Photoacoustic analysis of some milk products in ultraviolet and visible light.

R. Martel, C. N. N'Soukpoé-Kossi, P. Paquin, Roger Leblanc

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The research reported here demonstrates the possibility of using photoacoustic spectroscopy for milk product analysis. Milk products including yogurt, cheese, and market milk were analyzed in the ultraviolet visible range. A strong absorption peak was present at 280 nm for all the products. Relationship was linear between relative protein concentration of skim milk and the photoacoustic signal at 280 nm (r2 greater than .99). Powdered milks, prepared from skim milk that had been subjected to different heat treatments before drying, were analyzed, and a second absorption peak at 335 nm was noted for milks subjected to high heat treatment prior to the drying process. This second absorption peak appears associated with Maillard reaction products. Analysis of stored UHT heat-treated milk and infant formulas showed a similar peak at 335 nm. The results suggest that the Maillard reaction is initiated during UHT treatment of milk, and associated pigments develop only during storage. The presence of the 335-nm band in the photoacoustic spectra of infant formulas is considered as the result of heat sterilization. It is anticipated that as photoacoustic spectroscopy becomes more common, its usefulness in the milk industry, in particular, and in food science, in general, will increase.

Original languageEnglish
Pages (from-to)1822-1827
Number of pages6
JournalJournal of Dairy Science
Volume70
Issue number9
StatePublished - Sep 1 1987
Externally publishedYes

Fingerprint

Ultraviolet Rays
photoacoustic spectroscopy
dairy products
ultraviolet radiation
Milk
infant formulas
skim milk
Light
milk
UHT treatment
milk industry
drying
heat treatment
heat
fluid milk
cheese milk
Maillard reaction products
dried milk
Maillard reaction
yogurt

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Food Science
  • veterinary(all)

Cite this

Photoacoustic analysis of some milk products in ultraviolet and visible light. / Martel, R.; N'Soukpoé-Kossi, C. N.; Paquin, P.; Leblanc, Roger.

In: Journal of Dairy Science, Vol. 70, No. 9, 01.09.1987, p. 1822-1827.

Research output: Contribution to journalArticle

Martel, R, N'Soukpoé-Kossi, CN, Paquin, P & Leblanc, R 1987, 'Photoacoustic analysis of some milk products in ultraviolet and visible light.', Journal of Dairy Science, vol. 70, no. 9, pp. 1822-1827.
Martel, R. ; N'Soukpoé-Kossi, C. N. ; Paquin, P. ; Leblanc, Roger. / Photoacoustic analysis of some milk products in ultraviolet and visible light. In: Journal of Dairy Science. 1987 ; Vol. 70, No. 9. pp. 1822-1827.
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