Vojtech Hrbek

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Vojtech Hrbek is a research assistant in the Department of Food Analysis and Nutrition, UCT Prague. His main research interests (but not limited to) are the application of (high resolution) mass spectrometry in the analysis of bioactive compounds and contaminants in food.

Articles

High performance liquid chromatography (HPLC) is a technique in analytical chemistry used to separate, identify, and quantify each component in a mixture | Image Credit: © Love Employee - stock.adobe.com

Application of Liquid- and Supercritical Fluid Chromatography Coupled with High-Resolution Mass Spectrometry for the Analysis of Short-, Medium-, and Long-Chain Chlorinated Paraffins in Dietary Supplements

Jakub Tomasko;David Maxa;Klara Navratilova;Tomas Kourimsky;Vojtech Hrbek;Jana Hajslova;Jana Pulkrabova

October 1st 2023

Scientists used supercritical fluid chromatography (SFC) and ultrahigh-pressure liquid chromatography (UHPLC)—both coupled with high-resolution mass spectrometry (HRMS)—to analyze various types of chlorinated paraffins (CPs) in fish oil-based dietary supplements.

Application of Liquid- and SFC Coupled with HRMS for the Analysis of Short-, Medium-, and Long-Chain Chlorinated Paraffins in Dietary Supplements

Jakub Tomasko;David Maxa;Klara Navratilova;Tomas Kourimsky;Vojtech Hrbek;Jana Hajslova;Jana Pulkrabova

October 1st 2022

This article presents SFC and UHPLC—both coupled with HRMS—methods for the analysis of short-, medium-, and long-chain CPs in fish oil-based dietary supplements.

Application of Liquid- and Supercritical Fluid Chromatography Coupled with High-Resolution Mass Spectrometry for the Analysis of Short-, Medium-, and Long-Chain Chlorinated Paraffins in Dietary Supplements

Jakub Tomasko;David Maxa;Klara Navratilova;Tomas Kourimsky;Vojtech Hrbek;Jana Hajslova

July 1st 2022

In this study, SFC and UHPLC—both coupled with HRMS—methods for the analysis of short-, medium-, and long-chain CPs in fish oil-based dietary supplements were developed and validated at concentration levels of 0.6 and 3.0 µg/g lipid weight (lw).

Authentication of Panax Ginseng‑Based Herbal Teas Using “Chemical Markers” Strategy

Jana Kvirencova;Vojtech Hrbek;Monika Tomaniova;Jana Hajslova

July 1st 2022

This article describes the method development involved in the authentication of nutraceuticals, particularly those containing Panax ginseng, which is popular because of possible positive effects on human health.

Analysis of MCPD and Glycidyl Fatty Acid Esters in Refined Plant Oils by Supercritical Fluid Chromatography– High-Resolution Mass Spectrometry

Tomas Kourimsky;Vojtech Hrbek;Jana Hajslova;Martin Steidl

July 1st 2022

The aim of this study was to develop an efficient method to enable a rapid determination of nine 3-MCPDEs and seven GEs in vegetable oils within a single run employing supercritical fluid chromatography coupled to high-resolution tandem mass spectrometry (SFC–HRMS/MS).