Table 3 Freeze and thaw stability study
Added (µg/mL) | Found (µg/mL) | Recovery (%) | RSD (%) | RE (%) | |
|---|---|---|---|---|---|
1st cycle | 5.00 | 4.98 | 99.63 | 4.28 | 0.37 |
20.00 | 19.98 | 99.91 | 3.39 | 0.09 | |
40.00 | 41.03 | 102.58 | 3.26 | 2.58 | |
2nd cycle | 5.00 | 5.21 | 104.23 | 1.94 | 4.23 |
20.00 | 19.88 | 99.38 | 1.54 | 0.62 | |
40.00 | 39.34 | 98.36 | 1.49 | 1.64 | |
3rd cycle | 5.00 | 5.09 | 101.73 | 3.66 | 1.73 |
20.00 | 20.57 | 102.83 | 0.98 | 2.83 | |
40.00 | 38.89 | 97.23 | 4.92 | 2.77 |