Naslov
Selective Determination of Chromium(III)and Chromium(VI) by Ion Exchange TLC

Autori
Bokić, Ljerka ; Stefanović, Branka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
New Achievements in Chromatography Book of Abstract / Šegudović, Nikola - Opatija : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 1996

Skup
New Achievements in Chromatography

Mjesto i datum
Opatija, Hrvatska, 08.10.1996. - 10.10.1996

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
chromium(III); chromium(VI); Ion Exchange TLC

Sažetak
Chromium is commonly used in hexavalent and trivalent forms. Continuous use of chromium salts in a great number of industries has caused its dispersion in aqutic and soil environments. The EC Directive for drinking water states that total Cr should not exceed 0.5 mg/L. Hexsavalent species are more toxic and carcinogenic than trivalent and it is necessary to separate and determine the concentration of each ion. In this work a TLC method with speciation capability for chromium has been studied. Reagents for visualization Cr(III) and Cr(VI) have been tested (diphenylcarbazide, alizarin, alizarin S, quinalizarin, alizarin delphinol, dithizone, PAN (1-(pyridyazo)-2-naphtol) and PMAP (2-(2pyridylmethylenamono)-phenol). Improvement in the selectivity of TLC was achieved by changing the chromatographic properties of the support by physical modification. The sorbents tested use microcrystalline cellulose mixed with different ratios of solid anion exchanger Amberlite IRA-400 (10%, 20%, 30%). A number of solvent systems, solutions of organic and inorganic acids with ligands which form complexes with Cr(III) and Cr(VI) have been tested.

Izvorni jezik
Engleski

Znanstvena područja
Tekstilna tehnologija

POVEZANOST RADA