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Proceedings Paper

Determination of total metal pollutants in water with optical detection
Author(s): Michal Chudy; Piotr Prokaryn; Artur Dybko; Wojciech Wroblewski; Zbigniew Brzozka
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Paper Abstract

The total concentration of heavy metal ions was measured with the use of a highly sensitive reagent (4-(2-pyridylzo)-resorcinol (PAR)). Because of PAR chelates are slightly soluble in water and their forming is not selective, the analytical procedure for Cd, Cu, Hg, Pb, Zn determination was developed to perform the analysis in an aqueous environment without the need of inconvenient and time-consuming extraction. A proposed analysis method is more useful in comparison with classical FIA analysis what is crucial during fast classification of various natural water samples. To minimize the chemicals consumption such a classification can be performed in a specially designed microsystem. The Y- shape microchannel structure with a mixing area was made by fine engraving in PMMA plate and sealed with the PDMS one. The M2+-PAR complex forming conditions were determined for each of the chosen metal ions. The solubility of formed complexes was better when a micellar environment was created by the addition of a non-ionic surfactant (Triton X100). Next the synthetic mixtures of Cd, Cu, Hg, Pb, Zn ions were prepared to obtain total molar metal ions concentration in the range from 10-6 to 10-4 M and measured after on-chip reaction. A tap water and HAC-sample (Highest Allowable Concentration, ΣMe=1,2•10-5 M) were also measured. The detection was performed in a special flow cuvette and spectra measurements were carried out using diode array spectrophotometer and CCD detector.

Paper Details

Date Published: 22 September 2003
PDF: 6 pages
Proc. SPIE 5124, Optoelectronic and Electronic Sensors V, (22 September 2003); doi: 10.1117/12.517117
Show Author Affiliations
Michal Chudy, Warsaw Univ. of Technology (Poland)
Piotr Prokaryn, Warsaw Univ. of Technology (Poland)
Artur Dybko, Warsaw Univ. of Technology (Poland)
Wojciech Wroblewski, Warsaw Univ. of Technology (Poland)
Zbigniew Brzozka, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 5124:
Optoelectronic and Electronic Sensors V
Wlodzimierz Kalita, Editor(s)

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