Development and Validation of an HPLC Method for Simultaneous Assay of Potassium Guaiacolsulfonate and Sodium Benzoate in Pediatric Oral Powder

Table 5

Results of accuracy.

Spiked level (%)	Replicate number	Potassium guaiacolsulfonate				Sodium benzoate
		Spiked amount of standard (mg)	Sum of peaks’ area	Recovery (%)	Mean recovery, RSD (%)	Spiked amount of standard (mg)	Peak area	Recovery (%)	Mean recovery, RSD (%)
80	1	23.0	1988231	102.0	101.9	38.4	1532007	101.2	101.8
	2	20.6	1776475	101.7		38.6	1552884	102.0
	3	20.5	1777035	101.9	0.1	38.6	1552844	102.0	0.5
100	1	25.3	2159862	100.7	100.3	48.0	1918840	101.4	101.7
	2	25.2	2199415	100.5		48.2	1934702	101.8
	3	25.4	2199538	99.8	0.5	48.2	1935383	101.9	0.3
120	1	30.6	2648436	100.7	100.7	57.0	2260622	100.6	101.0
	2	30.9	2635143	100.6		57.2	2283777	101.3
	3	30.8	2634916	100.9	0.2	57.3	2284080	101.1	0.4