[Rapid detection of dichlorvos in chlorpyrifos by mid-infrared and near-infrared spectroscopy].
Guang Pu Xue Yu Guang Pu Fen Xi
; 30(11): 2962-6, 2010 Nov.
Article
em Zh
| MEDLINE
| ID: mdl-21284163
ABSTRACT
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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Base de dados:
MEDLINE
Tipo de estudo:
Diagnostic_studies
Idioma:
Zh
Revista:
Guang Pu Xue Yu Guang Pu Fen Xi
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
China