A Mobile-Based High Sensitivity On-Field Organophosphorus Compounds Detecting System for IoT-Based Food Safety Tracking

Table 3

Comparison of the limit of detection of OP compounds.

Parameter	This work	[1] Sensors (2012)	[29] Sensors and Actuators (2015)
Detection method	Optical absorption; (@ 405 nm)	Optical absorption; (@ 400 nm)	Optical absorption; (@ 400 nm)
Key technologies	Mobile-based system with CMOS photodiode	PIN-FET	Spectrometer with CCD
LOD	0.4 × 10^−6mol/L	4 × 10^−6mol/L	0.199 × 10^−6mol/L