Capillary complexation gas chromatography in analysis of halohydrocarbons

Wawrzyniak, Rafał; Wasiak, W.

doi:10.1007/bf02575277

Cited by 10 publications

(10 citation statements)

References 23 publications

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“…The interactions between the phases and the hydrocarbons are described using the following parameters: retention coefficient (k), retention index (/), molecular retention index (AMe) and specific retention volume (Vg). Results of similar studies obtained for ethers, thioethers, ketones and halogeno-hydrocarbons were discussed in our earlier work [5,6]. …”

Section: Introductionmentioning

confidence: 62%

Capillary complexation gas chromatography in analysis of cyclic and aromatic hydrocarbons

Wawrzyniak

Wasiak

2000

Chromatographia

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SummaryResults of studies on stationary phases containing copper(II), nickel(II) and cobalt(lI) chloride chemically bonded via cyano -or thiol groups are presented. The retention parameters -i.e. retention factor (k), retention index (I) and molecular retention index (AMe) and specific retention volume (Vg) -enabled the characteristics of specific interaction between aromatic and cyclic hydrocarbons and metal complexes chemically bonded to stationary phases to be determined.

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Section: Introductionmentioning

confidence: 62%

Capillary complexation gas chromatography in analysis of cyclic and aromatic hydrocarbons

Wawrzyniak

Wasiak

2000

Chromatographia

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“…The study reported in this paper is a continuation of our earlier work on the stationary phases comprising ketoimine groups [7,8]. The columns differed in the type of substituent bonded to the nitrogen atom in the ketoimine group and the type of transition metal dichloride complex.…”

Section: Introductionmentioning

confidence: 91%

“…The amount of the transition metals bonded to the adsorbent was established on the basis of the measurements on an ICP-OES spectrophotometer. Prior to the determination, metal salts were extracted from the adsorbents with a solution of 2-propanol/35.8% hydrochloric acid (1:1) [7]. As follows from the results presented in Table 1, the degree of the silica coverage was 75%, and the yield of the reaction leading to obtaining ketoimine groups was 84%.…”

Section: Physico-chemical Characterisation Of the Column Covermentioning

confidence: 99%

Quantitative relationship and application of 3‐benzylketoimine metal dichlorides in the analysis of volatile hydrocarbons

Wawrzyniak¹

2009

J of Separation Science

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Quantitative relationship and application of 3-benzylketoimine metal dichlorides in the analysis of volatile hydrocarbonsThe paper concerns the analysis of volatile hydrocarbons on newly designed and produced capillary columns. According to the type of coating used, the columns are of the PLOT type, and according to the adsorbate-adsorbent type interactions they belong to the category of complexation GC. The adsorbent used was silica, whose surface was modified with bonded 2-(3-triethoxysilylpropylimino)-3-(benzyl)-pentanone-4 to change the adsorption characteristics. The presence of the ketoimine group of strongly electron-accepting properties permitted the binding of transition metals. The metal ions are capable of interacting selectively with nucleophilic compounds including olefins. The transition metal ions used for sorbent modification were copper(II) chlorides and nickel(II) chlorides. The supported adsorbent was immobilised by bonding the modified silica to the column walls by a film of poly(dimethylsiloxane). Due to this strategy, the coating was very stable, no sorbent loss from the column was observed and the column could be washed with solvent. Besides exemplary separations, the paper quotes retention parameters of the group of compounds analysed and presents a discussion of the specific interactions between the adsorbate and adsorbent.

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“…The present work dealing with ethers, thioethers and ketones is a continuation of an earlier study on the same phases used for the analysis of halohydrocarbons [9].…”

Section: Tmahmentioning

confidence: 98%

Transition metal complex stationary phases for the CGC analysis of ethers, thioethers and ketones

Wawrzyniak

Wasiak

1999

Chromatographia

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SummaryThe use of polysiloxanes with cyano or thiol groups as stationary phases for complexation gas chromatography is discussed. The polymers were obtained via polycondensation followed by polymerisation of the corresponding dichloro-or dimethoxy-silanes. Both the phases were modified by bonding transition metal chlorides with cyano (CuC12 or COC12) and thiol groups (NiC12 or COC12). The phases were examined in order to determine their application to the analysis of ethers, thioethers and ketones. Due to the presence of lone electron pairs on oxygen or sulphur atoms, the compounds should be capable of specific interacting with the electron-withdrawing centre of the liquid stationary phases. A number of retention parameters (retention indices, molecular retention indices and specific retention volume) were determined, which allowed characterisation of specific interactions between the bonded metal and the compound analysed. The results also enabled assessment of the influence of the structure of the compounds on their retention. The measurements were also carried out for the phases with free SH and CN groups as reference phases. The work demonstrates that the phases obtained may be useful for effective separations.

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Capillary complexation gas chromatography in analysis of halohydrocarbons

Cited by 10 publications

References 23 publications

Capillary complexation gas chromatography in analysis of cyclic and aromatic hydrocarbons

Capillary complexation gas chromatography in analysis of cyclic and aromatic hydrocarbons

Quantitative relationship and application of 3‐benzylketoimine metal dichlorides in the analysis of volatile hydrocarbons

Transition metal complex stationary phases for the CGC analysis of ethers, thioethers and ketones

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