High temperature silylation of glass capillary columns

Abstract

SummaryThis paper describes the results of a study on the deactivation of the surface of glass capillary columns by high temperature silylation (HTS).The different steps, leaching, washing, dehydration and HTS were optimized. A practical procedure yielding a high percentage of very good columns is given. The influence of leaching and HTS on the temperature stability and coating efficiency of capillary columns coated with OV-1 was studied. The inertness of the glass surface after HTS is demonstrated by several examples.

Gas chromatographic-mass spectrometric analysis of volatile compounds in oak wood used for ageing of wines and spirits

“…Although SDE is a well-established method for extraction of the volatile components of plants [13], it has not, to the best of our knowledge, previously been used for analysis of wood volatiles. Figures lc and ld show the TIC profiles of SDE pentane and dichloromethane fractions; 43 components were tentatively identified in these extracts.…”

“…A microscale simultaneous distillation-extraction apparatus (Chrompack, Middelburg, The Netherlands) [13] was used as previously described [14,15]. Ground wood (10 g) was extracted using the two possible configurations, pentane and dichloromethane being the solvents.…”

Fatty acid chain length combinations in ascitic fluid triglycerides containing lymphatic absorbed medium‐chain fatty acids

“…Triglyceride carbon number composition was determined by capillary gas chromatography (GC). An aliquot of the triglyceride solution was introduced (6) on a 15 rn/0.3 mm HTS-OV-1 capillary column (7) programmed from 230 C to 350 C (3 C/min).…”

In situ cross‐linking of the stationary phase in capillary columns. Part 1: Introduction and preparation of apolar columns

“…[1,2,3] andofBlornbergetal. [4,5,6,7,8] forsometime.Wefind the results encouraging but are disappointed by the drop in efficiency to a value which is only around 2/3 that of a HTSOV-1 column [9,10]. Inertness isalso poorerthanforaHTS-OV-1 column and, furthermore, we find that reproducible preparation of the prepolymers is not easy, especially when trifunctional monomers are involved.…”