The detection of formaldehyde in textiles using interdigitated microelectrode array diffusion layer titration with electrogenerated hypobromite.
An interdigitated microelectrode array (IDA) was applied to the determination of formaldehyde released from textiles produced in industry. The proposed method is based on formaldehyde reaction with hypobromite which is formed in weakly basic media by control current electrooxidation of bromide on the generator segment of the IDA array. The unreacted hypobromite diffuses through the gap between individually polarisable IDA segments and it is amperometrically detected on the collector segment of the IDA. The efficiency of this nonconvective transfer process in the absence of formaldehyde was substantially higher (78%) in comparison with that when using the rotating ring disc electrode. The influence of the added formaldehyde on the transfer process can be utilised to develop a simple and sensitive analytical procedure for formaldehyde detection with a detection limit of 4 x 10(-6) mol dm(-3).
Tomcík
Peter
P
Department of Analytical Chemistry, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovak Republic. tomcik@cvt.stuba.sk
Jencusová
Pavlína
P
Krajcíková
Monika
M
Bustin
Dusan
D
Brescher
Roman
R
D017605:Bromine Compounds / Q000737:chemistry*; D004058:Diffusion; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005557:Formaldehyde / Q000032:analysis* / Q000737:chemistry*; D008839:Microelectrodes; D013784:Textiles / Q000032:analysis*; D017186:Titrimetry
D017605:Bromine Compounds; D005557:Formaldehyde