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Comparative Analysis on Sensory Evaluation and Instrumental Simulative Appraisal for Hainan Broken Black Tea

Author: LiDaMin
Tutor: LiuZuo
School: Chinese Academy of Agricultural Sciences
Course: Gardening
Keywords: Hainan Broken black Sensory evaluation Electronic Nose Electronic Tongue
CLC: TS272
Type: Master's thesis
Year: 2010
Downloads: 77
Quote: 0
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Abstract


Tea sensory evaluation based on human sensory organs, a quick, easy and more accurate assessment of tea tea assessment procedures to determine the merits of tea quality. However, the sensitivity of the human sense organs susceptible to the interference of external factors affecting the fairness and accuracy of the tea assessed. In recent years, the application of sensor array and the olfactory fingerprint analyzer and taste fingerprint analyzer detection function integrated digital signal processing method based on pattern recognition, enhanced the joint detection discerning tea aroma and taste. Therefore, the use of electronic technology to simulate expert's visual, taste, smell sensory function, auxiliary evaluate the quality of tea is a major trend. This topic using electronic nose and electronic tongue detect Hainan broken black, and compared with the traditional sensory evaluation study, to draw the following conclusions: 1. Electronic nose technology can distinguish between different broken black aroma of tea aroma has a low content of complex composition, volatile, unstable, and other characteristics, the electronic nose technique utilizes a different sensor array detector is based on a physical change produced by the sample with the sensor and for data processing, and its sensitivity and selectivity up to ppm-ppb value. Test the results of the electronic nose technology to be able to distinguish between different broken black tea aroma. 2. Electronic tongue better able to distinguish the taste of different broken black electronic tongue technology applications taste sensor array and pattern recognition methods of digital signal processing, analog and biological concepts tongue, the by instrument \objective analysis. The results show that the electronic tongue can distinguish between different broken black tea taste. Electronic nose and electronic tongue tea pending further in-depth study of the electronic nose and electronic tongue technology advantages: sample pre-treatment is simple, fast analysis, the result is simple and reliable, etc.. Some similar components or similar samples, the electronic nose and electronic tongue analysis has incomparable advantages over other traditional instruments can even detect human sensory evaluation. But at the same time the new technology, there are some problems, such as the sensitivity and selectivity of the sensor, the appropriate data analysis methods, how to build a complete detection database solutions to these problems will detect more and more accurate and correct senses of tea evaluation of the quality of tea, so to be further in-depth study of the electronic nose and electronic tongue Tea.

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CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > Beverage cold manufacturing industry > Tea
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