A Solid Binding Matrix/Mimic Receptor-Based Sensor System for Trace Level Determination of Iron Using Potential Measurements

Table 3

Analytical features of the present method reported in the literature.

Technique/method	Principle of the method	Detection limit (mg/L)	Linear Range (mg/L)	Repeatability (%)	Application	Sample preparation	Ref.
UV/Vis	Iron complex with 1-nitroso-2-naphhtol (446 nm)	1.7  × 10^−3	1.7×10^−3–0.12	2.57	Industrial waste water	(SPE)	[2]
	Catalytic spectrophotometric flow injection (514 nm)	20 × 10^−3	Up to 2×10^−6		Real water samples	Filtered water samples were acidified to 0.1 M hydrochloric acid)	[3]
	Adaptation of the ferrozine method (560 nm)	5850	1755 to 23400	2	In situ analysis	No	[7]
	Reaction betwen hydroquinone and chromate in acidic media (350 nm)	0.05	—	—	—	No	[8]
Chemiluminescence	Neutralisation reaction	0.56	2.8–560	—	Fresh water samples	Reduction of iron(III) with	[13]
	—	5.85 × 10^−5	14625 to 87750	—	Fresh water samples	Hydroxylammonium chloride	[14]
HPLC	Photometric detection (550 nm)	0.2  × 10^−3	10×10^−3 to 10	—	Spiked tap water	No	[55]
Potentiometry/ISE	Chiral 2,6-bis-(carboxamide methyl ester)pyridine derivative sensor, PVC membrane		0.25–56.0	—	Drug formulations	—	[56]
	IIP sensor in a PVC selective membrane	4.45	0.014	2.4	Pharmaceutical formulation samples	No	This method