Quality evaluation of volatile oils of Traditional Chinese Medicines by using comprehensive two-dimensional gas chromatography (GC×GC)

2003 ◽  
Vol 57 (S1) ◽  
pp. S265-S270 ◽  
Author(s):  
Chunhai Ruan ◽  
Guowang Xu ◽  
Xin Lu ◽  
Ruixiang Hua ◽  
Hongwei Kong ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Quality Evaluation ◽  
Traditional Chinese Medicines ◽  
Two Dimensional ◽  
Volatile Oils ◽  
Chinese Medicines

Characteristic Chromatogram: A Method of Discriminate and Quantitative Analysis for Quality Evaluation of Uncaria Stem with Hooks

Planta Medica ◽  
2017 ◽  
Vol 84 (06/07) ◽  
pp. 449-456 ◽  
Author(s):  
Jinjun Hou ◽  
Ruihong Feng ◽  
Yibei Zhang ◽  
Huiqin Pan ◽  
Shuai Yao ◽  
...  
Keyword(s):  
Quality Evaluation ◽  
Indole Alkaloids ◽  
Total Content ◽  
Traditional Chinese Medicines ◽  
Herbal Drugs ◽  
Chinese Medicines ◽  
Total Analysis Time ◽  
Total Analysis ◽  
Single Standard

AbstractIt remains a challenge to establish new monographs for herbal drugs derived from multiple botanical sources. Specifically, the difficulty involves discriminating and quantifying these herbs with components whose levels vary markedly among different samples. Using Uncaria stem with hooks as an example, a characteristic chromatogram was proposed to discriminate its five botanical origins and to quantify its characteristic components in the chromatogram. The characteristic chromatogram with respect to the components of Uncaria stem with hooks with the five botanical origins was established using 0.02% diethylamine and acetonitrile as the mobile phase. The total analysis time was 50 min and the detection wavelength was 245 nm. Using the same chromatogram parameters, the single standard to determine multicomponents method was validated to simultaneously quantify nine indole alkaloids, including vincosamide, 3α-dihydrocadambine, isocorynoxeine, corynoxeine, isorhynchophylline, rhynchophylline, hirsuteine, hirsutine, and geissoschizine methyl ether. The results showed that only the Uncaria stem with hooks from Uncaria rhynchophylla, the most widely used in the herbal market, showed the presence of these nine alkaloids. The conversion factors were 1.27, 2.32, 0.98, 1.04, 1.00, 1.02, 1.26, 1.33, and 1.25, respectively. The limits of quantitation were lower than 700 ng/mL. The total contents of 31 batches of Uncaria stem with hooks were in the range of 0.1 – 0.6%, except for Uncaria hirsuta Havil and Uncaria sinensis (Oliv.) Havil. The results also showed that the total content of indole alkaloids tended to decrease with an increase in the hook diameter. This showed that the characteristic chromatogram is practical for controlling the quality of traditional Chinese medicines with multiple botanical origins.

scholarly journals Comparison of an Electronic Nose Based on Ultrafast Gas Chromatography, Comprehensive Two-Dimensional Gas Chromatography, and Sensory Evaluation for an Analysis of Type of Whisky

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Paulina Wiśniewska ◽  
Magdalena Śliwińska ◽  
Tomasz Dymerski ◽  
Waldemar Wardencki ◽  
Jacek Namieśnik
Keyword(s):  
Gas Chromatography ◽  
Sensory Evaluation ◽  
Electronic Nose ◽  
Quality Evaluation ◽  
Consumer Preferences ◽  
Function Analysis ◽  
Alcoholic Beverages ◽  
Two Dimensional ◽  
The Usa ◽  
Fast Gc

Whisky is one of the most popular alcoholic beverages. There are many types of whisky, for example, Scotch, Irish, and American whisky (called bourbon). The whisky market is highly diversified, and, because of this, it is important to have a method which would enable rapid quality evaluation and authentication of the type of whisky. The aim of this work was to compare 3 methods: an electronic nose based on the technology of ultrafast gas chromatography (Fast-GC), comprehensive two-dimensional gas chromatography (GC × GC), and sensory evaluation. The selected whisky brands included 6 blended whiskies from Scotland, 4 blended whiskies from Ireland, and 4 bourbons produced in the USA. For data analysis, peak heights of chromatograms were used. The panelists who took part in sensory evaluations included 4 women and 4 men. The obtained data were analyzed by 2 chemometric methods: partial least squares discriminant analysis (PLS-DA) and discrimination function analysis (DFA). E-nose and GC × GC allowed for differentiation between whiskies by type. Sensory analysis did not allow for differentiation between whiskies by type, but it allowed giving consumer preferences.

A new two-dimensional LC–MS/MS-based metabonomics method and its applications in the traditional Chinese medicines and diseases

2008 ◽  
Vol 136 ◽  
pp. S26
Author(s):  
Guowang Xu ◽  
Yuan Wang ◽  
Xinjie Zhao ◽  
Jing Chen ◽  
Peiyuan Yin ◽  
...  
Keyword(s):  
Traditional Chinese Medicines ◽  
Two Dimensional ◽  
Chinese Medicines
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