Utility of Charge Transfer and Ion-Pair Complexation for Spectrophotometric Determination of Eletriptan Hydrobromide in Pure and Dosage Forms

Table 4

Application of the standard addition technique for the determination of ELT in Relpax tablets (40 mg ELT per tab) using the proposed methods.

	Quinz			ARS			Mo(V)-thiocyanate
	Taken; (μg mL^−1)	Added; (μg mL^−1)	Recovery* (%)	Taken; (μg mL^−1)	Added; (μg mL^−1)	Recovery* (%)	Taken; (μg mL^−1)	Added; (μg mL^−1)	Recovery*; (%)
	4.0	—	100.30	2.0	—	99.90	5.0	—	99.75
		2.0	100.40		2.0	99.10		5.0	100.45
		4.0	99.40		3.0	99.70		10	99.90
		8.0	98.70		4.0	100.70		15	100.20
		10	99.30		5.0	100.40		20	99.50
		12	99.60		6.0	99.40		25	99.30
Mean ± SD			99.62±0.643			99.87±0.602			99.91±0.652
𝑉			0.413			0.362			0.652
R.S.D %			0. 645			0.603			0.425
S.E			0.263			0.246			0.266

aAverage of six determinations.