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J Bładek

Publications and source records attributed to J Bładek.

2 recordsLinked to original sources
PubMed1986

Overpressured thin-layer chromatography.

The properties, apparatus and applications of overpressured thin-layer chromatography (OPTLC) have been reviewed. In the Introduction planar chromatography has been briefly characterized, with particular attention to TLC. The general properties of OPTLC and methods of development of chromatograms in this technique have been then given. The construction of chambers and equipment for OPTLC has been described, paying attention to two-dimensional columns. The properties of chambers for OPTLC have been characterized considering the flow of eluent, sorbent-eluent interactions and the efficiency of various systems. OPTLC, TLC and HPTLC have been compared and also a comparison between OPTLC with a constant (linear) eluent flow-rate and with a decreasing eluent flow-rate has been made. Analytical applications of OPTLC have been described and examples of separations of mixtures have been given.

Chromatography, Thin Layer↗
PubMedDate not supplied

Analysis of the possible use of liquid crystals in fingerprinting.

Preliminary results concerning the use of liquid crystals (LC) in fingerprinting are given. These were based on thin layers of liquid crystals, changing colours (observed in linear polarized light) due to dissolved organic matter, transferred from fingers' surfaces. The possibility is shown of using LC to illustrate not only the surface but also the spacial configuration of a fingerprint. Relations are given between the amount of organic matter generating a fingerprint on a given surface and the coloured "response" of LC which may be used for identification as well as approximate estimation of the process of ageing.

Crystallization↗