Table 1.

The results of FA analysis of commercial preparations using the Pt-2-modified electrode chemosensor compared with chemical and enzymatic methods.

Product	FA Concentration Determined by Various Methods, M
	Biosensor	Chemical (Spectrophotometric)			Declared by Producer	Chemosensor
	FdDH-Based [25]	Chromotropic [10]	MBTH [10,11]	Purpald [12]	-	Current Study
“Formalin”	13.5 ± 2.1	14.0 ± 2.4	12.6 ± 2.1	12.9 ± 1.9	13.0 ± 1.5	13.6 ± 1.8
“Sanodez Forte”	3.2 ± 0.6	3.6 ± 0.9	3.6 ± 0.8	3.3 ± 0.5	2.6 ± 0.5	2.7 ± 0.48