期刊
JOURNAL OF FOOD SCIENCE
卷 84, 期 1, 页码 51-58出版社
WILEY
DOI: 10.1111/1750-3841.14400
关键词
electronic nose; Fourier transform infrared spectroscopy; gas chromatography-mass spectrometry; metal-oxide semiconductor sensors; volatile organic compounds
资金
- European Union [WND-POIG.01.03.01-06-030/09]
- Polish Republic
- Natl. Centre for Research and Development (NCBR) [PBS2/A8/22/2013]
The paper presents application of a new three-parameter method for identification of volatile organic compounds (VOCs) and creation of fingerprints based on the impregnation time (t(IM)), cleaning time (t(CL)), and maximum response ([Delta R/R](max)) of chemically sensing sensors for detecting spoilage of agricultural commodities. The novelty of this method consists in the use of two additional parameters: an impregnation time and a cleaning time for the first time. An Agrinose built of eight metal oxide semiconductors was used for identification of loss in the rapeseed quality during a short period of storage after harvest. Principal component analysis was applied as a method of data analysis to verify the suitability of the new three-parameter method and visualization of groups of different quality of raw materials. Fourier transform infrared spectroscopy spectra for identification of the infrared bands of fungal polysaccharides and gas chromatography-mass spectrometry analysis of the headspace was applied to describe volatile metabolite contents in reference to the electronic nose technique. The investigations and analyses have demonstrated that the new three-parameter method for determination of volatile compounds ([Delta R/R](max), t(IM), t(CL)) describes the changes in VOCs more efficiently than the single-parameter approach based only on the maximum sensor response ([Delta R/R](max)). The proposed method for generation of electronic fingerprints clearly discriminated between rapeseed samples infected with field and storage microflora. Three-parameters method can be useful for quality control in food microbiology and safety, as a rapid method of analysis and detection, including electronic nose sensor technology.
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