Spectrophotometric Determination of Zolmitriptan in Bulk Drug and Pharmaceuticals Using Vanillin as a Reagent

Table 2

Evaluation of intraday and interday precision and accuracy.

ZMT taken (μg mL^−1)	Intraday (𝑛=7)			Interday (𝑛=5)
	ZMT found^a (μg mL^−1)	%RSD^b	%RE^c	ZMT found^a (μg mL^−1)	%RSD^b	%RE^c
20.0	19.70	1.45	1.49	19.68	1.66	1.61
40.0	40.71	0.83	1.78	40.73	0.89	1.84
60.0	60.61	1.22	1.02	60.72	1.55	1.21

^aMean value of five determinations; ^brelative standard deviation (%); ^crelative error (%).