Smartphone-based portable biosensing system using impedance measurement with printed electrodes for 2,4,6-trinitrotoluene (TNT) detection.Rapid, sensitive, selective and portable detection of 2,4,6-trinitrotoluene (TNT) is in high demand for public safety and environmental monitoring.  In this study, we reported a smartphone-based system using impedance monitoring for TNT detection.  The responses could be monitored by a hand-held device and send out to smartphone through Bluetooth.  Then, the smartphone was used to display TNT responses in real time and report concentration finally.  Thus, the smartphone-based biosensing platform provided a convenient and efficient approach to design portable instruments for chemical detections such as TNT recognition.
smartphone
The responses could be monitored by a hand-held device and send out to smartphone through Bluetooth. 
Bluetooth