TITLE:
Near-Infrared Spectroscopy Combined with Absorbance Upper Optimization Partial Least Squares Applied to Rapid Analysis of Polysaccharide for Proprietary Chinese Medicine Oral Solution
AUTHORS:
Jiexiong Su, Xinkai Gao, Lirong Tan, Xianzhao Liu, Yueqing Ye, Yifang Chen, Kaisheng Ma, Tao Pan
KEYWORDS:
Near-Infrared Spectroscopic Analysis, Proprietary Chinese Medicine Oral Solution, Polysaccharide, Absorbance Upper Optimization Partial Least Squares
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.7 No.3,
March
16,
2016
ABSTRACT: Near-infrared (NIR)
spectroscopy was applied to reagent-free quantitative analysis of polysaccharide
of a brand product of proprietary Chinese medicine (PCM) oral solution samples.
A novel method, called absorbance upper optimization partial least squares (AUO-PLS),
was proposed and successfully applied to the wavelength selection. Based on varied
partitioning of the calibration and prediction sample sets, the parameter optimization
was performed to achieve stability. On the basis of the AUO-PLS method, the
selected upper bound of appropriate absorbance was 1.53 and the corresponding wavebands
combination was 400 - 1880 & 2088 - 2346 nm. With the use of random validation
samples excluded from the modeling process, the root-mean-square error and correlation
coefficient of prediction for polysaccharide were 27.09 mg·L-1 and 0.888, respectively. The results indicate that the
NIR prediction values are close to those of the measured values. NIR spectroscopy
combined with AUO-PLS method provided a promising tool for quantification of the
polysaccharide for PCM oral solution and this technique is rapid and simple when
compared with conventional methods.