Hollow-fibre Based Microextraction and Voltammetric Determination of Vanillylmandelic Acid

0487242 - ÚFCH JH 2019 RIV CZ eng C - Conference Paper (international conference)
Hrdlička, Vojtěch - Barek, J. - Navrátil, Tomáš
Hollow-fibre Based Microextraction and Voltammetric Determination of Vanillylmandelic Acid.
XXXVII. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference. Ústí nad Labem: Best servis, 2017 - (Navrátil, T.; Fojta, M.; Schwarzová, K.), s. 66-70. ISBN 978-80-905221-5-2.
[Moderní elektrochemické metody /37./. Jetřichovice (CZ), 15.05.2017-19.05.2017]
R&D Projects: GA ČR GA17-03868S
Institutional support: RVO:61388955
Keywords : Hollow-fibres * Liquid phase microextraction * Voltammetry
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

New method of liquid/liquid/liquid hollow fibre based microextraction of vanillylmandelic acid coupled with voltammetric determination is being developed. Selected liquid membranes based on alcohols, aliphatic hydrocarbons and esters were tested. Highest enrichment factor of 2.52 after 30 minutes of extraction was obtained using propyl benzoate, RSD = 18.2 % (n=5). Mechanically and cathodically pretreated (-1000 mV vs. Ag/AgCl/3M KCl, 15 s) boron doped diamond electrode in a miniaturized arrangement was used for DPV determination. LOD = 1.2 micromol/l, RSD = 5.9% (n=10) for a 10 microl extract.
Permanent Link: http://hdl.handle.net/11104/0284894