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New chemical sensor for detergents determination

机译:用于洗涤剂的新化学传感器

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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 SiO_2/electrolyte interface. Adsorption of detergents on the sensor surface affects the charge distribution in the electrical double layer that is registered as a change in the surface conductance. The sensor may be used to measure a detergent residues starting from 5 ppm even in solutions with high electrolyte conductivity.
机译:提出了一种基于与在二氧化硅中形成的微小毛细管底部的电极位的相互指向电极阵列的新阻抗传感器。 微孔在顶部打开,使得与电解质溶液接触,交流电流从一个电极靠近毛细血管壁的表面流到另一个电极,并且通过SiO_2 /电解质界面的表面电导变化显着影响。 清洁剂在传感器表面上的吸附影响了被登记为表面电导变化的电双层中的电荷分布。 即使在具有高电解质导电性的溶液中,传感器也可用于测量从5ppm开始的洗涤剂残留物。

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