Parameter Proposed method Official Method [1] % Founda 102.00 99.16 99.40 100.32 100.00 99.48 99.48 100.15 100.64   99.33   Mean ± S.D. 100.14 ± 1.04 99.78 ± 0.55 t 0.64 (2.31)b F 3.568 (9.013) aThe average of three separate determinations. bThe figures between parentheses are the tabulated values of t and F at P=0.05.

Table 8: Assay results for the determination of atenolol in pure form by the HPLC and official methods.