1. Non-destructive detection of pesticide residues in cucumber using visible/near-infrared spectroscopy.
- Author
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Jamshidi, Bahareh, Mohajerani, Ezeddin, Jamshidi, Jamshid, Minaei, Saeid, and Sharifi, Ahmad
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PESTICIDE residues in food , *DIAZINON , *LEAST squares , *CALIBRATION , *CUCUMBERS , *NEAR infrared spectroscopy ,UNITED States. Dietary Supplement Health & Education Act of 1994 - Abstract
The feasibility of using visible/near-infrared (Vis/NIR) spectroscopy was assessed for non-destructive detection of diazinon residues in intact cucumbers. Vis/NIR spectra of diazinon solution and cucumber samples without and with different concentrations of diazinon residue were analysed at the range of 450–1000 nm. Partial least squares-discriminant analysis (PLS-DA) models were developed based on different spectral pre-processing techniques to classify cucumbers with contents of diazinon below and above the MRL as safe and unsafe samples, respectively. The best model was obtained using a first-derivative method with the lowest standard error of cross-validation (SECV = 0.366). Moreover, total percentages of correctly classified samples in calibration and prediction sets were 97.5% and 92.31%, respectively. It was concluded that Vis/NIR spectroscopy could be an appropriate, fast and non-destructive technology for safety control of intact cucumbers by the absence/presence of diazinon residues. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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