Fenthion Determination by FT-Raman Spectroscopy

  • Raman bands observed at 2951, 1065, 661, 604 and 568 cm-1 are used for calibration.
  • Calibration curves based on Raman intensity and band area measurement are linear (correlation coefficients: 0.991-0.998) in the concentration range of 0.4-4.36 M. Detection limits ranged between 0.14 to 0.36 M and precision from 0.4 to 6.8 % RSD (n=4).
  • Spectra normalization against the 802 cm-1 cyclohexane band proved to be effective in minimizing the effect of excitation intensity fluctuations and sample positioning changes in calibration data, resulting in improved long term stability of calibration curves.
  • Results obtained during the analysis of the Lebaycid formulation compare well with those obtained by the GC reference method.
  • The proposed FT-Raman method has the advantage of being fast, simple, safe, avoids sample pre-treatment and minimises handling of toxic samples.

Questions and comments to author: Dr C.A. Georgiou, cag@aua.gr
Phone: +3010-5294248, fax: +3010-5294265
Chemistry Laboratory, Agricultural University of Athens, Greece