title: Development of a compact system for the determination of lead using a liquid core waveguide and a blue diode as a light source.
abstract: A simple and compact system was developed for the on-site analysis of lead in environmental water samples. The system consisted of a custom-made blue diode as a light source, a liquid core waveguide (LCW) as spectrophotometric cell and a compact UV-visible spectrometer. It weighed within 1.5 kg in total. Lead was detected using a spectrophotometric indicator reagent (TPPS: 5,10,15,20-tetraphenyl-21H,23H-porphinetetrasulfonic acid, disulfuric acid, tetrahydrate) after masking interfering ions by coprecipitation with magnesium hydroxide. With an increase in the length of the LCW cell, the detection limit of lead was almost linearly enhanced, and the linear calibration range was shifted to a lower concentration range. The detection limit of lead by using 100 cm of a LCW cell was 2 nmol dm(-3). The observed value (9.6 +/- 0.4 microg dm(-3)) of lead in a river-water reference material (JSAC 0302-3) with this system was in good agreement with the certified value (9.9 +/- 0.2 microg dm(-3)).
authors.affiliation: Department of Chemical Science and Technology, Institute of Science and Technology, The University of Tokushima, 2-1 Minamijosanjima, Tokushima 770-8506, Japan. yabutani@chem.tokushima-u.ac.jp
authors.forename: Tomoki
authors.initials: T
authors.lastname: Yabutani
authors.forename: Honami
authors.initials: H
authors.lastname: Kurokawa
authors.forename: Yuka
authors.initials: Y
authors.lastname: Hayashi
authors.forename: Hiromichi
authors.initials: H
authors.lastname: Higuchi
authors.forename: Yuki
authors.initials: Y
authors.lastname: Iwata
authors.forename: Yuya
authors.initials: Y
authors.lastname: Hashizume
authors.forename: Shuji
authors.initials: S
authors.lastname: Wada
authors.forename: Yukako
authors.initials: Y
authors.lastname: Hayashi
authors.forename: Junko
authors.initials: J
authors.lastname: Motonaka
mesh_terms: D003116:Color; D004566:Electrodes; D007854:Lead / Q000032:analysis*; D008027:Light; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation* / Q000379:methods*; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D007854:Lead