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International Scholarly Research Notices
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International Scholarly Research Notices
/
2015
/
Article
/
Tab 3
/
Research Article
Development of Simultaneous Derivative Spectrophotometric and HPLC Methods for Determination of 17-Beta-Estradiol and Drospirenone in Combined Dosage Form
Table 3
Recovery of ESR and DRS determined by the proposed methods (
).
Method
Concentration (
µ
g mL
−1
)
Recovery (%)
RSD (%)
Taken
Added
Found ± SD
Derivative spectrophotometric method
ESR
1
0.3
1.36 ± 0.07
104.62
5.44
1.5
2.59 ± 0.06
103.60
2.24
3
3.67 ± 0.06
91.75
1.72
DRS
2
0.3
2.30 ± 0.02
100.00
0.70
1.5
3.45 ± 0.16
98.57
4.55
3
4.82 ± 0.17
96.40
3.52
HPLC method
ESR
0.5
0.3
0.79 ± 0.06
98.75
7.72
1.5
1.99 ± 0.04
99.50
1.96
3
3.73 ± 0.05
106.57
1.23
DRS
1
0.2
1.12 ± 0.03
93.33
2.77
0.7
1.63 ± 0.03
95.88
1.96
1
1.93 ± 0.02
96.50
1.03
