Table 2.

Determination of dexamethasone in ear-eye drop (0.1%) and injection solution (8 mg/amp) using the developed procedure.

Sample	Founda	RSD (%)	Labeled	Statistical t testb	Pharmaceutical company/batch number
Ear-eye drop
1	0.99 ± 0.001	1.01	0.1%	1.73	Daru Pakhsh-Iran/514
2	0.101 ± 0.001	0.99	0.1%	1.72	Daru Pakhsh-Iran/519
Injection solution
1	7.92 ± 0.80	1.00	8	1.74	Daru Pakhsh-Iran/352
2	8.04 ± 0.79	0.98	8	0.88	Daru Pakhsh-Iran/309

^aMean ± standard deviation (n = 3).

^bTabulated t-value for two degrees of freedom at P(0.95) is 4.30.