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DOI: 10.5445/KSP/1362004
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Assessment of an ultramicroelectrode array (UMEA) sensor for the determination of trace concentrations of heavy metals in water [online]

Xie, Xudong

Abstract:
The main objectives of this book are (i) to investigate the electrochemical behavior and the analytical performance of a novel ultramicroelectrode array (UMEA); (ii) to assess the analytical parameters of square-wave anodic stripping voltammetric measurements (SWASV) using the UMEA; and (iii) to estimate the potential of the UMEA in developing decentralised analytical equipments for the determination of trace concentrations of heavy metals in natural waters.
Surface analytical techniques (SEM, ESEM, and AFM) showed that the UMEA chips are of high quality in manufacture. Cyclic voltammetric and chronoamperometric experiments proved that the electrochemical behavior of the UMEA is dominated by the features characteristic for single microelectrodes.
Chronocoulometry was found to be the most suitable method in generating the Hg-film of good quality. A new UMEA chip could be plated at least ten times, corresponding to about 500 measurements of trace metals in synthetic aqueous solutions. Using SWASV, detection limits of <0.1 ï¿g/l could be achieved for the metals (Pb, Cd). Precision and accuracy were found to be approx +/-10% of RS ... mehr


Zugehörige Institution(en) am KIT Institut für Mineralogie und Geochemie (IMG)
Publikationstyp Hochschulschrift
Jahr 2004
Sprache Englisch
Identifikator ISBN: 3-937300-48-1
ISSN: 1618-2677
URN: urn:nbn:de:0072-AAA13620048
KITopen-ID: 1362004
Verlag Universitätsverlag Karlsruhe, Karlsruhe
Umfang X, 133 S.
Serie Karlsruher Mineralogische und Geochemische Hefte ; 26
Abschlussart Dissertation
Fakultät Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Institut Institut für Mineralogie und Geochemie (IMG)
Prüfungsdaten 02.06.2004
Schlagworte Sensor , Chemischer Sensor , Elektrochemischer Sensor , Mikroelektrode , Schwermetall , Geochemie
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