Design of Optical Sensor Membrane Based on Polymer Poly(methyl methacrylate) for Paracetamol Detection in Traditional Herbal Medicine

Table 7

The robustness test of optical sensor membrane.

Optical sensor membrane	Metampyrone		Acetosal		Ibuprofen
	Color change	Reaction time	Color change	Reaction time	Color change	Reaction time
PMMA-FeCl3; 7.5% 7:3	Brown	1”	Purple	1”	-	-
PMMA-Folin-Ciocalteu 5% 6:4	Dark blue	3’ 57”	-	-	-	-
PMMA-Nessler; 5% 6:4	-	-	-	-	-	-