全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于净分析物预处理算法的绿茶中儿茶素的近红外光谱定量分析

Keywords: 近红外光谱,净分析物预处理法,偏最小二乘,儿茶素

Full-Text   Cite this paper   Add to My Lib

Abstract:

由于原始近红外光谱数据中含有与待测组分不相关的噪音及冗余信息,增加了偏最小二乘法(PLS)模型的复杂程度.为了简化儿茶素的预测模型,采用净分析物预处理法(NAP)对近红外光谱进行预处理,提取出待测组分的净分析物信号,然后利用PLS建立绿茶中三种儿茶素(EGCG、ECG和EGC)含量的(NAP/PLS)模型.在模型建立过程中,通过交互验证的方法优化NAP因子数及模型的主成分因子数,并且将NAP的结果与经典的标准正态变量(SNV)光谱预处理结果相比较.比较结果显示,经过NAP与SNV光谱预处理后,模型的预测结果相差不大,但是经过净分析物预处理后,模型的主成分因子数大大降低.研究结果表明,NAP光谱预处理算法能在保证精度的前提下有效地简化绿茶中儿茶素含量的预测模型.

References

[1]  LIU Yan-De,LUO Ji,CHEN Xing-Miao. Analysis of solu-ble solid content in Nanfeng mandarin fruit with visible near infrared spectroscopy[J]. J. Infrared Millim. Waves (刘燕 德,罗吉,陈兴苗.可见/近红外光谱的南丰蜜桔可溶性 固形物含量定量分析.红外与毫米波学报 ),2008,27(2):119-122.
[2]  【9】CHU Xiao-Li, YUAN Hong-Fu, LU Wan-Zhen. Progress and application of spectral data pretreatment and wavelength selection methods in NIR analytical technique[J]. Progress in Chemistry (褚小立, 袁洪福, 陆婉珍.近红外分析中光 谱预处理及波长选择方法进展与应用. 化学进展 ), 2004, 16 (4):528—542.
[3]  【10】Hector C, Goicoechea, Alejandro C O. A comparison of or- thogonal signal correction and net analyte preprocessing meth- ods. Theoretical and experimental study[J]. Chemometrics and Intelligent Laboratory Systems, 2001, 56 (2):73—81.
[4]  【11】ZHAO Jie-Wen, ZHANG Hai-Dong, LIU Mu-Hua. Prepro- cessing methods of near-infrared spectra for simplifying pre- diction model of sugar content of apples[J]. Acta Optica Sinica (赵杰文, 张海东, 刘木华.简化苹果糖度预测模型 的近红外光谱预处理方法. 光学学报 ), 2006, 26 (1): 136—140.
[5]  【12】Lee Y, Chung Hoeil, Arnold M. A Improving the robust- ness of a partial least squares (PLS) model based on pure component selectivity analysis and range optimization: Case study for the analysis of an etching solution containing hy- drogen peroxide[J]. Analytica Chimica Acta, 2006, 572 (1):93—101.
[6]  【1】赵杰文,王开亮,欧阳琴,陈全胜, "高光谱技术分析茶树叶片中叶绿素含量及分布",光谱学与光谱分析 31, 512-515(2011)
[7]  【1】YUAN Xian-Qiang, WANG Yue-Fei, CHEN Liu-Ji. Tea Polyphenol Chemistry [M]. Shanghai: Shanghai Science and Technology Press (杨贤强, 王岳飞, 陈留记. 茶多酚 化学 .上海:上海科学技术出版社), 2003:412—422.
[8]  【2】Friedman M, Levin, C E, Choi S H, et al. HPLC analysis of catechins, theaflavins, and alkaloids in commercial teas and green tea dietary supplements: comparison of water and 80% ethanol/water extracts[J]. Journal of Food Science, 2006, 71 (6):328—337.
[9]  【3】Kotani A, Takahashi K, Hakamata H, et al . Attomole cate- chins determination by capillary liquid chromatography with electrochemical detection[J]. Analytical Sciences, 2007, 23 (2):157—163.
[10]  【4】Chen Q S, Zhao J W, Liu M H, et al . Detection of total polyphenols content in green tea using FT-NIR spectroscopy and different PLS algorithms[J]. Journal of Pharmaceutical and biomedical Analysis, 2008, 46 (3):568—573.
[11]  【5】Luypaert J, Zhang M H, Massart D L. Feasibility study for the use of near infrared spectroscopy in the qualitative and quantitative analysis of green tea, Camellia sinensis (L.) [J]. Analytica Chimica Acta, 2003, 478 (2):303—312.
[12]  【6】Chen Q S, Zhao J W, Zhang H D, et al. Feasibility study on qualitative and quantitative analysis in tea by near infra- red spectroscopy with multivariate calibration[J]. Analytica Chimica Acta, 2006, 572 (1):77—84.
[13]  WU Di,FENG Lei,ZHANG Chuan-Qing,et al. Early De-tecti On Of Gray Mold (Cinerea) On Eggplant Leaves Based On ViS/Near Infrared Spectra[J]. J. Infrared Mil-lim. Waves (吴迪,冯雷,张传清,等.基于可见/近红外光.谱技术的茄子叶片灰霉病早期检测研究.红外与毫米波 学报 ),2007,26(4):269-273.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133