• Title, Summary, Keyword: electronic nose

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Application of Electronic Nose for Quality Control of The High Quality and Functional Components (고품질 기능성 물질의 품질관리를 위한 전자코 응용)

  • Noh Bong-Soo
    • Proceedings of the Korean Society of Crop Science Conference
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    • pp.40-54
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    • 2006
  • It's not easy to detect the high quality and functional compounds for control quality of food materials. The electronic nose was an instrument, which comprised of an array of electronic chemical sensors with partial specificity and an appropriate pattern recognition system, capable of recognizing simple or complex odors. It can conduct fast analysis and provide simple and straightforward results and is best suited for quality control and process monitoring in the field of functional foods. Numbers of applications of an electronic nose in the functional food industry include discrimination of habitats for medicinal food materials, monitoring storage process, lipid oxidation, and quality control of food and/or processing with principal component analysis, neural network analysis and the electronic nose based on GC-SAW sensor. The electronic nose would be possibly useful for a wide variety of quality control in the functional food and plant cultivation when correlating traditional analytical instrumental data with sensory evaluation results or electronic nose data.

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Development of an Electronic Nose System for Evaluation of Freshness of Pork (돈육의 신선도 평가를 위한 전자코 시스템 개발)

  • Lee, Hoon-Soo;Cho, Byoung-Kwan;Chung, Chang-Ho;Lee, Ki-Teak;Jo, Cheo-Run
    • Journal of Biosystems Engineering
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    • v.34 no.6
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    • pp.462-469
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    • 2009
  • The aim of this study was to develop a portable electronic nose system for freshness measurement of stored pork. An electronic nose system was constructed using seven different MOS sensor array. To determine the quality change of pork with storage time, the samples were divided into ten groups in terms of storage time with an increment of 2 day up to 19 storage days. GC-MS, total bacteria's count (TBC), thiobarbituric acid reactive substance (TBARS), and pH analyses as well as the analysis of the electronic nose system measurement were performed to monitor the freshness change of the samples. To investigate the performance of the electronic nose system for detecting the change of freshness of pork, the acquired signal values of the system were compared with those of GC-MS, TBC, TBARS, and pH analysis values. According to principal component analysis (PCA) and linear discriminant analysis (LDA) with the signals of the electronic nose system for the pork samples, the sample groups were clearly separated into two groups of 1-9 days and 11-19 days, and four groups of 1-3 days, 5-9 days, 11 days, and 13-19 days respectively. The results show that the electronic nose system has potential for evaluating freshness of pork.

Analysis of Volatile Compounds using Electronic Nose and its Application in Food Industry (전자코를 이용한 휘발성분의 분석과 식품에의 이용)

  • Noh, Bong-Soo
    • Korean Journal of Food Science and Technology
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    • v.37 no.6
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    • pp.1048-1064
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    • 2005
  • Detection of specific compounds influencing food flavor quality is not easy. Electronic nose, comprised of electronic chemical sensors with partial specificity and appropriate pattern recognition system, is capable of recognizing simple and complex volatiles. It provides fast analysis with simple and straightforward results and is best suited for quality control and process monitoring of flavor in food industry. This review examines application of electronic nose in food analysis with brief explanation of its principle. Characteristics of different sensors and sensor drift. and solutions to related problems are reviewed. Applications of electronic nose in food industry include monitoring of fermentation process and lipid oxidation, prediction of shelf life, identification of irradiated volatile compounds, discrimination of food material origin, and quality control of food and processing by principal component analysis and neural network analysis. Electronic nose could be useful for quality control in food industry when correlating analytical instrumental data with sensory evaluation results.

Diagnosis of Osmidrosis Axillae Using Electronic Nose (전자코를 이용한 액취증의 진단)

  • Kim, Jeong-Do;Jang, Seong-Jin;Lim, Seung-Ju;Park, Sung-Dae;Kim, Dong-Jin;Kim, Jung-Ju
    • Journal of Sensor Science and Technology
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    • v.22 no.4
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    • pp.276-280
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    • 2013
  • The purpose of this paper is to diagnose osmidrosis visually and quantify the extent of osmidrosis. To achieve this, we designed the diagnosis method of osmidrosis using electronic nose system. The developed electronic nose system use principal component analysis for visualization of osmidrosis and fuzzy c-means algorithm for quantification. To confirm the efficiency of electronic nose system for osmidrosis diagnosis, we obtained samples from 34 volunteers and compared our experiment results with the doctor's diagnosis, and we met with successful results.

Implementation of a Portable Electronic Nose System for Field Screening (필드 스크린을 위한 휴대용 전자코 시스템의 구현)

  • Byun, Hyung-Gi;Lee, Jun-Sub;Kim, Jeong-Do
    • Journal of Sensor Science and Technology
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    • v.13 no.1
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    • pp.41-46
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    • 2004
  • There is currently much interest in the development of instruments that emulate the senses of humans. Increasingly, there is demand for mimicking the human sense of smell, which is a sophisticated chemosensory system. An electronic nose system is applicable to a large area of industries including environmental monitoring. We have designed a protable electronic nose system using an array of commercial chemical gas sensors for recognizing and analyzing the various odours. In this paper, we have implemented a portable electronic nose system using an array of gas sensors for recognizing and analyzing VOCs (Volatile Organic Compounds) in the field. The accuracy of a portable electronic nose system may be lower than an instrument such as GC/MS (Gas Chromatography/Mass Spectrometer). However, a portable electronic nose system could be used on the field and showed fast response to pollutants in the field. Several different algorithms for odours recognition were used such as BP (Back-Propagation) or LM-BP (Levenberq-Marquardt Back-Propagation). We applied RBF (Radial Basis Function) Network for recognition and quantifying of odours, which has simpler and faster compared to the previously used algorithms such as BP and LM-BP.

Application of Electronic Nose in Biotechnology (바이테크놀로지 분야에서의 전자코 이용)

  • Lim, Chae-Lan;Noh, Bong-Soo
    • KSBB Journal
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    • v.22 no.6
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    • pp.401-408
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    • 2007
  • It's not easy to detect the specific compounds from various compounds that fermented in bioreactor. The electronic nose was an instrument, which comprised of an array of electronic chemical sensors with partial specificity and an appropriate pattern recognition system, capable of recognizing simple or complex volatiles. It can conduct fast analysis and provide simple and straightforward results and is best suited for quality control and process monitoring in field of biotechnology. This review examined the application of electronic nose in biotechnology and brief explanation of its principle. In this minireview numbers of applications of an electronic nose in biotechnology include monitoring fermentation process, to overcome interference with alcohol, and to detect contaminant microorganism were discussed. The electronic nose would be useful for a wide variety of biotechnology when correlating analytical instrumental data with the obtained data from electronic nose.

Intelligent Electronic Nose System for Detection of VOCs in Exhaled Breath

  • Byun, Hyung-Gi;Yu, Joon-Bu
    • Journal of Sensor Science and Technology
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    • v.28 no.1
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    • pp.7-12
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    • 2019
  • Significant progress has been made recently in detection of highly sensitive volatile organic compounds (VOCs) using chemical sensors. Combined with the progress in design of micro sensors array and electronic nose systems, these advances enable new applications for detection of extremely low concentrations of breath-related VOCs. State of the art detection technology in turn enables commercial sensor systems for health care applications, with high detection sensitivity and small size, weight and power consumption characteristics. We have been developing an intelligent electronic nose system for detection of VOCs for healthcare breath analysis applications. This paper reviews our contribution to monitoring of respiratory diseases and to diabetic monitoring using an intelligent electronic nose system for detection of low concentration VOCs using breath analysis techniques.

Analysis of Biomarkers Using Optical Electronic-Nose (광학식 전자코에 의한 생체표지자 분석)

  • Yi, Seung-Hwan;Kim, Jung-Sik;Yi, Su-Uk
    • Journal of Sensor Science and Technology
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    • v.28 no.3
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    • pp.171-176
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    • 2019
  • The biomarkers related to the colorectal cancers and diseases were surveyed and summarized, and an optical electronic nose was researched and developed for their analysis. The prototyped sensor revealed that it could discriminate two gases: ethanol 2000 ppm and $CO_2$ 500 ppm. Furthermore, the sensor demonstrated the potential capability of estimation of $CO_2$ concentration with 95% confidence level. Based on the above experimental results, the developed optical electronic nose was tested with the mixtures of gases (Isopropyl Alcohol, Acetone, Methanol, and Toluene) and the biomarkers were successfully segregated using principal component analysis.

The Study of Identification for Blended Sesame Oil by Metal Oxide type Electronic Nose

  • Shin, Jung-Ah;Lee, Ki-Teak
    • Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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    • pp.105.1-105
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    • 2003
  • This study was performed to develop the precise and rapid method to distinguish the blended sesame oil through the electronic nose analysis. The sesame oil was blended with corn oil at the ratio of 95:5, 90:10, 80:20(w/w), respectively. Samples were then analyzed by gas chromatography, SPME-GC/MS and the electronic nose composed of 12 metal oxide sensors. The sensetivities(delta Rgas/Rair) of sensors by electronic nose was carried out with principal component analysis(PCA). The proportion of first principal component showed 98.76%. In this study, the electronic nose analysis could be used as a competent method to classify for genuine sesame oil.

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