/04)37:2<204:FASEAA>2.0.ZU;2-L
Abstract
Effect of formalin as sample preservative was studied on lactoperoxidase-hy drogen peroxide system-activated milk. Lactoperoxidase system (LP 25:15 and LP 70:30) was activated by adding 25 ppm and 70 ppm thiocyanate and 15 ppm and 30 ppm hydrogen peroxide in two different experiments. These samples w ere analysed for their fat and solids- not-fat content by different methods . The fat values obtained by Gerber method were found to be 6.35 +/- 0.17 a nd 5.92 +/- 0.36 for LP 25:15 and LP 70:30-activated milk samples, respecti vely. Fat contents by gravimetric method also showed no change and values o bserved were 6.36 +/- 0.17 and 5.89 +/- 0.25 for the respective samples. Af ter the addition of 0.4% formalin and storage up to 6 months, decreases in fat values were observed and values in 6 month stored samples observed were 5.68 +/- 0.12 and 5.30 +/- 0.20 for Gerber method fat and 5.90 +/- 0.15 an d 5.56 +/- 0.25 for gravimetric fat in the respective samples. Similarly. S NF values remained unaffected by giving LP treatment, whereas on formalin t reatment, they showe increases in gravimetric determination. The values obs erved were 9.89 +/- 0.12 in six months stored samples as compared to 9.48 /- 0.11 in formalin untreated LP 25:15 samples. Lactometric determination o f SNF showed decreases in fat values. which were 9.35 +/- 0.07 as compared to 9.52 +/- 0.12 in untreated samples, Similar trend was observed in LP 70: 30-activated samples which were preserved with formalin and stored.