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Glossary |
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| Term | Definition | Article | Siehe auch |
|---|---|---|---|
| thermal conductivity detector: Wikipedia: thermal conductivity detector |
Relatively unspecific detector for gas chromatography. | ||
| thermochemistry: Wikipedia: thermochemistry |
A special subject of general thermodynamics that deals with the interaction of heat with chemical processes. | ||
| thin layer chromatography: Wikipedia: thin layer chromatography |
In thin layer chromatography (TLC) organic solvent mixtures or buffers are used as mobile phases. The stationary phase is a thin layer of Al2O3 or SiO2 on glass, plastics or aluminum plates. | ||
| threshold limit value: Wikipedia: threshold limit value |
The airborne concentration of a chemical to which it is believed that healthy working adults may be exposed safely through a 40 h working week and a full working life. Measued as time-weighted average. In Germany as "MAK". | permissible air concentration | |
| toxicity equivalence factor: | The toxicity equivalence factor (TEF) is used to compare the toxicity of different chemical substances which share a common mechanism of action. Primarily they are used for e.g. dioxins, where they are based on the specific ability to elicit dioxin-like effects. TEFs are only valid for specific organisms, enzymes and effects. I-TEF = International toxicity equivalence factor |
dioxins |