Spectroscopy and Spectral Analysis, Volume. 30, Issue 11, 2962(2010)
Rapid Detection of Dichlorvos in Chlorpyrifos by Mid-Infrared and Near-Infrared Spectroscopy
In the present study, the content of dichlorvos in chlorpyrifos was rapidly determined by mid-infrared and near-infrared spectroscopy. The quantitative models were established by partial least squares (PLS) method and optimized. The independent validation sets and 7 test samples were used to evaluate the model accuracy. The results showed that mid-infrared and near-infrared spectroscopy can accurately determine the content of dichlorvos in chlorpyrifos. The RMSEC (the root mean square error of calibration) of the mid-infrared model and near-infrared model was 0.013 and 0.020, respectively. R2 (determination coefficient) both were 1.000. For 7 test samples, RMSEP before model recalibration is 0.22 (MIRS) and 0.09 (NIRS). The adaptability of the near-infrared model was much better and model updating was unnecessary. To sum up, MIR and NIR are both rapid and easy-operation method with simple pretreatment.
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GAO Xin, WANG Xin-yu, WANG Dong, HAO Xiang-hong, MIN Shun-geng. Rapid Detection of Dichlorvos in Chlorpyrifos by Mid-Infrared and Near-Infrared Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2010, 30(11): 2962
Received: Dec. 8, 2009
Accepted: --
Published Online: Jan. 26, 2011
The Author Email: Xin GAO (gxtommy@163.com)
CSTR:32186.14.