A facile nano-iron oxide sensor for the electrochemical detection of the anti-diabetic drug linagliptin in the presence of glucose and metformin

Bulletin of the National Research Centre

Table 1 Comparison of the proposed method with other methods

Method	Linear range (μg/ml)	Solvent	LOD (μg/ml)	Recovery	Reference
Spectrophotometric	8–32	H₂O	0.247	100.39%	(Shehata et al. 2016)
HPLC	0.125–4	Methanol	0.03	11.07%	(Shen et al. 2009)
Spectrophotometric	2–12	Methanol		99.86%	(Vassilyev et al. 1985)
RP-HPLC	10–50	Methanol and phosphate buffer	1.65	99.79%	(Vemula et al. 2015)
CPE/Fe₂O₃NPs	0.03–86	Universal buffer	0.008	100.1%	Proposed method