Fabrication of an ISFET Sensor for the Detection of Sodium Ions in Body Plasma

Abstract:

Sodium chloride, commonly known as table salt, is widely used as essential seasoning in food, snacks and deserts worldwide. However, excessive consumption of table salt is a major cause of various health issues, involving high blood pressure, liver cirrhosis, kidney disease, and heart failure. This research aims at creating a portable, low-powered, efficient sensor for detection of sodium ions in body plasma for medical diagnosis purpose. The device was fabricated on a platform of Ion-Sensitive Field-Effect Transistor (ISFET) modified with sodium ionophore (sodium recognizing element), entrapped in polyurethane thin film. Our preliminary studies show that sodium ionophore-modified ISFET sensor yields good sensing performances, having a maximum sensitivity of 43 mV/pNa, and a detection limit of 2.3 millimol/liter.

• Periodical: Key Engineering Materials (Volume 824)
• Pages: 190-196
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.824.190
• Online since: October 2019
• Authors: Krittin Yanwittayakul, Tararat Khaokhiew, Woraphan Chaisriratanakul, Win Bunjongpru, Sira Srinives*
• Keywords: Blood Test, Ion Sensitive Field Effect Transistor, ISFET, Sodium Ionophore, Sodium Sensor

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