MilliporeSigma
  • Home
  • Search Results
  • Comparison between ATR-IR, Raman, concatenated ATR-IR and Raman spectroscopy for the determination of total antioxidant capacity and total phenolic content of Chinese rice wine.

Comparison between ATR-IR, Raman, concatenated ATR-IR and Raman spectroscopy for the determination of total antioxidant capacity and total phenolic content of Chinese rice wine.

Food chemistry (2015-10-17)
Zhengzong Wu, Enbo Xu, Jie Long, Xiaowei Pan, Xueming Xu, Zhengyu Jin, Aiquan Jiao
ABSTRACT

The application of attenuated total reflectance infrared spectroscopy (ATR-IR), Raman spectroscopy (RS) and combination of ATR-IR and RS for measurements of total antioxidant capacity (TAC) and total phenolic content (TPC) of Chinese rice wine (CRW) were investigated in this study. Synergy interval partial least-squares (SiPLS), support vector machine (SVM) and principal component analysis (PCA) were applied to process the merged data from two individual instruments. It was observed that the performances of models based on the RS spectra were better than those based on the ATR-IR spectra. In addition, SVM models based on the efficient information extracted from ATR-IR and RS spectra were superior to PLS models based on the same information and PLS models based on ATR-IR or RS spectra. The overall results demonstrated that integrating ATR-IR and RS was possible and could improve the prediction accuracy of TAC and TPC in CRWs.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Hydrogen chloride solution, 1.0 M in diethyl ether
Sigma-Aldrich
Hydrochloric acid, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., fuming, ≥37%, APHA: ≤10
Sigma-Aldrich
Acetic acid, glacial, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.8%
Sigma-Aldrich
Acetic acid, glacial, puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, 99.8-100.5%
Sigma-Aldrich
Hydrogen chloride solution, 1.0 M in acetic acid
Sigma-Aldrich
Hydrochloric acid, 37 wt. % in H2O, 99.999% trace metals basis
Sigma-Aldrich
Sodium carbonate, ACS reagent, anhydrous, ≥99.5%, powder or granules
Sigma-Aldrich
Sodium carbonate, ACS reagent (primary standard), anhydrous, 99.95-100.05% dry basis
Sigma-Aldrich
Hydrochloric acid, ACS reagent, 37%
Sigma-Aldrich
Methanol, ACS reagent, ≥99.8%
Sigma-Aldrich
Methanol, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.8% (GC)
Sigma-Aldrich
Methanol, puriss., meets analytical specification of Ph Eur, ≥99.7% (GC)
Sigma-Aldrich
Methanol, BioReagent, ≥99.93%
Sigma-Aldrich
Acetic acid solution, suitable for HPLC
Sigma-Aldrich
Sodium acetate, puriss. p.a., ACS reagent, reag. Ph. Eur., anhydrous
Sigma-Aldrich
Hydrogen chloride solution, 2.0 M in diethyl ether
Sigma-Aldrich
Acetic acid, glacial, ≥99.99% trace metals basis
Sigma-Aldrich
Hydrogen chloride solution, 4.0 M in dioxane
Sigma-Aldrich
Sodium acetate, ACS reagent, ≥99.0%
Supelco
Ethanol solution, certified reference material, 2000 μg/mL in methanol
Sigma-Aldrich
Quercetin, ≥95% (HPLC), solid
Sigma-Aldrich
Acetic acid-12C2, 99.9 atom % 12C
Sigma-Aldrich
Hydrochloric acid solution, 32 wt. % in H2O, FCC
Sigma-Aldrich
Sodium carbonate, BioXtra, ≥99.0%
Supelco
Hydrochloric acid solution, volumetric, 0.1 M HCl (0.1N), endotoxin free
Sigma-Aldrich
Hydrochloric acid solution, 1.0 N, BioReagent, suitable for cell culture
Supelco
Ethanol standards 10% (v/v), 10 % (v/v) in H2O, analytical standard
Sigma-Aldrich
Ethanol Fixative 80% v/v, suitable for fixing solution (blood films)
Sigma-Aldrich
Sodium acetate, anhydrous, for molecular biology, ≥99%
Sigma-Aldrich
Sodium acetate, meets USP testing specifications, anhydrous