Determination of retention indices in constant inlet pressure mode and conversion among different column temperature conditions in comprehensive two-dimensional gas chromatography.
A method to determine the second dimensional real retention time, dead times on both dimensions and retention indices in constant inlet pressure mode was developed in comprehensive two-dimensional gas chromatography. At the same time, the conversion of GC x GC retention indices among different column temperature conditions were also conducted based on some thermodynamics parameters. The calculation accuracies are better than 1.0 retention index unit. Furthermore, a retention index database was developed and used to identify the compounds in a cigarette essential oil sample. It showed that identification by the database was of close agreement with by time-of-flight mass spectrometry, and some isomers could also be distinguished based on the retention index database.
Zhu
Shukui
S
National Chromatographic R&A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Lu
Xin
X
Qiu
Yaqiong
Y
Pang
Tao
T
Kong
Hongwei
H
Wu
Caiying
C
Xu
Guowang
G
D000485:Allergens / Q000032:analysis / Q000737:chemistry; D002849:Chromatography, Gas / Q000295:instrumentation* / Q000379:methods*; D005410:Flame Ionization; D008401:Gas Chromatography-Mass Spectrometry; D010476:Perfume / Q000032:analysis / Q000737:chemistry; D011312:Pressure; D015203:Reproducibility of Results; D013696:Temperature
D000485:Allergens; D010476:Perfume