基于有效波长选择的近红外光谱枸杞总糖含量快速检测

doi:10.7506/spkx1002-6630-201612018

食品科学

基于有效波长选择的近红外光谱枸杞总糖含量快速检测

许生陆，高媛，胡国梁，于修烛，张睿

1.西北农林科技大学食品科学与工程学院，陕西杨凌 712100；2.温州市市场监督管理局，浙江温州 325000

出版日期:2016-06-25 发布日期:2016-06-29
通讯作者: 于修烛
基金资助:
中央高校基本科研业务费专项（QN2013057）

Rapid Determination of Total Sugar Content of Goji Berries (Lycium barbarum) by Near Infrared Spectroscopy with Effective Wavenumber Selection

XU Shenglu, GAO Yuan, HU Guoliang, YU Xiuzhu, ZHANG Rui

1. College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China;
2. Market Supervision Administration of Wenzhou, Wenzhou 325000, China

Online:2016-06-25 Published:2016-06-29
Contact: YU Xiuzhu

摘要/Abstract

摘要：

为建立枸杞总糖含量快速准确的检测方法，采用近红外光谱为检测手段，以114 个不同产区枸杞样品为研究对象。采用积分球漫反射模式采集样品近红外光谱，利用化学计量学方法确定光谱信息与总糖含量之间的关系，通过载重图法及相关系数法进行有效光谱选择，比较确定枸杞总糖光谱建模有效波段，建立枸杞总糖近红外光谱定量检测模型，并利用国标方法进行验证分析。结果发现：对全样品光谱进行Norris Gap Derivative求导预处理后，采用相关系数法选择8 700～4 000 cm－1波段进行建模。当主成分数为8时，建模效果较好，模型的校正集决定系数与验证集决定系数均高于0.91。结果表明，基于近红外光谱技术的枸杞总糖含量快速检测是可行的。

关键词: 枸杞, 近红外光谱, 有效波长, 总糖, 定量分析

Abstract:

This study developed a rapid and accurate method for the determination of total sugar in Goji berries (Lycium
barbarum) by using Fourier transform near infrared (NIR) spectroscopy. A total of 114 samples collected from various
producing areas were detected by NIR spectroscopy for the acquisition of spectra in the integrating sphere diffuse reflectance
mode. The relationship between spectral information and total sugar content was established using a chemometric method.
The effective wavenumbers by X-loading weights and correlation coefficients were selected. A quantitative model for
predicting the total sugar content of Goji berries was developed and verified. The results showed that the model was built
with spectral pretreatment using Norris Gap Derivative, and effective wavenumbers (EWs) of 8 700–4 000 cm-1 chosen by
correlation coefficients. The coefficients of determination for calibration (Rc²) and for validation (Rv²) of the model were
both higher than 0.91 when the number of principal components (PCs) was 8. The above results demonstrate that rapid
determination of the total sugar content of Goji berries by NIR is workable.

Key words: Goji berries (Lycium barbarum), near infrared (NIR) spectroscopy, effective wavenumbers, total sugar, quantitative analysis

中图分类号:

TS207.3

许生陆，高媛，胡国梁，于修烛，张睿. 基于有效波长选择的近红外光谱枸杞总糖含量快速检测[J]. 食品科学, doi: 10.7506/spkx1002-6630-201612018.

XU Shenglu, GAO Yuan, HU Guoliang, YU Xiuzhu, ZHANG Rui. Rapid Determination of Total Sugar Content of Goji Berries (Lycium barbarum) by Near Infrared Spectroscopy with Effective Wavenumber Selection[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201612018.

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基于有效波长选择的近红外光谱枸杞总糖含量快速检测

Rapid Determination of Total Sugar Content of Goji Berries (Lycium barbarum) by Near Infrared Spectroscopy with Effective Wavenumber Selection

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