Author:
Tomasz Tuzimski Medical University in Lublin Department of Physical Chemistry, Chair of Chemistry, Faculty of Pharmacy with Medical Analytics Division 4A Chodźki Street 20-093 Lublin Poland

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The purpose of the present work is to demonstrate an application of high-performance thin-layer chromatography-diode array scanning densitometry (HPTLC-DAD) after solid-phase extraction (SPE) for the identification and quantitative analysis of azo dyes in samples of drinks and drops. To prepare the samples for SPE, diethylamine was added to a final concentration of 0.025 M. For analysis of dyes, the samples were applied to Bakerbond Octadecyl C18 SPE columns. After being loaded with the samples, the C18 SPE columns were eluted with different volumes and concentrations of mixtures (ν/ν) of methanol-acetate buffer, pH 3.5. The procedure described for the determination of compounds is inexpensive and can be applied to routine analysis of analytes in water-soluble samples of drinks and drops after preliminary cleanup, concentration, and fractionation by SPE. Limits of detection and limits of quatitation values were satisfactory, in the range 31.5–119.4 and 95.3–361.8 ng per zone, respectively, for all determined dyes.

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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
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0933-4173 (Print)
ISSN 1789-0993 (Online)

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