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A Prototype of Electrochemical Sensor for Measurements of Carbonyl Compounds in Air
Author(s) -
Gębicki Jacek
Publication year - 2011
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.201100164
Subject(s) - ionic liquid , electrolyte , electrode , electrochemical gas sensor , detection limit , platinum , polydimethylsiloxane , formaldehyde , cyclic voltammetry , materials science , electrochemistry , membrane , analytical chemistry (journal) , square wave , selectivity , supporting electrolyte , imide , inorganic chemistry , chemistry , chromatography , nanotechnology , organic chemistry , polymer chemistry , catalysis , voltage , biochemistry , physics , quantum mechanics
The paper presents the results of investigation on a prototype sensor for measurements of benzaldehyde and formaldehyde in air. Sensitivity, limit of quantification and coefficient of selectivity of the sensor have been determined as a function of membrane thickness and electrode type using square wave voltammetry (SWV) technique. The working and counter electrodes were made of platinum and gold. Ionic liquids 1‐hexyl, 3‐methylimidazolium bis(trifluoromethanesulfonyl)imide constituted an internal electrolyte. Polydimethylsiloxane (PDMS) membrane separated gaseous medium from the electrolyte.