近红外光谱技术定量测定杨梅汁可溶性固形物

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Abstract Near-infrared transmittance spectra of bayberry juice of different varieties in Zhejiang province were obtained and a quantitative analysis was carried out. Leverage value,studentized residue and sample’s Mahalanobis distance were applied to detect the outlier sample,and different wave number ranges and resolutions were chosen for partial least squares (PLS) regression to abstract spectral information effectively. The best factor,resolution and optimum wave number range were determined. Analysis results show that one sample was an outlier and deleted,and the best model gave the relative high correlation coefficient of 0.957 85,RMSEC,RMSEP and RMSECV of 0.431,0.925 and 1.07° Brix,respectively,when the best wave number range was 4 000-12 267.46 cm^-1,and the best factor and resolution were 8 and 4 cm^-1,respectively. The results indicate that it is feasible to use NIR spectroscopy technique for quantitative analysis of bayberry juice soluble solid content.

Key words：Near-infrared transmittance spectra;Bayberry juice;Soluble solid content;Partial least squares (PLS)

Received: 2007-02-06 Accepted: 2007-04-08

ZTFLH:

S123

Corresponding Authors: LIU Dong-hong E-mail: dhliu@zju.edu.cn

Cite this article:

XIE Li-juan,LIU Dong-hong,ZHANG Yu-huan, et al. Quantitative Determination of Soluble Solid Content in Bayberry Juice Using Near-Infrared Spectroscopy Technique[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(07): 1332-1335.

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https://www.gpxygpfx.com/EN/Y2007/V27/I07/1332

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