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Thin-layer chromatography with high-boiling mobile phase. part 2: Effect of temperature on retention characteristics in TLC with high-boiling mobile phases

✍ Scribed by Berezkin, V. G. ;Bolotov, S. L.

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
477 KB
Volume
6
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

A study has been undertaken on the effect of temperature on retention characteristics in thin‐layer chromatography (TLC) with low‐volatility mobile phases (MP). It is shown that temperature variations in TLC in melts bring about variations in both the relative retention values and, in some cases, in the order of migration of the chromatographic zones across the layer. The variation in the capacity factor k' with temperature agrees well with Martin's equation. To explain the temperature dependence of R~f~ one must, in general, take into account the variations with temperature in both the partition coefficient and the phase ratio. To describe the variation in R~f~ with temperature in TLC with low‐volatile MP one can use an approximate equation in which In R~f~ is a linear function of 1/T. The experiments indicate that temperature is a major factor in TLC in melts.

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