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Table 2 Analytical performance data for the determination of FF and GLY by the proposed methods

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

Parameter

FF

GLY

DS208.27nm

RDS214/229nm

IPC210nm

DS1213.27nm

DS2239.86nm

RDS240/259nm

IPC210nm

Conc. range (μg/mL)

0.48–9.6

0.48–9.6

0.048–4.8

0.9–18

0.9–18

0.9–18

0.09–0.9

r

0.9999

0.9999

0.9999

0.9999

0.9999

0.9999

0.9999

Slope

0.033

0.87

20.8

0.01

0.013

0.36

49.26

Intercept

− 0.014

0.99

− 0.22

0.02

0.002

− 0.23

3.76

LOD (μg/mL)

0.06

0.04

0.018

0.15

0.08

0.17

0.051

LOQ (μg/mL)

0.19

0.1

0.055

0.46

0.28

0.52

0.154

Sy/x

9.00 × 10−4

1.4 × 10−3

0.19

7.00 × 10−4

4.00 × 10−4

26.6 × 10−3

1.31

Sa

6.00 × 10−4

1.00 × 10−3

0.11

5.00 × 10−4

3.00 × 10−4

18.6 × 10−3

0.76

Sb

1.00 × 10−4

2.00 × 10−4

0.04

4.80 × 10−5

2.7 × 10−5

1.8 × 10−3

0.16

% RSD

0.49

0.18

0.63

0.69

0.35

0.63

0.54

% Error

0.15

0.06

0.2

0.22

0.11

0.2

0.17

  1. N.B.—Sy/x = standard deviation of the residuals
  2. Sa = standard deviation of the intercept of regression line
  3. Sb = standard deviation of the slope of regression line
  4. % Error = RSD%/√n