Table 4 Assay results for the determination of ERD using the proposed methods.

From: Multiple green spectroscopic methods for erdosteine determination in bulk and dosage form with extensive greenness evaluation

 

Method I

Method II

Method III

Method IV

Erdolytic® capsules

% Mean Recovery ± SDa

99.7 ± 0.46

99.8 ± 0.42

99.8 ± 0.42

100.3 ± 0.46

RSD%b

0.46

0.42

0.42

0.46

Er %c

−0.3

−0.2

−0.2

0.3

Anova (Single factor)

Alpha value

p-value

F Statistic

F Critical

 

0.05

0.16

1.95

3.24

Mucotec® capsules

% Mean Recovery ± SDa

99.9 ± 0.54

100.6 ± 1.09

100.6 ± 0.87

99.5 ± 1.45

RSD%b

0.53

1.09

0.87

1.45

Er %c

−0.1

0.6

0.6

-0.5

Anova (Single factor)

Alpha value

p-value

F Statistic

F Critical

 

0.05

0.11

2.23

3.24

  1. aMean % recovery ± SD for five determinations.
  2. b% relative standard deviation.
  3. c% Relative error.