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Simultaneous Voltammetric Determination of Benzene, Toluene and Xylenes (BTX) in Water Using a Cathodically Pre‐treated Boron‐doped Diamond Electrode
Author(s) -
Garcia de Freitas Junior Geraldo,
Florêncio Tayla M.,
Mendonça Ricardo J.,
SalazarBanda Giancarlo R.,
Oliveira Robson T. S.
Publication year - 2019
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800661
Subject(s) - toluene , benzene , chemistry , electrode , electrochemistry , supporting electrolyte , detection limit , ternary operation , voltammetry , inorganic chemistry , chromatography , organic chemistry , computer science , programming language
An electrochemical method for the simultaneous determination of benzene, toluene and xylenes (BTX) in water was developed using square‐wave voltammetry (SWV). The determination of BTX was carried out using a cathodically pre‐treated boron‐doped diamond electrode (BDD) using 0.1 mol L −1 H 2 SO 4 as supporting electrolyte. In the SWV measurements using the BDD, the oxidation peak potentials of the total xylenes‐toluene and toluene‐benzene couples, present in ternary mixtures, display separations of about 100 and 200 mV, respectively. The attained detection limits for the simultaneous determination of benzene, toluene and total xylenes were 3.0×10 −7 , 8.0×10 −7 and 9.1×10 −7 mol L −1 , respectively. The recovery values taken in ternary mixtures of benzene, toluene and total xylenes in aqueous solutions are 98.9 %, 99.2 % and 99.4 %, respectively.