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Table 7 Accuracy of the proposed methods using standard addition method

From: Multiple analytical methods for determination of formoterol and glycopyrronium simultaneously in their novel combined metered dose inhaler

Added concentration to Bevespi® aerosphere® 0.48, 0.9 (μg/mL) % Recoverya
FF GLY
FF GLY DS RDS IPC DS RDS IPC
1.2 2.25 100.51 99.1 100.95 99.1 99.47 100.26
2.4 4.5 99.83 99.83 100.32 99.79 100.55 99.75
4.8 9.0 99.31 100.43 99.24 100.3 99.84 100.63
Mean ± RSD % 99.88 ± 0.49 99.81 ± 0.55 100.1 ± 0.72 99.76 ± 0.50 99.93 ± 0.45 100.13 ± 0.4
  1. Each result is the average of three separate determinations
  2. aNominal content for FF Bevespi® aerosphere by the proposed method = 9.0 μg/buff, Nominal content for GLY in Bevespi® aerosphere by the proposed method = 4.8 μg/buff, assay was performed on three levels, each result is the average of three separate determinations