Click on “Download PDF” for the PDF version or on the title for the HTML version.
If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.
Screen-printed potentiometric strip for calcium ion determination in water and milk
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2012 Dallas, Texas, July 29 - August 1, 2012 121340856.(doi:10.13031/2013.41979)
Authors: Jianfeng Ping, Jian Wu, Yibin Ying
Keywords: Calcium ion, Water, Milk, Sensor
In this study, a novel type of calcium ion potentiometric strip was fabricated using the screen-printing technique. The commercial ink was firstly printed onto the ceramic substrate in order to construct the reference electrode and working electrode. Then graphene film was modified onto the surface of working electrode by using one-step electrodeposition. The calcium ion-selective membrane was coated on the surface of graphene film by the simple drop-casting technique. This disposable potentiometric strip exhibited a Nernstian slope (29.1 mV/decade), low detection limit (10-5.9 mol L-1), and short response time (less than 10 s). Furthermore, the response potential of the developed strip was insensitive to oxygen, redox species, and light. The use of the disposable potentiometric strip for water and milk samples analysis obtained satisfactory results, which made it as a promising alternative in routine sensing applications.(Download PDF) (Export to EndNotes)