Abstract
Chitosan based milk powder quality degradation sensors have been successfully fabricated by combining electrochemical deposition and photolithography techniques. The aim of this paper is to discuss the potential of chitosan thin film sensors for detecting milk powder quality degradation. The milk powder quality may be decreased upon storage. Milk powder surface composition changes during storage due to increasing in moisture content. Electrical testing of chitosan thin film properties to fresh milk powder and milk powder exposed to air for 1, 2, 3 and 4 weeks has been done at room temperature. The results show that the chitosan-based milk powder quality degradation sensors have good performance demonstrated by very good response, stability, recovery, repeatability and selectivity. The simple, easy and inexpensive technique is required to monitor the milk powder quality degradation.
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