食品科学 ›› 2014, Vol. 35 ›› Issue (2): 164-167.doi: 10.7506/spkx1002-6630-201402030

• 分析检测 • 上一篇    下一篇

基于近红外光谱的中宁枸杞子判别分析

许春瑾,张 睿,于修烛*,王 宁   

  1. 西北农林科技大学食品科学与工程学院,陕西 杨凌 712100
  • 收稿日期:2013-04-22 修回日期:2013-12-30 出版日期:2014-01-25 发布日期:2014-02-19
  • 通讯作者: 于修烛 E-mail:xiuzhuyu1004@hotmail.com
  • 基金资助:

    “十二五”国家科技支撑计划项目(2012BAD36B04)

Discrimination of Chinese Wolfberry from Zhongning Based on Near Infrared Spectroscopy

XU Chun-jin, ZHANG Rui, YU Xiu-zhu*, WANG Ning   

  1. College of Food Science and Engineering, Northwest A & F University, Yangling 712100, China
  • Received:2013-04-22 Revised:2013-12-30 Online:2014-01-25 Published:2014-02-19
  • Contact: YU Xiuzhu E-mail:xiuzhuyu1004@hotmail.com

摘要:

为实现中宁枸杞子产地的自动化快速鉴别,利用近红外光谱仪对不同产地42 个枸杞子样品进行扫描,对 枸杞子近红外光谱分别进行距离判别分析和聚类分析,建立枸杞子产地判别模型。结果表明:在6 500~5 200 cm-1波 数范围内,采用多元散射校正和标准正态变量变换预处理,对样品的识别率均达到100%,模型预测效果好;采用 马氏距离结合离差平方和法,枸杞子可分为宁夏中宁枸杞和非宁夏中宁枸杞两大类群,样品判别率达到96.9%。利 用近红外光谱对中宁枸杞子产地判别分析是可行的。

关键词: 枸杞子, 近红外光谱, 判别分析, 聚类分析

Abstract:

To develop an automatic and quick method to discriminate the geographical origin of Chinese wolfberry from
Zhongning, 42 Chinese wolfberry samples from different regions in China were scanned with a near infrared spectrometer
(NIR). The NIR spectral data of wolfberry samples were analyzed with distance discriminant analysis (DDA) and cluster
analysis to discriminate their geographical origins. The DDA analysis indicated that good prediction results were achieved
with 100% recognition rate for the origin of wolfberry based on the multiplicative scatter correction and standard normal
variate transformation of spectral data ranging from 6 500 to 5 200 cm-1. The wolfberry samples could be clustered into
two groups using the Mahalanobis distances in combination with the Ward’s method: one group consisting of those from
Zhongning, Ningxia and the other from other regions. The recognition rate was 96.9%. In conclusion, it is feasible to apply
NIR to discriminate the geographical origin of Chinese wolfberry from Zhongning.

Key words: Chinese wolfberry, near infrared spectrometer (NIS), discrimination analysis, cluster analysis

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