P1.9.20 New chemical sensor for detergents determination

Andrey^ Bratov, Natalia Abramova, Andrey Ipatov & Angel Merlos
A new impedimetric sensor based on an interdigitated electrode array with electrode digits located at the bottom of microcapillaries formed in silicon dioxide is proposed. Microcapillaries are opened at the top, so that in contact with an electrolyte solution the ac current flows close to the surface of the capillary wall from one electrode to another and is significantly affected by changes in surface conductance at the SiO2/electrolyte interface. Adsorption of detergents on the sensor...