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Table 1 23 Experimental factorial designs and their dependent responses for RP-HPLC–UV separation of BIL and MNT mixture

From: Green quality by design HPLC approach for the simultaneous determination of Bilastine and Montelukast

Design order

Experimental factorial design

Dependent responses

  

Std order

Run order

%MeOH (A)

%ACN (B)

pH (C)

Flow rate (D)

T2 of MNT

NTP 2 of MNT

Run time

Rs

5

1

85

3

6

0.8

1.42

429

6.1

6.1

6

2

92

3

6

0.8

1.3

1642

3.5

3.5

14

3

92

3

6

1.2

1.3

893

3.6

3.6

15

4

85

6

6

1.2

1.7

661

5

5

4

5

92

6

3

0.8

1.2

3226

7.3

7.3

9

6

85

3

3

1.2

1.65

165

2.9

2.9

1

8

85

3

3

0.8

1.9

151

2.81

2.81

2

9

92

3

3

0.8

1.25

3341

10

10

8

10

92

6

6

0.8

1.12

1261

2.8

2.8

16

11

92

6

6

1.2

1.28

1135

2.56

2.56

3

12

85

6

3

0.8

1.56

328

3.85

3.85

13

14

85

3

6

1.2

1.41

1417

6.48

6.48

11

15

85

6

3

1.2

1.36

591

5.20

5.20

12

16

92

6

3

1.2

1.20

2159

5.90

5.90

10

17

92

3

3

1.2

1.20

2367

8.40

8.40

7

18

85

6

6

0.8

1.40

918

5.90

5.90

  1. MeOH%: MeOH% (v/v) in the organic mobile phase (low level 85% and high level 92%)
  2. %ACN: ACN% (v/v) in the organic mobile phase (low level 3% and high level 6%)
  3. pH: Aqueous mobile phase pH (low level 3 and high level 6)
  4. Flow rate (low level 0.8 and high level 1.2)
  5. Rs1: resolution between BIL & MNT