A new reproducible solid-state metal-oxide pH sensor for beverage quality monitoring is developed and characterised. The working electrode of the developed pH sensor is based on the use of laser-etched sputter-deposited RuO₂ on Al₂O₃ substrate, modified with thin layers of sputter-deposited Ta₂O₅ and drop-cast Nafion for minimisation of redox interference. The reference electrode is manufactured by further modifying a working electrode with a porous polyvinyl butyral layer loaded with fumed SiO₂. The developed pH sensor shows excellent performance when applied to a selection of beverage samples, with a measured accuracy within 0.08 pH of a commercial glass pH sensor.

开发并表征了一种新型的可重现的固态金属氧化物pH传感器，用于饮料质量监控。研发的pH传感器的工作电极基于在Al ₂ O ₃衬底上使用激光蚀刻溅射沉积的RuO ₂，并用溅射沉积的Ta ₂ O ₅薄层和滴铸Nafion进行修饰，以最大程度地减少氧化还原干涉。参比电极是通过进一步修改工作电极，使工作电极具有负载有热解SiO ₂的多孔聚乙烯醇缩丁醛层。先进的pH传感器在应用于多种饮料样品时显示出卓越的性能，其测量精度在商用玻璃pH传感器的0.08 pH以内。