ABSTRACT
Raman and fluorescence spectra from several agrochemicals were measured, which are sold for the use in vegetables, fruits and grains. Characteristic vibration Raman peaks from some of the agrochemicals were recorded, hence the spectra can be used for their identification. Other marketed agrochemicals demonstrated strong fluorescence under 514.5 nm excitation. It was found that the fluorescence spectra of the agrochemicals are very different. According to these results one can detect the trace amount of agrochemicals left on the surface of fruits, vegetables and grains in situ and conveniently.
Subject(s)
Agrochemicals/chemistry , Fluorescence , Spectrometry, Fluorescence/methods , Spectrum Analysis, Raman/methods , Materials Testing , Particle Size , Spectrum Analysis , Tooth Bleaching/trendsABSTRACT
The Raman spectra of three kinds of penicillins were obtained and investigated by micro Raman technique. By comparing these Raman spectra, we find there are many differences among them, and it can be used as an important criterion in distinguishing different kinds of penicillins. In this paper, the characteristic Raman peaks of penicillins have been given. In other hand, we find there is no much difference in the Raman spectra of same kind of penicillin, even though different plants produce them. So, the Raman spectra can't be used to make sure whether certain plant produces one sample.