Two Dimensional Gas Chromatography- A Review

2021 ◽  
pp. 293-296
Author(s):  
K. Bhavya Sri ◽  
G. Sri Vani Shailaja ◽  
Mogili. Sumakanth
Keyword(s):  
Gas Chromatography ◽  
Case Studies ◽  
Chromatographic Technique ◽  
Two Dimensional ◽  
Analytical Technique ◽  
Trace Compounds

The birth of two-dimensional gas chromatography is assumed to be the ninetieth year of the last century. Two-dimensional gas chromatography is a rapidly developing analytical technique. GCxGC is a truly hyphenated chromatographic technique which employs a pair of GC column. GCxGC analyses, such as the identification of trace compounds that would not be perceived by 1D-GC. The use of 2D-GC compared to that of 1D-GC has been discussed. The paper presents the introduction, principle of operation, working, uses, application, case studies has been discussed.

scholarly journals Optimization and Validation of a Headspace Solid-Phase Microextraction with Comprehensive Two-Dimensional Gas Chromatography Time-of-Flight Mass Spectrometric Detection for Quantification of Trace Aroma Compounds in Chinese Liquor (Baijiu)

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6910
Author(s):  
Xiaoqing Mu ◽  
Jun Lu ◽  
Mengxin Gao ◽  
Changwen Li ◽  
Shuang Chen
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Time Of Flight ◽  
Aroma Compounds ◽  
Two Dimensional ◽  
Chinese Liquor ◽  
Headspace Solid Phase Microextraction ◽  
Different Types ◽  
Trace Compounds

The detection of trace aroma compounds in samples with complex matrices such as Chinese liquor (Baijiu) requires a combination of several methods, which makes the analysis process very complicated. Therefore, a headspace solid-phase microextraction (HS-SPME) method coupled with two-dimensional gas chromatography time-of-flight mass spectrometry (GC×GC-TOFMS) was developed for the quantitation of a large number of trace compounds in Baijiu. Optimization of extraction conditions via a series of experiments revealed that dilution of the alcohol content of 8 mL of Baijiu to 5%, followed by the addition of 3.0 g of NaCl and subsequent SPME extraction with DVB/CAR/PDMS fiber coating over 45 min at 45 °C was the most suitable. To check the matrix effects, various model Baijiu matrices were investigated in detail. The quantitative method was established through an optimized model synthetic solution, which can identify 119 aroma compounds (esters, alcohols, fatty acids, aldehydes and ketones, furans, pyrazines, sulfur compounds, phenols, terpenes, and lactones) in the Baijiu sample. The developed procedure provided high recovery (86.79–117.94%), good repeatability (relative standard deviation < 9.93%), high linearity (R2 > 0.99), and lower detection limits than reported methods. The method was successfully applied to study the composition of volatile compounds in different types of Baijiu. This research indicated that the optimized HS-SPME–GC×GC-TOFMS method was a valid and accurate procedure for the simultaneous determination of different types of trace compounds in Baijiu. This developed method will allow an improved analysis of other samples with complex matrices.

Differentiation of Geographic Origin of Spices. II. Oregano by Gas Chromatography and Thin Layer Chromatography

1969 ◽  
Vol 52 (6) ◽  
pp. 1184-1189
Author(s):  
William H Stahl Stahl ◽  
Jean N Skarzynski ◽  
William A Voelker
Keyword(s):  
Gas Chromatography ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Geographic Origin ◽  
Chromatographic Technique ◽  
Two Dimensional ◽  
Second Development ◽  
Chromatographic Procedure ◽  
Layer Chromatography

Abstract Both a gas chromatographic and a thin layer chromatographic procedure have been devised to differentiate the origin of oreganos. The gas chromatographic procedure utilizes the observation that the ratio of the concentration of carvacrol to thymol in Greek oregano is approximately 7:1, whereas in Mexican oregano it is 1:1. The decision can be reinforced by a fluorescence thin layer chromatographic technique, using a hexane-ethyl acetate-tetrahydrofuran mixture as the developing solvent. A two-dimensional TLC, using acetone-ethermethylene chloride for the second development, affords a clean-cut separation of all spots and is particularly useful in the diagnosis of mixtures.

Characterization of compounds in crude oils by gas purge micro-syringe extraction coupled to comprehensive two-dimensional gas chromatography

2014 ◽  
Vol 32 (10) ◽  
pp. 1144
Author(s):  
Ting TONG ◽  
Wanfeng ZHANG ◽  
Donghao LI ◽  
Jinhua ZHAO ◽  
Zhenyang CHANG ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Crude Oils ◽  
Two Dimensional ◽  
Gas Purge

New Methods for Analyzing Water Pollutants

1982 ◽  
Vol 14 (4-5) ◽  
pp. 59-71 ◽  
Author(s):  
L H Keith ◽  
R C Hall ◽  
R C Hanisch ◽  
R G Landolt ◽  
J E Henderson
Keyword(s):  
Amino Acids ◽  
Gas Chromatography ◽  
Two Dimensional ◽  
Gas Chromatograph ◽  
New Class ◽  
New Methods ◽  
System A ◽  
Drinking Waters ◽  
Computer Controlled ◽  
Nitrogen Containing Compounds

Two new methods have been developed to analyze for organic pollutants in water. The first, two-dimensional gas chromatography, using post detector peak recycling (PDPR), involves the use of a computer-controlled gas Chromatograph to selectively trap compounds of interest and rechromatograph them on a second column, recycling them through the same detector again. The second employs a new detector system, a thermally modulated electron capture detector (TMECD). Both methods were used to demonstrate their utility by applying them to the analysis of a new class of potentially ubiquitous anthropoaqueous pollutants in drinking waters- -haloacetonitriles. These newly identified compounds are produced from certain amino acids and other nitrogen-containing compounds reacting with chlorine during the disinfection stage of treatment.

Forensic potential of comprehensive two-dimensional gas chromatography

2016 ◽  
Vol 80 ◽  
pp. 345-363 ◽  
Author(s):  
Andjoe Sampat ◽  
Martin Lopatka ◽  
Marjan Sjerps ◽  
Gabriel Vivo-Truyols ◽  
Peter Schoenmakers ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Two Dimensional

Analysis of synthetic canine training aids by comprehensive two-dimensional gas chromatography–time of flight mass spectrometry

2012 ◽  
Vol 1255 ◽  
pp. 202-206 ◽  
Author(s):  
Sonja Stadler ◽  
Pierre-Hugues Stefanuto ◽  
Jonathan D. Byer ◽  
Michał Brokl ◽  
Shari Forbes ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Time Of Flight ◽  
Two Dimensional ◽  
Flight Mass Spectrometry ◽  
Training Aids ◽  
Canine Training
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