A Stability-Indicating HPLC-DAD Method for Determination of Ferulic Acid into Microparticles: Development, Validation, Forced Degradation, and
Encapsulation Efficiency
Table 5
Robustness data for ferulic acid analysis ().
Parameter
Drug content (%) ± SD
RSD
Retention time (min)
Flow rate (mL/min)
0.9
102.71 ± 1.93
1.88
5.39
1.0
100.12 ± 0.60
0.60
4.86
1.1
99.78 ± 0.57
0.57
4.49
pH of mobile phase
3.0
100.12 ± 0.60
0.60
4.86
4.0
97.56 ± 0.98
1.00
4.80
6.0
98.03 ± 0.37
0.38
4.52
Temperature (°C)
Ambient
100.12 ± 0.60
0.60
4.86
30
100.09 ± 1.09
1.09
4.71
40
99.14 ± 2.22
2.24
4.44
SD = standard deviation; RSD = relative standard deviation.