Capillary gc is now rapidly expanding. Naturally, initiation is most often attempted on the basis of the experience acquired with packed columns. However, such an extrapolation is successful only if a number of essential peculiarities of capillary gc are considered. Based on practical examples this
Summaries
- Book ID
- 102345625
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 193 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0935-6304
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โฆ Synopsis
A detection system is described which is based on fluorescent ion-pair formation between tertiary amine drugs and dimethoxyanthracene sulphonate. A dynamic micro-extraction principle is then used to isolate the ion-pairs from the excess reagent. The band broadening of this extraction detector was kept below 20% using standard auto-analyser equipment. With the enhanced selectivity and sensitivity of this approach it was possible to analyse chloropheniramine in urine at ppb concentrations using a pre-column clean-up trace enrichment step.
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Chromatographic methods are presented for the determination of chloramphenicol, erythromycin, tyrothricin, nystatin, penicillin, streptomycin, sulphanilamides and nitrofurans, in some pharmaceutical formulations. The methods have been applied in routine analysis and are in general capable of disting
Head space GC using a special electropneumatic sampling system works well in combination with glass capillaries. Because a homogenous gas mixture is already present most problems inherent with inlet splitters are thus avoided. In cases where the high vapor pressure of the sample can cause problems w
Nickel capillary columns coated with moderately polar stationary phases such as Witconol can be used for the separation of the organic volatile fraction from biological fluids. A Jransevaporator" sampling technique for the collection of the organic volatiles on glass beads from as little as 5 to 500