A first reactant is immobilized i.e. in a porous matrix (50), adjacent a sample electrode (46) within a reaction chamber. Energizing of the electrode (46) electrophoretically attracts a mobile second reactant and/or electrolytically induces appropriate reaction conditions to enhance reaction...http://www.google.com.au/patents/US5853668?utm_source=gb-gplus-sharePatent US5853668 - Apparatus allowing sequential chemical reactions
