title: Downscaling a multicommuted flow injection analysis system for the photometric determination of iodate in table salt.
abstract: In this work a downscaled multicommuted flow injection analysis setup for photometric determination is described. The setup consists of a flow system module and a LED based photometer, with a total internal volume of about 170 microL. The system was tested by developing an analytical procedure for the photometric determination of iodate in table salt using N,N-diethyl-henylenediamine (DPD) as the chromogenic reagent. Accuracy was accessed by applying the paired t-test between results obtained using the proposed procedure and a reference method, and no significant difference at the 95% confidence level was observed. Other profitable features, such as a low reagent consumption of 7.3 microg DPD per determination; a linear response ranging from 0.1 up to 3.0 m IO(3)(-), a relative standard deviation of 0.9% (n=11) for samples containing 0.5 m IO(3)(-), a detection limit of 17 microg L(-1) IO(3)(-), a sampling throughput of 117 determination per hour, and a waste generation 600 microL per determination, were also achieved.
authors.affiliation: Universidade Federal do Recôncavo da Bahia, Centro de Ciências Exatas e Tecnológicas, Centro, Cruz das Almas, 44380-000, Bahia, Brazil.
authors.forename: Sivanildo S
authors.initials: SS
authors.lastname: Borges
authors.forename: Jailson de Souza
authors.initials: Jde S
authors.lastname: Peixoto
authors.forename: Mário A
authors.initials: MA
authors.lastname: Feres
authors.forename: Boaventura F
authors.initials: BF
authors.lastname: Reis