Abstract
This paper will describe the new nondestructive measurement of pesticide residues in the agricultural products. This method proposed uses Fourier transform infrared spectroscopy of attenuated total reflectance method (FT-IR-ATR). This method processes the spectrum by the canonical analysis and or quadratic discriminant analysis. It takes about fifteen minutes to measure the pesticide residues in the agricultural products. The measuring time is the shortest among the conventional destructive methods, of which measuring time are some hours. This method was applied to some kinds of vegetables that were practically produced in the real fields. The discrimination rules were verified using the Gaschromatograph values as the references.
The main results of this study are as follows.
(1) The discrimination rules are proved to be stable in the case of lettuces as the test set. The correctness of discrimination is around 80%, that is as much as one in the case of the training set.
(2) The discrimination rules are expected to be applicable to the other kinds of vegetables; celeries and chinese cabbages, while they are not applicable to cabbages, because of its surface properties.
(3) The safety inspection system of the agricultural products using the FT-IR-ATR are expected to be more effective and lower cost than the conventional methods.
