Journal ArticleDOI
Chemometric characterization of the R F values of pesticides in thin-layer chromatography on silica with mobile phases comprising a weakly polar diluent and a polar modifier. Part IV
TLDR
In this article, plots of R F against modifier concentration, Cmod, are reported for chromatography of thirty-one moderately polar pesticides in systems of the type silica-heptane + modifier (ethyl acetate, tetrahydrofuran, and dioxane).Abstract:
Summary In addition to the fifty pesticides investigated in the first three parts of this study, in this paper plots of R F against modifier concentration, Cmod, are reported for chromatography of thirty-one moderately polar pesticides in systems of the type silica–heptane + modifier (ethyl acetate, tetrahydrofuran, and dioxane).read more
Citations
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Application of different modes of thin-layer chromatography and mass spectrometry for the separation and detection of large and small biomolecules
TL;DR: The state of the art on thin-layer chromatography and mass spectrometry for qualitative analysis of biomolecules can be found in this article, where the reader can find useful information for application of these techniques for separation, detection, and qualitative investigation of proteins, peptides, oligonucleotides, amino acids, DNA, RNA, and lipids.
Application of different modes of thin-layer chromatography and mass spectrometry for the separation and detection of large and small biomolecules
TL;DR: The reader will find useful information for application of these techniques for separation, detection, and qualitative investigation of structures and quantitative determination of biomolecules such as proteins, peptides, oligonucleotides, amino acids, DNA, RNA, and lipids.
Journal ArticleDOI
Two-Dimensional TLC with Adsorbent Gradients of the Type Silica-Octadecyl Silica and Silica-Cyanopropyl for Separation of Mixtures of Pesticides
TL;DR: In this article, two mixtures of pesticides have been separated by two-dimensional thin-layer chromatography with adsorbent gradients of the type silica-wettable with water octadecyl silica or silica−cyanopropyl.
Journal ArticleDOI
A new procedure for separation of complex mixtures of pesticides by multidimensional planar chromatography.
TL;DR: A new procedure for the separation of complex mixtures of pesticides by a combination of different modes of multidimensional planar chromatography on silica gel plates is reported.
Journal ArticleDOI
Separation of a mixture of eighteen pesticides by two-dimensional thin-layer chromatography on a cyanopropyl-bonded polar stationary phase
TL;DR: In this paper, a mixture of 18 pesticides was separated by thin-layer chromatography on a moderate polarity CN-modified silica gel and the greatest spread of points was obtained by combining nonaqueous normal-phase mobile phases (tetrahydrofuran or ethyl acetate in n -heptane) and aqueous reversed phases (a polar solvent (methanol or acetonitrile) in water), both on thin layers of cyanopropyl-bonded polar adsorbent.
References
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Journal ArticleDOI
Planar chromatography A retrospective view for the third millennium: by Sz Nyiredy, Ed. Springer Scientific Publishers, Budapest 2001, pp. 614 ISBN 963-699-157-X, Price: EUR 160,-
Journal ArticleDOI
Correlation of retention parameters of pesticides in normal- and reversed-phase systems and their utilization for the separation of a mixture of 14 triazines and urea herbicides by means of two-dimensional thin-layer chromatography.
TL;DR: The selectivities of TLC systems were compared by use of correlations between RF(II) and RF(I) (by analogy with two-dimensional TLC) and the greatest spread of points, indicative of individual selectivity, was obtained for nonaqueous mobile phases on silica and aqueousMobile phases on octadecyl silica adsorbent wettable with water.
Journal ArticleDOI
Use of a database of plots of pesticide retention (RF) against mobile-phase composition. Part II. TLC as a pilot technique for transferring retention data to HPLC, and use of the data for preliminary fractionation of a mixture of pesticides by micropreparative column chromatography
TL;DR: In this article, the relationship between RF values and mobile phase composition of moderately polar pesticides in normal-phase systems (NP) and reversed phase systems (RP) of the type octadecyl silica-water-polar modifier (acetonitrile, methanol, or tetrahydrofuran).
Related Papers (5)
Correlation of retention parameters of pesticides in normal- and reversed-phase systems and their utilization for the separation of a mixture of 14 triazines and urea herbicides by means of two-dimensional thin-layer chromatography.
Use of a database of plots of pesticide retention (R F) against mobile-phase composition.Part I. Correlation of pesticide retention data in normal- and reversed-phase systems and their use to separate a mixture of ten pesticides by 2D TLC
Correlation of Retention Parameters of Pesti- cides in Normal and RP Systems and their Utilization for the Separation of a Mixture of Ten Urea Herbicides and Fungicides by Two-Dimensional TLC on Cyanopropyl- Bonded Polar Stationary Phase and Two-Adsorbent-Layer Multi-K Plate
Tomasz Tuzimski,A. Bartosiewicz +1 more