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Dorina Casoni Babes-Bolyai University, 11 Arany Janos Str., 400028 Cluj-Napoca, Romania

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Costel Sârbu Babes-Bolyai University, 11 Arany Janos Str., 400028 Cluj-Napoca, Romania

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A thin-layer chromatographic (TLC) procedure combined with digital image processing analysis was developed for quantitative time-monitoring of the radical- scavenging activity. Reaction of 2,2-diphenyl-1-picrylhydrazyl (DPPH•) with reference antioxidants and selected catecholamine compounds was monitored on RP-18 chromatographic plates using dot-blot technique and different concentrations of standards. Images of the chromatographic plate were recorded after background staining every 5 min for 1 h using a TLC scanner device. ImageDecipher TLC software program was used to convert image data into chromatograms, from which spot area as a function of reaction time was easily monitored for different amounts of antioxidant in all cases. For a comparative evaluation of radical-scavenging activity, all the time-acquired images were documented as a new red, green, and blue (RGB) image after conversion to different color values. Based on the chromatogram digitization results, TLC—time-monitored radical-scavenging profiles of the investigated compounds were obtained. By the developed methodology, different image processing and image analysis procedures were proposed and originally applied for the first time in TLC—time-monitoring of radical-scavenging activity evaluation.

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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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