Title :
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
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;
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
DOI :
10.1109/SENSOR.2007.4300411
