Capillary complexation gas chromatography in analysis of cyclic and aromatic hydrocarbons

Wawrzyniak, Rafał; Wasiak, W.

doi:10.1007/bf02492816

Cited by 5 publications

(5 citation statements)

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“…Capillary columns coated with al iquid stationary phasec ontaining cyano (3-cyanopropylmethylpolysiloxane) and thiol groups (3-mercaptopropylmethylpolysiloxane) were modified by bonding chlorides of copper (II), nickel (II), and cobalt (II). [32][33][34] Thea uthors of Refs. [32][33][34] characterized the packings by studying their interactionsw ith such adsorbates as aliphatic and aromatic halogenated hydrocarbons, [32] cyclic and aromatic hydrocarbons, [33] and cyclic and chlorohydrocarbons.…”

Section: Stationary Phases For Complexation Gas Chromatographymentioning

confidence: 99%

“…[32][33][34] Thea uthors of Refs. [32][33][34] characterized the packings by studying their interactionsw ith such adsorbates as aliphatic and aromatic halogenated hydrocarbons, [32] cyclic and aromatic hydrocarbons, [33] and cyclic and chlorohydrocarbons. [34] Research on the scopeo fc omplexation gas chromatography was directed towards the capillary columns coated with ap orous adsorbent layer of the electron-donor properties.T hey have been realizeda saresult of the synthesis of as eries of silica adsorbents with the phases chemically bonded to ketoimino groupsd iffering by the types of substituents and the places of their substitutions.S everal works [35][36][37][38] describe the properties of electron-donor-acceptor adsorbents obtainedb ybondingt ransition metal salts such as Cu (II), Ni (II),a nd Cr (III).…”

Section: Stationary Phases For Complexation Gas Chromatographymentioning

confidence: 99%

“…The next step in the evolution of CGC was to apply the silica, modified with suitable functional groups, as a stationary phase for the capillary columns. Capillary columns coated with a liquid stationary phase containing cyano (3‐cyanopropylmethylpolysiloxane) and thiol groups (3‐mercaptopropylmethylpolysiloxane) were modified by bonding chlorides of copper (II), nickel (II), and cobalt (II) . The authors of Refs.…”

Section: Introductionmentioning

confidence: 99%

“…The authors of Refs. characterized the packings by studying their interactions with such adsorbates as aliphatic and aromatic halogenated hydrocarbons, cyclic and aromatic hydrocarbons, and cyclic and chlorohydrocarbons …”

Section: Introductionmentioning

confidence: 99%

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Stationary Phases for Complexation Gas Chromatography and Microextraction Methods

Rykowska

Wasiak

2016

Israel Journal of Chemistry

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The main goal of this review is to provide an overview of the trends in the technological development of complexation gas chromatography. This kind of chromatography, despite the passage of years, continues to offer new opportunities. The authors would like to show how complexation gas chromatography evolved over the years, due to the variety of stationary phases with complexation properties, their ability to separate, very specifically, the structures of the molecules and chemical compounds, improving the quality of the obtained results, and continuously lowering the detection limits of the analysed compounds in very complex matrices, including environmental and medical samples. The work is dedicated to the memory of Professor E. Gil‐Av, whose scientific achievements were the inspiration for the improvement and widening of the research on the use of complexing metal ions and coordination metal compounds for selective separation in gas chromatography.

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Section: Stationary Phases For Complexation Gas Chromatographymentioning

confidence: 99%

Section: Stationary Phases For Complexation Gas Chromatographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stationary Phases for Complexation Gas Chromatography and Microextraction Methods

Rykowska

Wasiak

2016

Israel Journal of Chemistry

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“…Polybutadiene can efficiently abduct Cu(I), Ag(I), and Au(I) during laser ionization in the ion source of a mass spectrometer . A number of TMs such as Pd(II), Cu(II), Ni(II), Zn(II), Eu(II), and La(III) have been shown to enhance the gas chromatographic resolution of chiral, nucleophilic, and unsaturated compounds . However, to the best of our knowledge, the only TMs studied for the liquid chromatographic separation of unsaturated compounds besides silver salts are rhodium(II) acetate and thallium(I) nitrate , which were found to interact weakly with isomeric butenes.…”

Section: Introductionmentioning

confidence: 99%

The unique liquid chromatographic properties of Group 11 transition metals for the separation of unsaturated organic compounds

Aponte

Dillon

Huang

2013

J of Separation Science

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Silver(I) and copper(I) are known to form reversible complexes with π bonds, which have been exploited in LC for separating unsaturated organic compounds. Prominent examples include the use of AgNO3-impregnated silica gel in LC, and the use of copper(I) salts for selective extraction of alkenes from hydrocarbon mixtures. The Dewar-Chatt-Duncanson model is often invoked to explain the interaction between Ag(I) and Cu(I) and π bonds. However, it is unclear if such a reversible interaction is directly related to their d(10) outer electronic configurations. Particularly, Au(I) has not been reported to separate olefins with different numbers of double bonds in LC. Also, there has not been a systematic comparison of the liquid chromatographic properties of other d(10) transition metal salts (e.g., Zn(II), Cd(II)), making it difficult to fully understand the observed reversible interactions of Ag(I) and Cu(I) with π bonds. We demonstrate for the first time that silica gel impregnated with all three Group 11 transition metals with 1+ oxidation state strongly and similarly retain olefin compounds in LC, while transition metals from Groups 10 and 12 do not. We also tested a range of functionalized silica gels to improve the stability of Cu(I) and Au(I) ions on the surface of the silica.

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Palladium(II) chelate of tetradentate Schiff base as mixed stationary phase for gas chromatography

Laghari

Khuhawar²,

Ali

2007

J of Separation Science

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Bis(acetylacetone)ethylenediiminepalladium(II) (PdAA2en) was examined as a mixed stationary phase with OV-1 on Chromosorb G/NAW 60-80 mesh size for the GC separation of aromatic hydrocarbons, heteroaromatics, alcohols, aldehydes, ketones, esters, and nitro compounds. Forty-two compounds were examined and the GC results were compared with those obtained with 3% OV-1 on Chromosorb G/NAW 60-80 mesh size under similar operating conditions. Improved resolution, peak asymmetry, theoretical plate numbers, and Kovats indices were obtained on the mixed stationary phase of 3% OV-1 + 5% PdAA2en compared to 3% OV-1 column. The stability constant (Km), enthalpies (deltaH), entropies (deltaS), and Gibbs free energies (deltaG) of the GC elution on the column (2 m x 3 mm id) packed with 3% OV-1 + 5% PdAA2en on Chromosorb G/NAW 60-80 mesh size have been calculated. Donor-acceptor complexation in the gas phase is indicated by negative values of enthalpy (-deltaH) within 5.81 to 10.89 kcal/mol and Gibbs free energy (-deltaG) from 1.34 to 4.08 kcal/mol. The retention time transformations on both the phases were calculated and the ratios obtained from the stationary phases 3% OV-1 and 3% OV-1 + 5% PdAA2en were plotted on the x-axis and the y-axis, respectively, and the coefficients of determination for alkanes, aromatic and heteroaromatics, ketones, and alcohols were observed to lie within 0.5253 to 0.9742, indicative of some different kinds of interaction of the two stationary phases with the solutes.

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Capillary complexation gas chromatography in analysis of cyclic and aromatic hydrocarbons

Cited by 5 publications

References 15 publications

Stationary Phases for Complexation Gas Chromatography and Microextraction Methods

Stationary Phases for Complexation Gas Chromatography and Microextraction Methods

The unique liquid chromatographic properties of Group 11 transition metals for the separation of unsaturated organic compounds

Palladium(II) chelate of tetradentate Schiff base as mixed stationary phase for gas chromatography

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