A method of testing the quality of milk using optical capillaries

Michał Borecki, Maciej Szmidt, Michał Korwin Pawłowski, Maria Bebłowska, Tomasz Niemiec, Paweł Wrzosek


The milk quality is determined by its visual appearance, absence of adulterating substances and ability to meet specific quality standards for somatic cell count (SCC), and bacteria count. There exist several diagnostic tests of milk quality. Some of them are applicable on dairy farms, like, for example, the California Mastitis Test (CMT) and the Milk Conductivity Test (MCT). Other tests, such as the bulk milk bacterial count, the bulk tank somatic cell count and tests for adulterants like water, sediments or antibiotics, are used in laboratories. The knowledge required to successfully apply the existing milk quality tests can be rather extensive and pertains both to the methodology and the diagnostic capabilities of a given test. Therefore, there is a need for new simple and low-cost methods of milk quality testing. This paper presents a new method of milk quality classification using low-cost optical capillaries. In this method, milk quality is determined by observation of milk behaviour under specific heating conditions using a simple low-cost photonic system with optical capillaries. We show that the optical capillary is a suitable tool for analysing liquids showing high scattering of light, such as milk.

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  1. El-Rashidy A.A., Fox L.K., Gay J.M.,"Diagnosis of Staphylococcus aureus intramammary infection by detection of specific antibody titer in milk", J. Dairy Sci., vol. 75, pp. 1430-1435, 1992. [CrossRef]
  2. Reinemann D.J., Mein G.A., Bray D.R., et al.,"Troubleshooting high bacteria counts in farm milk", Univ. Wisconsin Coop Ext Pub A3705, Madison WI, 1999.
  3. Karlsson A.O., Ipsen R., Ardo Y.,"Relationship between physical properties of casein micelles and rheology of skim milk concentrate", J. Dairy Sci. Vol. 80 pp. 3784-3797, 2005. [CrossRef]
  4. McMahon D.J., Brown R.J.," Composition, structure and integrity of casein micelles: a review", J. Dairy Sci, vol. 67, pp. 499-512, 1984. [CrossRef]
  5. Dress P., Belz M., Klein K.F., Grattan K.T.V., Franke H.,"Water-core-waveguide for pollution measurements in the deep ultra-violet", Applied Optics, vol. 37, pp. 4991-4997, 1998. [CrossRef]
  6. Romaniuk R., Dorosz J.,"Technology of soft-glass optical fiber capillaries", Proc. of SPIE, vol. 6347, pp. 634710, 2006. [CrossRef]
  7. Borecki M, Korwin Pawlowski M., Wrzosek P., Szmidt J.,"Capillaries as the components of photonic sensor micro-systems", J. of MS&T, vol. 19, pp. 065202, 2008.
  8. Borecki M.,"Intelligent Fiber Optic Sensor for Estimating the Concentration of a Mixture-Design and Working Principle", Sensors, vol. 7, pp. 384-399, 2007. [CrossRef]

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
Published in cooperation with SPIE

ISSN: 2080-2242