title: On-line preconcentration system for bismuth determination in urine by flow injection hydride generation inductively coupled plasma atomic emission spectrometry.
abstract: An on-line bismuth preconcentration and determination system implemented with hydride generation inductively coupled plasma atomic emission spectrometry (HG-ICP-AES) associated to flow injection (FI) was studied. Quinolin-8-ol and Amberlite XAD-7 were used for the retention of bismuth, at pH 4.5. The bismuth complex was removed from the micro-column with nitric acid. The detection limit value for the preconcentration of 100 ml of aqueous solution was 0.02 ng ml(-1) with a relative standard deviation (R.S.D.) of 3.5%, calculated from the peak heights obtained. The calibration graph using the preconcentration system for bismuth was linear with a correlation coefficient of 0.999 at levels near the detection limits up to at least 100 ng ml(-1). The method was successfully applied to the determination of bismuth in human urine samples.
authors.affiliation: Area de Qui&#x0301;mica Anali&#x0301;tica, Facultad de Qui&#x0301;mica, Bioqui&#x0301;mica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera-5700 San Luis, Argentina.
authors.forename: S
authors.initials: S
authors.lastname: Moyano
authors.forename: R G
authors.initials: RG
authors.lastname: Wuilloud
authors.forename: R A
authors.initials: RA
authors.lastname: Olsina
authors.forename: J A
authors.initials: JA
authors.lastname: Gásquez
authors.forename: L D
authors.initials: LD
authors.lastname: Martinez