Amount taken
(µg mL-1)
Amount added
(µg mL-1)
Total amount found  (µg mL-1)
(Mean ± SD)
Recovery (%) RSD (%)
SAX 25.00 25.00 50.75 ± 0.19 101.84 0.62
50.00 75.56 ± 1.41 99.85 2.03
75.00 99.56 ± 0.94 100.11 1.17
MET 0.00 12.50 12.75 ± 0.89 101.02 2.51
25.00 24.56 ± 0.70 99.27 1.55
37.50 37.06 ± 0.94 99.56 1.54
Table 5: Results of recovery studies by standard addition method