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Is it possible to use the DPPH and ABTS methods for reliable estimation of antioxidant power of colored compounds?

having spectra in Vis region. DPPH method; ABTS method; Coloured antioxidants; IC50 determination - Małgorzata Olszowy and Andrzej L. Dawidowicz contributed equally to this work. Introduction

Possibility of quinine transformation in food products: LC–MS and NMR techniques in analysis of quinine derivatives

Faculty of Chemistry, Maria Curie Sklodowska University , Gliniana 33, 20-614 Lublin , Poland 1 Andrzej L. Dawidowicz Quinine is an alkaloid consisting of two major systems: quinoline and quinuclidine. It

Determining the true content of quercetin and its derivatives in plants employing SSDM and LC–MS analysis

Reliable plant analysis is a challenging task due to the physical character and chemical complexity of plant matrices. First of all, it requires the application of a proper sample preparation procedure to fully isolate the analyzed substances from the plant matrix. The high-temperature liquid–solid extraction is commonly applied for this purpose. In the light of recently published ...

Does the Plant Matrix Type Have Impact on Rutin Transformation During Its Extraction?

Curie Sklodowska University , Pl. Maria Curie Sklodowska 3, 20-031 Lublin , Poland 1 Andrzej L. Dawidowicz Rutin is a flavonoid glycoside found in many plants. It is used as medication and an ingredient ... investigating plant metabolism and looking for new plant components. Compliance with Ethical Standards Conflict of Interest Andrzej L. Dawidowicz declares that he has no conflict of interest. Katarzyna Bernacik

Rutin Transformation During Its Analysis Involving Extraction Process for Sample Preparation

Sklodowska University , Pl. Maria Curie Sklodowska 3, 20-031 Lublin , Poland 1 Andrzej L. Dawidowicz Rutin (quercetin-3-O-rutinoside) is one of the most popular phenolic compounds found in various plant ... looking for new plant components. Compliance with Ethics Requirements Conflict of Interest Andrzej L. Dawidowicz declares that he has no conflict of interest. Katarzyna Bernacik declares that she has no

The importance of solvent type in estimating antioxidant properties of phenolic compounds by ABTS assay

Andrzej L. Dawidowicz 0 Magorzata Olszowy 0 0 A. L. Dawidowicz (&) M. Olszowy Faculty of Chemistry, Maria Curie Sklodowska University , Pl. Marii Curie Sklodowskiej 3, 20-031 Lublin, Poland ABTS

Simple and rapid determination of myristicin in human serum

Andrzej L. Dawidowicz 0 Michal P. Dybowski 0 0 A. L. Dawidowicz (&) M. P. Dybowski Faculty of Chemistry, Maria Curie Sklodowska University , Pl. Marii Curie Sklodowskiej 3, 20-031 Lublin, Poland

The influence of pH on the thermal stability of 5-O-caffeoylquinic acids in aqueous solutions

Andrzej L. Dawidowicz 0 Rafal Typek 0 0 A. L. Dawidowicz (&) R. Typek Faculty of Chemistry, Maria Curie Sklodowska University , Pl. Marii Curie Sklodowskiej 3, 20-031 Lublin, Poland Chlorogenic

Antioxidant properties of BHT estimated by ABTS assay in systems differing in pH or metal ion or water concentration

Andrzej L. Dawidowicz 0 Magorzata Olszowy 0 0 A. L. Dawidowicz (&) M. Olszowy Faculty of Chemistry, Maria Curie Sklodowska University , Pl. Marii Curie Sklodowskiej 3, 20-031 Lublin, Poland