Table 1 Influence of formulation and process variables on the particle size, PDI, and zeta potential of various phosalosomal formulations.

From: Follicular mediated etodolac phosalosomal gel for contact dermatitis alleviation, insights from optimization to in-vivo appraisal

Formula

Phosal Conc. (% v/v)

Homogeniz-ation time (min)

Homogenization speed (rpm)

Sonication time (min)

Surfactant type

Size (nm)

Zeta (mV)

PDI

PHs 1

3

0

4200

5

 

1260 ± 11.5

−35.5 ± 4.38

0.849 ± 0.133

PHs 2

3

10

4200

5

 

217.0 ± 4.67

−33.0 ± 5.67

0.421 ± 3.041

PHs 3

3

15

4200

5

 

160.3 ± 7.01

−31.3 ± 6.37

0.348 ± 2.450

PHs 4

3

30

4200

5

 

144.4 ± 0.46

−6.58 ± 1.01

0.205 ± 0.030

PHs 5

3

15

6700

5

 

130.4 ± 1.92

−9.76 ± 4.72

0.145 ± 0.011

PHs 6

3

15

12,000

5

 

156.9 ± 2.06

−0.44 ± 7.13

0.135 ± 0.016

PHs 7

3

15

4200

15

 

160.9 ± 11.12

−28.7 ± 07.58

0.317 ± 0.045

PHs 8

3

15

4200

30

 

169.1 ± 1.94

−29.2 ± 12.03

0.284 ± 0.020

PHs 9

1.5

15

4200

15

 

199.9 ± 9.95

−42.2 ± 4.03

0.507 ± 0.036

PHs 10

5

15

4200

15

 

135.0 ± 1.70

−22.0 ± 8.65

0.326 ± 0.047

PHs 12

3

15

4200

15

Span

185.0 ± 2.40

−49.1 ± 6.15

0.491 ± 0.001

PHs 13

3

15

4200

15

Tween (Oil phase)

133.3 ± 0.61

−16.5 ± 3.10

0.297 ± 0.007

PHs 14

3

15

4200

15

Tween (Aqueous phase)

269.0 ± 24.33

−22.1 ± 3.38

0.748 ± 0.065

PHs 15

3

15

4200

15

Tween + poloxamer

277.6 ± 12.15

−15.4 ± 4.04

0.368 ± 0.032

PHs 16

3

15

4200

15

Tween + poloxamer + SDC

148.8 ± 5.51

−19.2 ± 3.41

0.526 ± 0.082

PHs 17*a

3

15

4200

15

Tween (Oil phase)

264.5 ± 8.21

−32.6 ± 4.67

0.245 ± 4.86

PHs 18*b

3

15

4200

15

Tween (Oil phase)

304.3 ± 3.89

−35.1 ± 4.56

0.597 ± 1.06

  1. * Contains 0.06%w/v ETD, aRehydration with PB 5.5, bRehydration with PBS 7.4.
  2. The bold values reveal the changed variables.