0000000000059831

AUTHOR

P. Heizmann

showing 2 related works from this author

Analytische Anwendung der Di-thiobenzhydrazone von 1,2-Diketonen

1972

Die Anwendung der Di-thiobenzhydrazone von 1,2-Dicarbonylverbindungen zur Extraktion und zur spektralphotometrischen Bestimmung von Metallionen wurde untersucht. Danach bilden die 1,2-Bisthiobenzhydrazone farbige, in organische Losungsmittel extrahierbare Chelate (ɛM=3000–14000) mit Pb(II), mit Elementen der 1., 2. und 8. Nebengruppe, vereinzelt mit In(III), haufiger mit Sb(III) und mit Bi(III). Die Chelatbitdung von Diacetyl-bis-thiobenzhydrazon und von 2,3-Pentandion-bis-thiobenzhydrazon-p-methoxy mit Cu(II), Zn(II), Cd(II), Hg(II) und Pb(II) wurde als Beispiel naher untersucht.

ChemistryClinical BiochemistryGeneral Materials ScienceGeneral MedicineBiochemistryAnalytical ChemistryNuclear chemistryFresenius' Zeitschrift f�r Analytische Chemie
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Chromatography of metal chelates

1973

The chromatographic behavior of metal bis(ethoxyethyl)dithiocarbamate was investigated. The chelates of 14 elements (V, Cr, Co, Ni, Cu, Zn, Se, Mo, Cd, Te, Hg, Tl, Pb and Bi) could be preconcentrated from water with an on-line system and were shown to be suitable for C18-reversed-phase liquid chromatography. A quaternary solvent mixture with admixture of a surfactant was used as eluent, UV-detection was performed at 254 nm. Thermostating the column to 40° C resulted in a significant increase in chromatographic resolution and in a decrease of analysis time. The recovery of the chelates from the aqueous solutions as well as reproducibility of the results are very sensitive to pH changes.

chemistry.chemical_classificationAqueous solutionChromatographyResolution (mass spectrometry)Clinical BiochemistryGeneral MedicineBiochemistryAnalytical ChemistryMetalSolventColumn chromatographychemistryPulmonary surfactantvisual_artvisual_art.visual_art_mediumGeneral Materials ScienceChelationDithiocarbamateFresenius' Zeitschrift f�r Analytische Chemie
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