title: Determination of retention indices in constant inlet pressure mode and conversion among different column temperature conditions in comprehensive two-dimensional gas chromatography.
abstract: 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.
authors.affiliation: National Chromatographic R&A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
authors.forename: Shukui
authors.initials: S
authors.lastname: Zhu
authors.forename: Xin
authors.initials: X
authors.lastname: Lu
authors.forename: Yaqiong
authors.initials: Y
authors.lastname: Qiu
authors.forename: Tao
authors.initials: T
authors.lastname: Pang
authors.forename: Hongwei
authors.initials: H
authors.lastname: Kong
authors.forename: Caiying
authors.initials: C
authors.lastname: Wu
authors.forename: Guowang
authors.initials: G
authors.lastname: Xu
mesh_terms: 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
chemical_list: D000485:Allergens; D010476:Perfume