METHOD AND APPARATUS FOR ELEMENTAL ANALYSIS

摘要

Electrochemical stripping analysis employs screen printed electrodes (10,12,14) including a working electrode (10) produced from a composition in which the conductive component is a noble metal (e.g. gold), preferably of particle size 2-4 m, and the vehicle is based on a polymeric resin (e.g. epoxy, polyvinyl, polyacrylic, polyester or polyurethane). The formulation is such that there is no need for potentially interfering metal species such as copper, lead and bismuth either in the free metallic state or in the form of oxides. Furthermore it is curable at a low temperature (below 200 ), allowing the use of plastic substrates.