Coated copper Wire Calcium Selective Microelectrode for Applications in Dental Medicine

Abstract

A coated wire calcium selective microelectrode for biological use was developed, comprising a PVC selective matrix containing calcium ionophore IV coated on copper wire, previously covered with a solid-state contact mixture. The obtained calcium microsensor presented a Nernstian answer in a concentration range of 10-1 to 10-6 mol/L. The selectivity coefficients over the main interfering ions of biological interest proved that the calcium microelectrode is highly selective. Also, the response time (6s) and repeatability have been determined. The pH variation did not significantly modify the calcium microelectrode answer, being stable over the pH range (6.7-7.3) of interest. The obtained calcium microelectrode is simple, inexpensive and able to give reliable electrochemical response, recommending itself as a solution for assessing the level of inorganic ions of the gingival crevicular fluid and saliva.

Assessment of the Dynamic Parameters of an Ion-Selective Microsensor

“…The used electrochemical system consisted of a carbon paste solid-contact electrochemical calcium microsensor and a homemade solid-state Ag/AgCl as a micro-reference electrode [7]. The determinations were performed with the help of a multichannel MEDISEN type IEMS-4 potentiometric system, provided by Medisen Medikal Teknolojiler Araştırma Geliştirme San.…”

Development and comparison of various rod-shaped mini-reference electrode compositions based on Ag/AgCl for potentiometric applications

“…To compare the newly developed REs with commercial ones, we prepared and used four different ionselective electrodes (Li + , NH 4 + , Ca 2+ , and NO 3 − ISEs) in the same manner as our previous works. [29][30][31]…”

Internet of Things Implementation of Nitrate and Ammonium Sensors for Online Water Monitoring

“…As in our previous work, 26 we prepared solid-contact paste after dissolving 50% graphite oxide, 35% epoxy, and 15% hardener in a few drops of THF. Then, the paste was filled into polypropylene tubes (2.5 mm inner diameter, 3.5 mm outer diameter, 50.0 mm length) and attached to a copper wire from one end for establishing a signal connection.…”