Application of a microbial sensor for determination of short-chain fatty acids in raw milk samples. |
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| Authors: | H Ukeda G Wagner G Weis M Miller H Klostermeyer R D Schmid |
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| Affiliation: | GBF-Gesellschaft für Biotechnische Forschung, Department of Enzymtechnology, Braunschweig, Federal Republic of Germany. |
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| Abstract: | A microbial sensor system, based on the use of immobilized Arthrobacter nicotiana and an oxygen electrode, was applied to determine free short-chain fatty acids in raw milk samples and the result was compared with gas chromatography (GC) and a titrimetric method. The sensor response was linearly related to the concentration of short-chain fatty acids obtained by GC (n = 10, r = 0.92) and to the total concentration of free fatty acids obtained by titrimetric measurement (n = 10, r = 0.78). This result suggests that the present microbial sensor can selectively determine free short-chain fatty acids in raw milk samples and may be useful as a very fast detection method of rancidity in milk. |
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