Fourier transform near-infrared spectroscopy for nondestructive and rapid measurement of moisture content of paddy
2014
Pandiselvam, Ravi (Tamil Nadu Agricultural University, Coimbatore (India). Department of Food and Agricultural Process Engineering) | Thirupathi, Venkatachalam (Tamil Nadu Agricultural University, Coimbatore (India). Department of Food and Agricultural Process Engineering) | Palanisamy, Vennila (Post Harvest Technology Centre, Coimbatore (India))
The accurate measurement of moisture content of paddy is essential for the effective supervision of its quality. The feasibility of measuring moisture content in paddy was investigated by Fourier Transform Near-Infrared (FT-NIR) spectroscopic technique. A calibration model was developed using paddy standards of varying moisture content in the near-infrared region (4000-12000 cm-1). The developed model was validated. FT-NIR spectroscopy with chemometrics, using the PLS-first derivative plus vector normalization method could predict the moisture content in paddy samples accurately up to an correlation coefficient (R2) value greater than 0.97, RPD (residual predictive deviation) greater than 6 and root mean square error of cross validation (RMSECV) value less than 0.5 with 5 factors in the prediction model. The developed model was applied to predict moisture content in paddy samples within 10-12 seconds. The developed procedure was further validated by recovery studies by comparing with oven method and indirect method (digital moisture meter) of moisture determination.
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