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Split and splitless injection for quantitative gas chromatography : concepts, processes, practical guidelines, sources of error /
| Autor principal: | |
|---|---|
| Formato: | Libro |
| Lenguaje: | English |
| Publicado: |
Weinheim ; New York :
Wiley-VCH,
2001.
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| Edición: | 4th, completely rev. ed. |
| Colección: | Further publications for gas chromatographers
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| Materias: |
Tabla de Contenidos:
- A, Syringe injection into hot vaporizing chambers. Introduction
- Syringes
- Evaporation inside the needle
- How much is really injected?
- Syringe needle handling minimizing discrimination
- Dependence of discrimination on sample volume
- Solvent and solutes
- Injector temperature
- Plunger-in-needle syringes
- Possibilities of avoiding evaporation in the needle
- Summarizing guidelines
- B, Sample evaporation in the injector. Introduction
- Solvent evaporation--heat transfer
- Solvent evaporation--visual observation
- Solute evaporation
- Sample degradation in the injector
- Retention and adsorption in the vaporizing chamber
- Deactivation of liners and packing materials
- Cleaning of injector liners
- C, Split injection. Introduction
- The split ratio
- Sample concentrations suitable for split injection
- Initial band widths
- Split injection for fast analysis
- Analysis requiring maximum sensitivity
- High split ratios for reducing the sample size
- Problems concerning the split ratio
- Problems concerning linearity of splitting
- Techniques for improving quantitative analysis
- General evaluation of split injection
- D, Splitless injection. Introduction
- How to perform splitless injection
- Sample volumes suitable for splitless injection
- Injection of large volumes
- Sample transfer into the column
- Problems with quantitative analysis
- Reconcentration of initial bands
- Related injection methods
- General evaluation of splitless injection
- E, Injector design. Vaporizing chamber
- Surroundings of the vaporizing chamber
- Autosamplers
- The gas regulation systems.