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Electroanalytical Method for Determining Pyrogallol in Biodiesel in the Presence of a Surfactant
Author(s) -
Araujo Alessandra Silveira Antunes,
Caramit Ricardo Pini,
Oliveira Lincoln Carlos Silva,
Ferreira Valdir Souza
Publication year - 2015
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.201400647
Subject(s) - pyrogallol , pulmonary surfactant , bromide , chemistry , sodium dodecyl sulfate , chromatography , supporting electrolyte , electroanalytical method , electrolyte , detection limit , iodide , inorganic chemistry , nuclear chemistry , electrode , potentiometric titration , organic chemistry , biochemistry
A sensitive, straightforward electroanalytical method for determining pyrogallol (PY) in biodiesel in the presence of a surfactant was developed using a voltammetric technique and screen‐printed electrodes. The influence of surfactant addition (sodium dodecyl sulfate (SDS), Triton X‐100 (TX‐100), cetyltrimethylammonium bromide (CTAB), tetrabutylammonium iodide (TBAI), tetrabutylammonium bromide (TBAB), or tetraethylammonium bromide (TEAB)) on the supporting electrolyte (0.04 mol L −1 BrittonRobinson buffer) was evaluated. Only CTAB significantly increased the oxidation peak current. Under optimal conditions, the method demonstrated linearity over the concentration range of 0.8–9.0×10 −6 mol L −1 , with limits of detection and quantification of 4.9×10 −7 and 1.5×10 −6 mol L −1 , respectively. The results were satisfactory, relative to those obtained using high‐performance liquid chromatography (HPLC).