J. Planar Chromatogr. 3, 280-282 (1990). TLC of Re, Mo, V, W on Polichrom A (a copolymer of mixed 1,4- and 1,5-di(methacryloyloxymethyl)naphthalene and styrene with starch, dextrin of a polyvinyl alcohol containing 10-14% acetate groups as binder), with 0.5 hydrochloric acid - ethanol 9:1 as mobile phase. Detection by spraying first with a saturated solution of tin chloride in conc. HCl and second with a saturated aqueous solution of ammonium rhodanide.

Anal. Chem. 64, 3176-3179 (1992). Description of a square-wave anodic stripping voltametric method for ppm determination of heavy metals. Separation by TLC on carboxymethyl cellulose using a cellulose dialysis membrane - covered mercury film electrode placed directly on the TLC plate surface in a thin-film of supporting electrolyte solution. Presentation of the results for a mixture of Pb(II), Cd(II), and Zn(II). Calibration curves for Pb(II).

J. Planar Chromatogr. 8, 232-234 (1995). HPTLC of copper and cobalt dioximato complexes on silica with benzene - 2-propanol - ethyl acetate 60:38:2 for a-furildioxime complexes, with benzene - 2-propanol - ethyl acetate 80:15:5 for dimethylglyoxime complexes, with benzene - 2-propanol - ether 6:1:3 for a-benzildioxime complexes. Quantification by densitometry at 254 nm.

J. Planar Chromatogr. 9, 445 - 449 1996). TLC of some rare-earth benzoates (La, Ce, Nd, Sm, Dy, and Yb) on single, mixed and impregnated layers using 125 (!) solvent systems. All the benzoates show no mobility when chromatographed on alumina and developed with either pure single solvents or with two-component non-acidic solvent systems. On cellulose, however, all benzoates move with the solvent front, giving tailed spots. Some mutual separations of benzoates were realized on silica and mixed absorbent layers developed with some organic and nonacidic solvent systems. The best separation conditions were obtained with non-impregnated silica - alumina 9:1 with 0.5 M NH3.

J. Planar Chromatogr. 12, 440-445 (1999). TLC of 20 metal ions on starch, alumina, starch-alumina 1:1, starch - talc 1:1, silica gel - talc 1:1 and alumina - talc 1:1 with oxalic acid, tartaric acid, citric acid, and succinic acid, 0.1 M each, as mobile phase. Admixture of talc with starch proved very useful in effecting a number of analytically important metal-ion separations.

J. Planar Chromatogr. 17, 250-254 (2004). TLC of three series of beta - diketonato complexes of the type [M(acac)3-n(phacphac)n], [M(acac)3-n(phacphSac)n], and [M(acac)3-n(phSacphSac)n] (where M represents cobalt(III), chromium(III), or ruthenium(III), acac is the 2,4-pentanedionato ion, phacphac is the 1,3-diphenyl-1,3-propanedionato ion, phacphSac is 3-mercapto-1,3-diphenyl-prop-2-en-1-one, phSacphSac is the 3-mercapto-1,3-diphenyl-prop-2-en-1-thion ion, and n = 0-3) on silica gel with five mono-component (chloroform, toluene, dichloromethane, xylene, tetrahydronaphthalene) and five two-component eluents (n-amyl acetate - carbon tetrachloride 1:1, n-butyl acetate - carbon tetrachloride 2:3, chloroform - carbon tetrachloride 1:1 and 3:7, and dichloromethane - carbon tetrachloride 4:1. Separations were performed in a horizontal chamber after equilibration for 30 min. After development the colored spots were readily visible.

J. Planar Chromatogr. 23, 343-347 (2010). TLC and HPTLC of (derivatized) sulfide ions on silica gel with dichloromethane - methanol - diethyl ether - 25 % ammonia 40:5:5:1 in a horizontal chamber saturated for 20 min. Detection by using the methylene blue method, i.e. production of methylene blue by oxidative coupling of sulfide with N,N-dimethyl-p-phenylenediamine in the presence of iron(III) ions in acidic medium. Quantitative determination by absorbance measurement at 660 nm (method I), or analysis by TLSee software (method II). Response for both was a linear function in the concentration range of 20-100 pmol/zone. The LOD and LOQ were 10 pmol/zone (3.2 mg/L) and 20 pmol/zone (6.4 mg/L). The repeatability of both methods (%RSD) was 1.9-4.2 % for method I and 1.5-3.9 % for method II.

J. Planar Chromatogr. 13, 12-15 (2000). Examination of the retention behavior of iodide, iodate and periodate on silica gel, cellulose, alumina and kieselguhr with mixtures of 0.1 M NH3 and acetone as mobile phase. Alumina and 0.1 M NH3 - acetone 9:1 was best because it furnished more compact and well-resolved spots of the anions.