Solid-phase microextraction—On-fibre derivatization with comprehensive two dimensional gas chromatography analysis oftrans-resveratrol in wine

2003 ◽  
Vol 57 (S1) ◽  
pp. S349-S353 ◽  
Author(s):  
Y. Shao ◽  
P. Marriott ◽  
H. Hügel
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Two Dimensional ◽  
Chromatography Analysis ◽  
Gas Chromatography Analysis

scholarly journals Headspace solid-phase microextraction procedure for gas-chromatography analysis of toluene in urine

2008 ◽  
Vol 19 (6) ◽  
pp. 1201-1206 ◽  
Author(s):  
Diego C. Netto ◽  
Rafael M. Reis ◽  
Camila B. Mendes ◽  
Paulo C. F. L. Gomes ◽  
Isarita Martins ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Headspace Solid Phase Microextraction ◽  
Chromatography Analysis ◽  
Gas Chromatography Analysis

scholarly journals Solid-phase microextraction of benzophenones coupled with gas chromatography analysis

2016 ◽  
Vol 4 (2) ◽  
pp. 55-62
Author(s):  
Valentyna Levchyk ◽  
M. Zui
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Enrichment Factors ◽  
Chromatography Analysis ◽  
Fiber Coating ◽  
Flame Ionization ◽  
Gas Chromatography Analysis ◽  
Relative Standard ◽  
Ph Range

In this study, solid-phase microextraction method combines with gas chromatography-flame ionization detector. The proposed method is used for the preconcentration of some benzophenones. Influence of different factors on the efficiency of extraction is described in detail. The analytical procedure was optimized for fiber coating selection, extraction time, temperature, sample pH, ionic strength. For all benzophenones, the highest enrichment factors were achieved using carboxen/polydimethylsiloxane/divinylbenzene fibre immersed directly into the water samples, containing 100 mg/mL of sodium chloride, at room temperature. The optimum pH range is 5.0 – 7.0. The relative standard deviations (RSDs) were from 1.3 to 10.0 % (n = 3). The method was applied to the determination of benzophenone, benzophenone-3, 2-hydroxybenzophenone in the lake water and urine.

Assessment of the effect of the non-volatile wine matrix on the volatility of typical wine aroma compounds by headspace solid phase microextraction/gas chromatography analysis

2011 ◽  
Vol 91 (13) ◽  
pp. 2484-2494 ◽  
Author(s):  
Juan José Rodríguez-Bencomo ◽  
Carolina Muñoz-González ◽  
Inmaculada Andújar-Ortiz ◽  
Pedro Jose Martín-Álvarez ◽  
Maria Victoria Moreno-Arribas ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Aroma Compounds ◽  
Wine Aroma ◽  
Headspace Solid Phase Microextraction ◽  
Chromatography Analysis ◽  
Gas Chromatography Analysis ◽  
Wine Matrix

Evaluation of Orchid-Like Aroma Between Different Grades of Taiping Houkui Tea by Solid-Phase Microextraction and Comprehensive Two-Dimensional Gas Chromatography Coupled with Time-of-Fight Mass Spectrometry

2020 ◽  
Vol 103 (2) ◽  
pp. 433-438
Author(s):  
Chen Qi ◽  
Guo Tianyang ◽  
Wu Qiong ◽  
Yao Jian ◽  
Liao Renyi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Low Grade ◽  
Two Dimensional ◽  
Material Basis ◽  
Quality Grade ◽  
Gaseous Sample ◽  
Grade One

Abstract Background: Taiping houkui tea won the title of “the King of Green Tea” at the International Tea Exposition in 2004, which had an orchid fragrance but the material basis of the orchid fragrance had not been revealed yet. Objective: To investigate the material basis of the orchid fragrance and identify the quality grade of Taiping houkui tea. Methods: A method was developed for evaluating orchid-like aroma between different grades Taiping houkui tea by solid-phase micro extraction (SPME) and comprehensive two-dimensional gas chromatography coupled with time-of-fight mass spectrometry (GC×GC-TOFMS). The crushed tea sample in a 25 mL headspace bottle was incubated at 90°C for 10 min. Then the gaseous sample was extracted by SPME divinylbenzene/polydimethylsiloxane fiber for 50 min and thermally desorpted at 250°C for 2 min. Results: In total, 735 volatile compounds were determined by SPME- GC×GC-TOFMS and 15 compounds were related to orchid-like aroma. Conclusions: The high-quality Taiping houkui tea has the orchid fragrance and the low-grade one does not; thus orchid-like aroma can be used as a reference of grades of Taiping houkui tea. Highlights: Thirty different grades of Taiping houkui tea samples were compared and analyzed experimentally, and the results showed that the special aroma substances, which played a key role in grade discrimination of Taiping houkui tea, were found by the statistical method.

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