Application of two charge transfer complex formation reactions for selective determination of metformin hydrochloride in pharmaceuticals and urine

Future Journal of Pharmaceutical Sciences

Table 5 Results of tablets (products X and Y) analysis by the PCA, DDQ and official methods and their statistical comparison

Product analyzed	Label claim, mg MFH/tablet	Found^a (percent of label claim ±SD)
Product analyzed	Label claim, mg MFH/tablet	Official method	PCA method	DDQ method
X	500	99.47 ± 1.01	100.21 ± 1.45	99.97 ± 1.79
			t = 0.95	t = 0.55
			F = 2.06	F = 3.14
Y	500	99.70 ± 1.56	99.51 ± 0.98	100.30 ± 1.17
			t = 0.23	t = 0.69
			F = 2.53	F = 1.78