Table 6: Results of recovery study by standard addition method.

Tablets studiedMethod AMethod BMethod C
STS in
tablets
mg mL−1
Pure STS
added
mg mL−1
Total found
mg mL−1
Pure STS recovered* 
Percent ± SD
STS in
tablets
µg mL−1
Pure STS
added µg mL−1
Total found
µg mL−1
Pure STS recovered* 
Percent ± SD
STS in
tablets
µg mL−1
Pure STS
added µg mL−1
Total found
µg mL−1
Pure STS recovered* 
Percent ± SD

Suminat-252.981.54.47 4.572.256.87 1.020.51.51
2.983.06.02 4.574.509.15 1.021.02.04
2.984.57.60 4.576.7511.4 1.021.52.54

Suminat-503.031.54.56 4.552.256.78 0.990.51.50
3.033.06.00 4.554.509.15 0.991.02.00
3.034.57.60 4.556.7511.5 0.991.52.52

Mean value of three determinations.