Measurement of pesticide residues in food based on diffuse reflectance IR spectroscopy

This paper describes nondestructive pesticide measurement of agricultural products based on the diffuse reflectance infrared spectroscopy (FT-IR-DR). Both FT-IR-DR spectra and the concentration of the pesticide residues were measured for real lettuce samples. Then, calibration models to estimate the residual concentration of the pesticides were derived by partial least square regression of the spectra. Cross validations of the calibration models were also carried out. It has been revealed that by using this method, it takes two minutes to measure multi-elements of pesticide residues in a sample lettuce head. A sensor system for food safety inspection could be expected based on this method