Rapid determination of complex mixtures by dual-column gas chromatography with a novel stationary phase combination and spectrometric detection

Lambertus, Gordon R.; Crank, Jeffrey A.; Mcguigan, Megan; Kendler, Shai; Armstrong, Daniel W.; Sacks, Richard

doi:10.1016/j.chroma.2006.09.086

Cited by 57 publications

(32 citation statements)

References 44 publications

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“…Figure 4 shows the separation of a 20 component mixture of polyaromatic hydrocarbons and chlorinated pesticides in just over 8 min. Using either a completely or partially crosslinked IL stationary phase column with a standard RTX-1 column in a 2-D GC mode, an enhanced high speed separation of 20 compounds in 150 s was possible [44]. Application to the analysis of organics in headspace above USA currency was made.…”

Section: High Temperature and Crosslinked Ils As Gc Stationary Phasesmentioning

confidence: 99%

Utility of ionic liquids in analytical separations

Shamsi

Danielson

2007

J of Separation Science

179

103

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Ionic liquids (ILs), as separation media, have made significant contributions in the past decades in advancing research in gas chromatography (GC), liquid chromatography (LC), and capillary electrophoresis (CE). This review, covering reports published from the mid 1980s to early 2007, shows how ILs have been used so far in separation science, originally primarily as GC stationary phases and later as mobile phase additives (both millimolar and major percent levels) for LC and CE. Representative GC and LC chromatograms as well as CE electropherograms are shown. In addition, the very recent findings on the development of ionic liquids with surfactant properties and its applications for chiral and achiral analysis are discussed.

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Section: High Temperature and Crosslinked Ils As Gc Stationary Phasesmentioning

confidence: 99%

Utility of ionic liquids in analytical separations

Shamsi

Danielson

2007

J of Separation Science

179

103

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“…Note, if there is any excess silver present the product turns black, then the IL must be resynthesized. The triflate IL columns have been coated using the static coating method at 408C as previously reported [22,25] resulting in a 4 m6100 lm60.08 lm film thickness column. The dication stationary phase 1,9-di(3-vinylimidazolium)nonane triflate will be referred to as the triflate IL column.…”

Section: Column Fabricationmentioning

confidence: 99%

Characterization and utilization of a novel triflate ionic liquid stationary phase for use in comprehensive two‐dimensional gas chromatography

Reid¹,

Crank²,

Armstrong³

et al. 2008

J of Separation Science

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A novel triflate (trifluoromethylsulfonate) ionic liquid (IL) thin film (0.08 microm) stationary phase was implemented for use within the second column of a comprehensive GC x GC configuration. The first column in the configuration had a 5% phenyl/95% dimethyl polysiloxane (DMPS) stationary phase with a 0.4 microm film. The DMPS x IL column configuration was used to separate a mixture of 32 compounds of various chemical functional classes. The GC x GC results for the IL column were compared with a commercially available polar column (with a 0.1 microm PEG stationary phase film) used as the second column instead. Additional studies focused on the rapid and selective separation of four phosphorous-oxygen (P-O) containing compounds from the 32-compound matrix: dimethyl methylphosphonate (DMMP), diethyl methylphosphonate (DEMP), diisopropyl methylphosphonate (DIMP), and triethyl phosphate (TEP). van't Hoff plots (plots of ln k vs. 1/T) demonstrated the difference in retention between the P-O containing compounds (with DMMP reported in detail) and other classes of compounds (i. e., 2-pentanol and n-dodecane as representative) using either the IL column or the commercial PEG column. The selectivity (alpha) of the triflate IL column and the commercially available PEG column were also compared. The IL column provided significantly larger selectivities between DMMP and the other two compounds (2-pentanol and n-dodecane) than the commercial PEG column. The alpha for DMMP relative to n-dodecane was 3.0-fold greater for the triflate IL column, and the alpha for DMMP relative to 2-pentanol was 1.7-fold greater for the triflate IL column than for the PEG column.

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“…Thus, investigation on the chemical structures vs the unique physiochemical properties of organic salts is a hot issue. In particular, bis(imidazolium) salts have been considered as novel solvents and lubricants, 10 ultrastable separation phases, 11,12 and the stationary phases in gas chromatography columns. 7 For some geminal dicationic ionic liquids, the wide range of cation and anion combinations allows various ionic salts.…”

mentioning

confidence: 99%