Table 3.

Comparison of metformin HCl quantification results achieved by traditional HPLC and SBWC.

Method	Amount of API Used (mg)	Amount of API Found (mg)	%Recovery	%RSD a
Traditional HPLC	57.4	57.1	99.6	0.3
SBWC (95 °C)	54.2	53.5	98.8	0.4

^a Based on three replicate measurements.