Preparation, evaluation, and comparison of wide bore (320 μm) and narrow bore (50 μm) cyanosilicone‐coated capillary columns for gas chromatography

Due to their high polarity and unique selectivity, cyanopropyl silicones are basic stationary phases for high resolution capillary gas chromatography. Different OH-terminated cyanopropyl silicones, containing a high cyanopropyl content, were synthesized and chromatographically evaluated. Special attention was paid to the degree of immobilization of the phases in FSOT columns. Depending on the problem at hand, a choice has to be made between immobilization and maximum selectivity.

Section: Chromatographic Evaluationsupporting

confidence: 81%

“…A similar effect was noted by Aerts eta/. [29]. On a 6OYO cyanopropyl phase 20:O eluted before 18:3, but after immobilization with ATB, the elution sequence wasaltered.…”

Section: Chromatographic Evaluationsupporting

confidence: 81%

OH‐terminated cyanopropyl silicones

David

Sandra

Diricks

1988

“…This test mixture has earlierbeen usedforcolumn evaluation in ourlaboratory [31,32]. The concentrations were ca.…”

Section: Test Mixturesmentioning

confidence: 99%

Siloxane/silarylene copolymers as stationary phases for capillary gas chromatography part I: Evaluation of silanol terminated dimethyl substituted polymers

Bemgård

Blomberg

Lymann

et al. 1987

Self Cite

SummaryThe thermal stability of silicones can be improved on replacement of certain of the oxygen atoms in the polymer backbone by phenyl groups. Such a polymer has been synthesized and evaluated foruseasstationaryphaseinfusedsilica capillarygas chromatography; the polymer was dimethyl substituted and silanol terminated. A selectivity was provided by the phenyl groups in the backbone. For comparative purposes, a silanolterminated dimethylpolysiloxane has also been evaluated. Both stationary phases gave columns of highest separation efficiency and the supporting fused silica surface was deactivated bythestationary phaseson thermal treatment. Further, low column bleeding was observed at the maximum temperature tested, 370OC. The phenyl-containing phase could be immobilized to 60% by heat treatment, but the pure dimethylpolysiloxane was 10% immobilized.Theinfluenceon immobilizationoffactors such as nature of the supporting surface, stationary phase silanol content, reaction temperature and atmosphere in the column during reaction has been studied.

High speed capillary GC on 10 m × 100 μm i.d. FSOT Columns

Proot

Sandra

1986

SummaryThe chromatographic performance of 10 m X 100 pm i.d. capillary columns, coated with different stationary phases, was studied. TZ-6 plots were measured at different temperature program rates. The polarity and selectivity are strongly influenced by the temperature program rate. The analysis time depends on the capacity ratio and the selectivity factor; stationary phase selection thus is an important aspect in high speed capillary GC. A number of applications is presented and the applicability of split injection is discussed.