Analysis of Heavy Metal Ions in Real Samples using a Concentrator Device with a Super-Hydrophobic Surface

Author

Yanagimachi, Isao ; Nashida, Norihiro ; Iwasa, Koichiro ; Suzuki, Hiroaki

Author_Institution

Univ. of Tsukuba, Tsukuba

fYear

2007

fDate

10-14 June 2007

Firstpage

1425

Lastpage

1428

Abstract

Heavy metal ions in soil samples were analyzed by a novel method based on evaporative concentration. The detector chip had a microelectrode array as a working electrode and a Ag/AgCl reference electrode surrounded by a super-hydrophobic layer formed with polytetrafluoroethylene (PTFE) beads. A sample droplet formed on the electrode area was shrunk to concentrate the solution. Cd²⁺ , Pb²⁺ , and As³⁺ ions were analyzed by square wave anodic stripping voltammetry. By combining a protective layer and wet sample digestion, the heavy metal ions in soil samples could be analyzed. Correlation coefficients between the values obtained by this method and those by a conventional method was 0.982 (Pb²⁺), 0.969 (Cd²⁺), and 0.936 (As³⁺).

Keywords

arsenic; cadmium; chemical variables measurement; electrochemical electrodes; ions; lead; microelectrodes; polymers; silver compounds; soil pollution; voltammetry (chemical analysis); Ag-AgCl; Ag-AgCl reference electrode; As³⁺; Cd²⁺; Pb²⁺; concentrator device; correlation coefficients; detector chip; environmental pollution; evaporative concentration method; heavy metal ions analysis; microelectrode array; polytetrafluoroethylene beads; soil samples; square wave anodic stripping voltammetry; super-hydrophobic surface; wet sample digestion; Atomic measurements; Chemical analysis; Detectors; Electrodes; Laboratories; Microelectrodes; Protection; Sensor arrays; Soil; Surface contamination; Concentration; Evaporation; Heavy metal analysis; Super-hydrophobic surface;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems Conference, 2007. TRANSDUCERS 2007. International

Conference_Location

Lyon

Print_ISBN

1-4244-0842-3

Electronic_ISBN

1-4244-0842-3

Type

conf

DOI

10.1109/SENSOR.2007.4300411

Filename

4300411