Real-time assessment of food freshness in refrigerators based on a miniaturized electronic nose

Food freshness has been paid great attention due to its direct relationship with human health and safety, and approaches for food freshness evaluation have attracted much interest from researchers. In this paper, we developed a miniaturized electronic nose system for convenient, direct and real-time food freshness evaluation by analyzing gases in a refrigerator (4 °C). The proposed system consists of a gas sampling module and MOS gas sensor array. The gas sampling module was used to extract gases from the refrigerator and clean the gas path by controlling a pump and a three-way valve. The gas sensor array is composed of three MOS sensors to monitor odor changes in the refrigerator. Meanwhile, a food freshness assessment model was established based on the sensor array results and a comparison with human sensory evaluation results. In order to confirm the effectiveness of the system, we performed experiments on meat, vegetables and fruits with three freshness levels including fresh, semi-fresh and spoiled. The accuracy of the system to identify the three freshness levels is 84.8%, 68.0% and 96.2% respectively. The experimental results demonstrated that the developed electronic nose can effectively evaluate the food freshness level. Therefore, the proposed electronic nose provides a non-destructive, low cost and convenient platform for fast and real-time evaluation of food freshness in refrigerators.

[1]  S. Fanali,et al.  Capillary electrochromatography in food analysis , 2016 .

[2]  Yong Fang,et al.  Effect of hot air drying on volatile compounds of Flammulina velutipes detected by HS-SPME-GC-MS and electronic nose. , 2016, Food chemistry.

[3]  Kaiqi Su,et al.  Recent achievements in electronic tongue and bioelectronic tongue as taste sensors , 2015 .

[4]  Alphus D. Wilson,et al.  Electronic-Nose Applications for Fruit Identification, Ripeness and Quality Grading , 2015, Sensors.

[5]  James S Cullor,et al.  Microbiological analysis of raw milk in Rwanda , 2015 .

[6]  Ganesh Kumar Mani,et al.  Electronic noses for food quality : a review , 2015 .

[7]  Joo-Woong Kim,et al.  The Meat Freshness Monitoring System Using the Smart RFID Tag , 2014, Int. J. Distributed Sens. Networks.

[8]  Jiewen Zhao,et al.  Nondestructive measurement of total volatile basic nitrogen (TVB-N) in pork meat by integrating near infrared spectroscopy, computer vision and electronic nose techniques. , 2014, Food chemistry.

[9]  Mahmoud Omid,et al.  Freshness assessment of gilthead sea bream (Sparus aurata) by machine vision based on gill and eye color changes , 2013 .

[10]  Jun Tao,et al.  Advances in Fruit Aroma Volatile Research , 2013, Molecules.

[11]  Jens Michael Carstensen,et al.  Using Multispectral Imaging for Spoilage Detection of Pork Meat , 2013, Food and Bioprocess Technology.

[12]  Hyung Seok Kim,et al.  Meat and Fish Freshness Inspection System Based on Odor Sensing , 2012, Sensors.

[13]  Qiang Cai,et al.  Rapid Classification of Hairtail Fish and Pork Freshness Using an Electronic Nose Based on the PCA Method , 2011, Sensors.

[14]  Diane M. Barrett,et al.  Color, Flavor, Texture, and Nutritional Quality of Fresh-Cut Fruits and Vegetables: Desirable Levels, Instrumental and Sensory Measurement, and the Effects of Processing , 2010, Critical reviews in food science and nutrition.

[15]  Marta Albisu,et al.  Food quality certification: An approach for the development of accredited sensory evaluation methods , 2007 .

[16]  Susana Fiszman,et al.  Changes in colour and texture and their relationship with eating quality during storage of two different dessert bananas , 2007 .

[17]  T. Loughin,et al.  Consumer sensory analysis of organically and conventionally grown vegetables. , 2007, Journal of food science.

[18]  Hye-Young Seo,et al.  A Comparative Study of the Changes in Volatile Flavor Compounds from Dried Leeks (Allium tuberoum R.) following γ-Irradiation , 2006 .

[19]  Yunfei Li,et al.  Interactions of microorganisms during natural spoilage of pork at 5 °C , 2006 .

[20]  L. Skibsted,et al.  Storage stabilities of pork scratchings, peanuts, oatmeal and muesli: Comparison of ESR spectroscopy, headspace-GC and sensory evaluation for detection of oxidation in dry foods , 2005 .

[21]  E. Guichard,et al.  Determination of key odorant compounds in freshly distilled cognac using GC-O, GC-MS, and sensory evaluation. , 2004, Journal of agricultural and food chemistry.

[22]  Lone Gram,et al.  Food spoilage--interactions between food spoilage bacteria. , 2002, International journal of food microbiology.

[23]  José Miguel Aguilera,et al.  Description of food surfaces and microstructural changes using fractal image texture analysis , 2002 .

[24]  J. Aked,et al.  Discrimination amongst Alliums using an electronic nose , 2001 .

[25]  J. Pawliszyn,et al.  Applications of solid-phase microextraction in food analysis. , 2000, Journal of chromatography. A.

[26]  Herbert Stone,et al.  Sensory Evaluation Practices , 1985 .