| Autor: |
Schomburg, G., Dielmann, G. |
| Zdroj: |
Journal of Chromatographic Science; March 1973, Vol. 11 Issue: 3 p151-151, 1p |
| Abstrakt: |
Retention parameters, preferably Kovats indices, can be used to identify chromatographically separated components of mixtures, and in addition, chemical derivatives thereof. For reliable correlations of peaks, combined use of other mainly spectroscopic identification methods is necessary. There are two different methods of applying Kovats indices which are table matching and/or incremental predictions of I and ΔI values. Examples for the application of both methods are given. The derivation and the range of validity of retention increments is discussed in more detail. The extended use of retention parameters was limited until recently because of a lack in data reproducibility due to column polarity and apparatus parameters. Proposals are made as to how these difficulties may be overcome and as to the corrections and standardizations which may be made in order to obtain precise data. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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