Selectivity in electrochemical detection: Phase-inversion membrane electrode modifications and photoelectrochemical sensing with microelectrodes.

摘要

In the application of electroanalytical chemistry to biosensors and bioanalysis, adsorbates with molecular weights greater than 5000 daltons interfere. To minimize, or prevent, the adsorption of such species, size-exclusion membranes were investigated. Phase-inversion membranes were cast directly onto a 25 ;Novel solvent systems (solvent(nonsolvent): pyridine(2-octanol), pyridine(cyclohexanol), THF(toluene), THF(aqueous Mg(ClO;A novel microprobe was constructed using a gold-coated optical fiber polished to a flat surface. The gold forms a microring electrode surrounding the fiber. The probe's analytical utility is demonstrated with electrogenerated chemiluminescence (ECL) and photoelectrochemistry. Detection limits with ECL, using Ru(bpy)