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   Quality Degradation of Chinese White Lotus Seeds Caused by Dampening during Processing and Storage: Rapid and Nondestructive Discrimination Using Near-Infrared Spectroscopy  
   
نویسنده xu l. ,fu h.-y. ,cai c.-b. ,she y.-b.
منبع journal of analytical methods in chemistry - 2015 - دوره : 2015 - شماره : 0
چکیده    Dampening during processing or storage can largely influence the quality of white lotus seeds (wls). this paper investigated the feasibility of using near-infrared (nir) spectroscopy and chemometrics for rapid and nondestructive discrimination of the dampened wls. regular (n = 167) and dampened (n = 118) wls objects were collected from five main producing areas and nir reflectance spectra (4000-12000 cm-1) were measured for bare kernels. the influence of spectral preprocessing methods,including smoothing,taking second-order derivatives (d2),and standard normal variate (snv),on partial least squares discrimination analysis (plsda) was compared to select the optimal data preprocessing method. a moving-window strategy was combined with plsda (mwplsda) to select the most informative wavelength intervals for classification. based on the selected spectral ranges,the sensitivity,specificity,and accuracy were 0.927,0.950,and 0.937 for snv-mwplsda,respectively. © 2015 lu xu et al.
آدرس college of material and chemical engineering,tongren university,tongren, China, modernization engineering technology research center of ethnic minority medicine of hubei province,college of pharmacy,south-central university for nationalities, China, college of chemistry and life science,chuxiong normal university, China, college of chemical engineering,zhejiang university of technology, China
 
     
   
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