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  • 1 Silesian University Institute of Chemistry, Department of Analytical Chemistry 9 Szkolna Street 40-006 Katowice Poland
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Tea is one of the most popular beverages in the world. The exact composition of tea depends on the manufacturing process. Our goal was to optimize the chromatographic conditions for separation of tea extract and to apply the optimized method for determination of gallic acid in oolong, black, and pu-erh tea. Chromatographic separation was performed on silica gel 60 F 254 TLC plates with chloroform-ethyl acetate-formic acid, 5 + 4 + 1 ( v/v ), as mobile phase. Densitometric measurement was performed in the ultraviolet region at λ = 280 nm. Quantification of gallic acid in pu-erh tea was also performed by a spectrophotometric method based on the coupled redox complexation reaction occurring in the system Fe(III)-gallic acid-2,2′-dipyridyl ( λmax = 522 nm).

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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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