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Table 5 Assay results for the determination of the FF and GLY in their synthetic mixture by the proposed RDS and reference methods

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

  Proposed RDS method (synthetic mixture) Reference method [39]
Conc. taken (μg/mL) % Founda Conc. taken (μg/mL) % Founda
FF GLY FF GLY FF GLY FF GLY
Data 7.8 15.25 99.24 99.41 11.0 19.0 99.42 101.25
6.6 13.0 100.351 99.97 9.4 16.0 98.24 100.58
5.4 10.75 99.54 100.89 8.8 13.0 99.31 100.36
4.2 8.5 99.42 100.87 7.2 10.0 100.45 99.34
3.0 6.25 100.94 100.39 5.5 7.0 99.78 99.24
1.8 4.0 99.67 99.77 3.9 4.0 98.54 98.36
\({\bar{\text{X}}}\)   99.86 100.22   99.29 99.86
± SD 0.65 0.60 0.81 1.6
t-value 1.35 (10.0) 0.73 (10.0)  
F-value 1.54 (5.5) 3.08 (5.5)
  Proposed RDS method (MDI) Reference method [39]
Conc. taken (μg/mL) % Founda Conc. taken (μg/mL) % Founda
FF GLY FF GLY FF GLY FF GLY
Data 7.8 15.25 99.25 100.87 11.0 7.93 99.02 100.05
6.6 13.0 100.74 99.68 9.4 7.98 99.21 101.35
5.4 10.75 100.92 99.35 8.8 8.00 98.21 98.35
4.2 8.5 100.24 100.97 7.2   99.74 99.65
3.0 6.25 99.52 100.22 5.5   100.38 99.35
1.8 4.0 100.34 100.98 3.9   99.17 98.35
\({\bar{\text{X}}}\)   100.17 100.35   99.29 99.52
± SD 0.66 0.71 0.73 1.13
t-value 2.19 (10.0) 1.52 (10.0)  
F-value 1.21 (5.5) 2.55 (5.5)
  1. Nominal content for GLY in Bevespi® aerosphere by the proposed method = 9.0 μg/buff
  2. Each result is the average of three separate determinations
  3. aNominal content for FF in Bevespi® aerosphere by the proposed method = 4.8 μg/buff