Table 4.

Determination of ibuprofen and phenylephrine in Grippostad® tablets and application of standard addition technique using the proposed method

	Grippostad® tablets	Standard addition technique
	Mean* ± SD	Taken (µg/mL)	Added (µg/mL)	Recovery%*
PHE	99.44 ± 1.38	0.5	0.25	99.20
			0.5	101.15
			1	98.90
		Meana ± SD		99.75 ± 1.22
IBU	99.78 ± 1.27	20	10	99.80
			20	99.82
			40	101.34
		Meana ± SD		100.32 ± 0.88

^*Average of three determinations