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Table 4 Precision data of the proposed methods for the determination of ALD in pure form

From: Validated spectrophotometric methods for determination of Alendronate sodium in tablets through nucleophilic aromatic substitution reactions

Parameter Intra - day precision Inter - day precision
  Conc. taken (μg/ml) Conc. found (μg/ml) % Found Conc. taken (μg/ml) Conc. found (μg/ml) % Found
  5.00 4.927 98.50 5.00 4.948 98.96
Method I 10.00 9.958 99.58 10.00 9.999 99.99
  15.00 15.022 100.17 15.00 15.138 100.92
‾x ± SD    99.42 ± 0.85    99.96 ± 0.98
%RSD    0.85    0.98
%Er    0.49    0.57
  12.00 11.97 99.73 12.00 11.88 98.99
Method II 16.00 16.26 101.63 16.00 15.84 99.01
  20.00 20.42 102.13 20.00 19.96 99.81
‾x ± SD    101.16 ± 1.27    99.27 ± 0.47
%RSD    1.26    0.47
%Er    0.73    0.27
  3.00 2.978 99.28 3.00 2.957 98.55
Method III 15.00 14.928 99.52 15.00 14.987 99.91
  30.00 30.096 100.32 30.00 29.926 9975
‾x ± SD    99.71 ± 0.54    99.40 ± 0.74
%RSD    0.54    0.74
%Er    0.31    0.43