Smartphone based optical biosensor for the detection of urea in saliva

• Published in: Sensors and actuators. B, Chemical Vol. 269; pp. 346 - 353
• Main Authors: Soni, Anuradha, Surana, Rajat Kumar, Jha, Sandeep Kumar
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.09.2018; Elsevier Science Ltd
• Subjects: Biosensors; Body fluids; Calibration; Color; Filter paper; Non-invasive biosensor; Optical biosensor; Pixels; Response time; Saliva; Salivary urea; Smartphone based biosensor; Smartphones; Urea; Salivary urea; Non-invasive biosensor; Smartphone based biosensor; Optical biosensor

•We developed a noninvasive smartphone based biosensor for urea using saliva as sample, which is first such report.•The sensor was fabricated by co-immobilization of urease & pH indicator on filter paper strip which changed color with reaction to salivary urea.•This color change can be used to d...