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  • 1 University of Zagreb Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology Marulićev trg 20 HR-10000 Zagreb Croatia
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Two-dimensional thin-layer chromatography (2D TLC) has been used as a screening method for detection of the metal ions Al 3+ , Cr 3+ , Cu 2+ , Ni 2+ , Mg 2+ , Zn 2+ , Mn 2+ , Pb 2+ , Sn(IV), and Fe 3+ in honey. Different mobile phases and visualization reagents were tested. The best separation was achieved on precoated microcrystalline cellulose TLC plates with acetonitrile-HCl-water, 73 + 15 + 12 ( v/v ), as mobile phase in the direction x , and 2-pentanol-acetonitrile-HCl, 30 + 20 + 50 ( v/v ), in the direction y . A mixture of quercetin, dimethylglyoxime, and NH 3 was used for visualization of the chromatographic spots. This reagent mixture produced intensely colored spots for all the ions tested and enabled their identification at concentrations ranging from 50 to 1000 ng per spot.The method was used to identify metal ions in honey samples, dissolved in 2 mol L −1 hydrochloric acid, after microwave digestion. Seven metal ions, Al 3+ , Cr 3+ , Fe 3+ , Mn 2+ , Pb 2+ , Ni 2+ and Sn(IV), were identified.

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Journal of Planar Chromatography - Modern TLC
Language English
Size A4
Year of
Foundation
1988
Volumes
per Year
1
Issues
per Year
6
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
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Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
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Chief Executive Officer, Akadémiai Kiadó
ISSN 0933-4173 (Print)
ISSN 1789-0993 (Online)

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