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Updated: Apr 25, 2026

Fruit Volatile Analysis Using an Electronic Nose
Published on: March 30, 2012
An improved approach to identify irradiated spices using electronic nose, FTIR, and EPR spectroscopy
Bhaskar Sanyal1, Jae-Jun Ahn, Jeong-Hwan Maeng
1School of Food Science & Biotechnology, Kyungpook Natl. Univ, Daegu, 702-701, Korea; Food Technology Div, Bhabha Atomic Research Center, Trombay, Mumbai, 400 085, India.
Abstract:
Changes in cumin and chili powder from India resulting from electron-beam irradiation were investigated using 3 analytical methods: electronic nose (E-nose), Fourier transform infrared (FTIR) spectroscopy, and electron paramagnetic resonance (EPR) spectroscopy. The spices had been exposed to 6 to 14 kGy doses recommended for microbial decontamination. E-nose measured a clear difference in flavor patterns of the irradiated spices in comparison with the nonirradiated samples. Principal component analysis further showed a dose-dependent variation. FTIR spectra of the samples showed strong absorption bands at 3425, 3007 to 2854, and 1746 cm(-1). However, both nonirradiated and irradiated spice samples had comparable patterns without any noteworthy changes in functional groups. EPR spectroscopy of the irradiated samples showed a radiation-specific triplet signal at g = 2.006 with a hyper-fine coupling constant of 3 mT confirming the results obtained with the E-nose technique. Thus, E-nose was found to be a potential tool to identify irradiated spices.
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