Thin-Layer Chromatography of Metal Cations Modified with Amines and Surfactants and the Sorption-Catalytic Detection of Cobalt(II) and Copper(II)

JPC – Journal of Planar Chromatography – Modern TLC - The thin-layer chromatography (TLC) procedures of metal cations, modified with amines and cationic surfactant micelles, followed by...     

The Effect of the Substituents of β-Ketoiminato Ligand of Copper(II) and Nickel(II) Complexes on their Retention on Thin Layers of Polyacrylonitrile

JPC – Journal of Planar Chromatography – Modern TLC - The effect of substituents of the β-ketoiminato ligand of 24 cop-per(H) and nickel(H) complexes on hRF values obtained by TLC...     

Use of Complexation TLC to Investigate Selected Monosulfides. Part I. Silica Impregnated with Cu(II), Co(II), Ni(II), Mn(II), Al(III), Cr(III), and Fe(III) Cations as Stationary Phase

JPC – Journal of Planar Chromatography – Modern TLC - This paper focuses on the use of complexation liquid chromatography (in its TLC mode) to investigate eleven monosulfides. In the...     

Application of High-Performance Thin-Layer Chromatography for Screening and Simultaneous Determination of Some Angiotensin II Receptor Antagonists in Dosage Forms and Plasma

JPC – Journal of Planar Chromatography – Modern TLC - A high-performance thin-layer chromatographic (HPTLC) method was performed for simultaneous quantification of four angiotensin II...     

Effect of Temperature on the RF of Porphine and its Metal Complexes in Normal and Reversed-Phase TLC

JPC – Journal of Planar Chromatography – Modern TLC - Porphine and its complexes with Cu(II), Ni(II), and Zn(II) have been separated by adsorption and partition TLC. In adsorption TLC...     

Soil Thin-Layer Chromatography of Heavy Metal Cations with Surfactant-Modified Mobile Phases: Mutual Separation of Zinc(II), Cadmium(II), and Mercury(II)

JPC – Journal of Planar Chromatography – Modern TLC - Thin-layer chromatography of ten metal ions has been performed on pure soil layers; the mobile phases were aqueous organic and...     

Effect of Impregnation Conditions on the Structure and Chromatographic Behavior of TLC Adsorbents Modified with Cu(II) and Ni(II) Salts

JPC – Journal of Planar Chromatography – Modern TLC - Attempts have been made to find the optimum conditions for modification of silica gel and amino- and cyanopropyl-bonded silica with...     

Cation thin-layer chromatography in mixed organic solvents containing s-butylamine: Separation of Zn(II) from Cd(II) and Cu(II)

Summary A TLC method has been developed for the separation of Zn(II) from Cd(II) and Cu(II) on silica gel alyers with mixed organic solvents containing s-butylamine. The separation of Zn(II) from Cd(II) in the presence of certain anions and at various pH values of sample solution was examined. A mixture containign s-butylamine, acetone and formic acid in 262 was found to be the best solvent.     

Determination of Fe(II) and Zn(II) in Vitrum Prenatal by Ion Chromatography (IC). Comparison with Classical and Derivative Spectrophotometry (D0, D1, and D2) with Metrian,Metriap, Metriarez-γ, and Metidarez-β Dyes and with Atomic Absorption Spectrometry

JPC – Journal of Planar Chromatography – Modern TLC - 3-Mercapto-5-(2′-hydroxynaphthylazo-1′)-1,2,4-triazole (metrian);...     

Correlation of Retention Data of Pesticides in Normal- and Reversed-Phase Systems and Utilization of the Data for Separation of a Mixture of Ten Urea Herbicides by Two-Dimensional Thin-Layer Chromatography on Cyanopropyl-Bonded Polar Stationary Phase and on a Two-Adsorbent-Layer Multi-K SC5 Plate

JPC – Journal of Planar Chromatography – Modern TLC - The selectivities of TLC systems have been compared by use of correlations between RF(II) and RF(I) values (by analogy with...     

A comparative study of HPLC and TLC separation of amino acids using Cu(II) ion

Separation of amino acids using Cu(II) by RP-HPLC and impregnated TLC is reported. For HPLC the sample mixture of amino acids containing copper (II) was injected into the column while for TLC the silica gel plates were impregnated with Cu(II). The mobile phase used in HPLC was acetate buffer (0.3 M , pH 6.0)-acetonitrile (9:1, v/v), and that in TLC was acetate buffer (0.3 M , pH 6.0):acetonitrile-n-butanol (12:5:10, by vol.). The results have been compared and discussed.     

MBAMT,a new locating and chelating agen in TLC and ring colorimetric determination of Cu(II), Co(II), Ni(II), Pd(II), Pt(IV), and Rh(III)

Summary Synthesis of MBAMT (3-methyl-4-benzylideneamino-5-mercapto-1,2,4-triazole) and its IR and NMR spectral data are reported. The high stability of the characteristically coloured chelates with Cu(II), Co(II), Ni(II), Pd(II), Pt(IV) and Rh(III) has been made the basis for their efficient ascending TLC separations on silica gel G layers, when present together. Results of four different solvent systems are included to assess efficient resolution of the chelates along with their limits of identification and separation. TLC separations, followed by the ring colorimetric determination of the six metal ions (as ternary mixtures) are tabulated.MBAMT=3-methyl-4-benzylideneamino-5-mercapto-1,2,4-triazole.     

Simultaneous Quantification of Picrosides I and II from Picrorhiza kurroa,Picrolax Capsules,and Picrolax Suspension: High-Performance Thin-Layer Chromatographic-Densitometric Method Developed with Kutkin

JPC – Journal of Planar Chromatography – Modern TLC - Kutkin, a mixture of two iridoid glycosides, viz., picrosides I and II, is a major active constituent of Picrorhiza kurroa (family:...     

Thin-Layer Chromatography of Quinolones in Ion-Association Systems with Di(2-Ethylhexyl)Orthophosphoric Acid (HDEHP)

JPC – Journal of Planar Chromatography – Modern TLC - Quinolones, because of their hydrophilic (amphiionic) character, are strongly adsorbed by silica even from polar solvents. It has...     

Separation of Metalloporphyrins by TLC

JPC – Journal of Planar Chromatography – Modern TLC - Complexes of hydroxy- and alkyloxytetraphenylporphyrins with Cu (II), Zn (II), and Ni (II) have been prepared and their...     

Spectrophotometric and TLC Detection Reagent for the Insecticides Dichlorvos (DDVP) and Diptrex (Trichlorfon), and their Metabolites,in Biological Tissues

JPC – Journal of Planar Chromatography – Modern TLC - A new reagent has been developed for spectrophotometric quantification and thin-layer chromatographic (TLC) detection of the...     

Comparison of Different PLS Algorithms for Simultaneous Determination of Cd(II), Cu(II), Pb(II), and Zn(II) by Anodic Stripping Voltammetry at Bismuth Film Electrode

In this work we evaluated the use of different variable selection techniques combined with partial least‐squares regression (PLS) – genetic algorithm PLS (GA‐PLS), interval PLS (iPLS), and synergy interval PLS (siPLS) – in the simultaneous determination of Cd(II), Cu(II), Pb(II) and Zn(II) by anodic stripping voltammetry at a bismuth film. Generally, variable selection provided an improvement in prediction results when compared to full‐voltammogram PLS. The use of interval selection based algorithms have shown to be most adequate than the selection of discrete variables by GA. Excellent analytical performances were obtained despite the inherent complexity of the simultaneous determination.     

Thin-Layer Chromatography of Anions — Separation of Coexisting Hexacyanoferrate(II), Hexacyanoferrate(III) and Thiocyanate with a New Mobile Phase

JPC – Journal of Planar Chromatography – Modern TLC - The thin-layer chromatography of eighteen anions has been performed on silica layers with mixed aqueous–organic mobile...     

Phenolic Compounds in the Flowers of Lavatera trimestris L. (Malvaceae)

JPC – Journal of Planar Chromatography – Modern TLC - Plants of the Malvaceae family are very rich in phenolic compounds. TLC, 2D TLC, and RP HPLC have been used for qualitative...     

HPTLC Method for Analysis of Withaferin-A in Ashwagandha (Withania somnifera)

JPC – Journal of Planar Chromatography – Modern TLC - A densitometric high-performance thin layer chromatographic (HPTLC) method has been established for analysis of withaferin-A in...