Stability-Indicating HPTLC-Densitometric Method for Estimation of Dorzolamide Hydrochloride in Eye Drops

Table 4

Stability of drugs in sample solutions^a.

Time of analysis (hrs)	SD of area	% RSD of area
6	102	1.30
12	381	0.91
18	91	0.33
24	62	1.75

^a(n = 6) Average of three concentrations (100, 300, and 500 ng/spot).