Abstract
The matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF) and micellar electrokinetic chromatography (MEKC) methods were used to identify and quantify five tannins, (+)-catechin, (–)-epigallocatechin, (–)-epigallocatechin gallate, (–)-epicatechin gallate and (–)-epicatechin, from aqueous, ethanolic and acetonic extracts of Calendula officinalis, Hypericum, perforatum, Galium verum and Origanum vulgare. The MALDI-TOF technique was used for screening tannins monomers and oligomers in plant extracts. The sandwich method and matrix 2,5-dihydroxybenzoic acid with a concentration of 10 mg mL–1 in acetonitrile/ultrapure water/trifluoroacetic acid (20 : 80 : 0.1, vol.) were used. The electrophoretic method developed for the separation and quantification of 5 catechins in 15 min exhibited good efficiency and precision, low limits of detection (0.0032–0.0153 μg mL–1) and quantification (0.0096–0.0466 μg mL–1). The correlation coefficients (R2) exceeded 0.9986 and the recovery values ranged between 94.25 % and 102.50 %. The present work provides new information on some of the less studied compounds present in plants frequently used in traditional medicine.
Acknowledgements.
This work was supported by Partnership in priority areas-PN II programme, developed with the support of MEN-UEFISCDI project no. 202/2014 (NEW-BIOVECT) and NUCLEU-BIODIV-PN 09-360106/2009.
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© 2015 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Original Paper
- Prevention of degradation of γ-irradiated EPDM using phenolic antioxidants
- Original Paper
- Differentiation of black, green, herbal and fruit bagged teas based on multi-element analysis using inductively-coupled plasma atomic emission spectrometry
- Original Paper
- Reaction mechanisms of carbon dioxide methanation
- Review
- Power consumption and gas–liquid dispersion in turbulently agitated vessels with vertical dual-array tubular coil baffles
- Short Communication
- Tannins analysis from different medicinal plants extracts using MALDI-TOF and MEKC
- Original Paper
- Trihexyl(tetradecyl)phosphonium bromide as extractant for Rh(III), Ru(III) and Pt(IV) from chloride solutions‡
- Original Paper
- Synthesis of Fe3O4–Ag nanocomposites and their application to enzymeless hydrogen peroxide detection
- Original Paper
- Possibilities for removal of chlorinated dye Mordant Blue 9 from model waste water‡
- Review
- Preparation and properties of gelatin films incorporated with N-hydroxysuccinimide-activated end-bit binary acid
- Original Paper
- Synthesis and properties of novel reusable nano-ordered KIT-5-N-sulfamic acid as a heterogeneous catalyst for solvent-free synthesis of 2,4,5-triaryl-1 H-imidazoles
- Short Communication
- Prediction of power consumption in mechanically agitated gassed reactor in viscous batch‡
- Original Paper
- Hydrogel supported chiral imidazolidinone for organocatalytic enantioselective reduction of olefins in water
- Original Paper
- Continuous synthesis of N-ethylethylenediamine over supported Cu–Zn–La catalysts
- Preface
- Enzyme-assisted extraction of citrus essential oil
- Preface
- Experimental investigations of liquid flow in pipe with flat internal baffles