Sample No. PCR
(%Recovery)
PLS
(%Recovery)
Nifedipine Atenolol Nifedipine Atenolol
1 99.90 100.80 99.90 100.72
2 101.33 99.77 101.33 99.77
3 99.28 101.46 99.44 101.36
4 98.50 101.89 98.50 101.89
5 101.66 100.24 101.60 100.24
6 100.00 102.75 100.08 102.70
7 97.80 99.50 97.80 99.50
8 100.72 101.78 100.72 101.78
Mean 99.89 101.02 99.92 100.99
% RSD 1.34 1.35 1.32 1.10
Table 3: Percent recoveries of nifedipine and atenolol in the validation set by PCR and PLS regression models.