Near-infrared imaging for quantitative analysis of active component in counterfeit dimethomorph using partial least squares regression
-
Yue Huang
,
Shun-Geng Min
Abstract
Near-infrared (NIR) imaging systems simultaneously record spectral and spatial information. Near-infrared imaging was applied to the identification of (E,Z)-4-(3-(4-chlorophenyl)-3-(3,4-dimethoxyphenyl)acryloyl)morpholine (dimethomorph) in both mixed samples and commercial formulation in this study. The distributions of technical dimethomorph and additive in the heterogeneous counterfeit product were obtained by the relationship imaging (RI) mode. Furthermore, a series of samples which consisted of different contents of uniformly distributed dimethomorph were prepared and three data cubes were generated for each content. The spectra extracted from these images were imported to establish the partial least squares model. The model’s evaluating indicators were: coefficient of determination (R 2) 99.42 %, root mean square error of calibration (RMSEC) 0.02612, root mean square error of cross-validation (RMSECV) 0.01693, RMSECVmean 0.03577, relative standard error of prediction (RSEP) 0.01999, and residual predictive deviation (RPD) 15.14. Relative error of prediction of the commercial formulation was 0.077, indicating the predicted value correlated with the real content. The chemical value reconstruction image of dimethomorph formulation products was calculated by a MATLAB program. NIR microscopy imaging here manifests its potential in identifying the active component in the counterfeit pesticide and quantifying the active component in its scanned image.
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© 2012 Institute of Chemistry, Slovak Academy of Sciences
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Articles in the same Issue
- Immobilization in biotechnology and biorecognition: from macro- to nanoscale systems
- Bond-graph description and simulation of membrane processes: Permeation in a compartmental membrane system
- Design simulations for a biogas purification process using aqueous amine solutions
- Experimental and numerical investigation of pressure drop coefficient and static pressure difference in a tangential inlet cyclone separator
- Trace elements in Variegated Bolete (Suillus variegatus) fungi
- N,N′-methylenedipyridinium Pt(II) and Pt(IV) hybrid salts: synthesis, crystal and molecular structures of [(C5H5N)2CH2] · [PtCl4] and [(C5H5N)2CH2] · [PtCl6]
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- One-step synthesis of solid sulfonic acid catalyst and its application in the acetalization of glycerol: crystal structure of cis-5-hydroxy-2-phenyl-1,3-dioxane trimer
- Mechanistic insights into the reaction of CF3CCl3 with SO3: Theory and experiment
- Near-infrared imaging for quantitative analysis of active component in counterfeit dimethomorph using partial least squares regression
- Corrosion of titanium diboride in molten FLiNaK(eut)
- Domino synthesis of novel series of 4-substituted 5-thioxo-1,2,4-triazolidin-3-one derivatives
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