Skip to main content

Table 1 Experimental design using L9 (3^4)-Taguchi orthogonal array

From: Application of orthogonal optimization and feedforward backpropagation model in the microwave extraction of natural antioxidants from tropical white pepper

Run

Uncoded control factors

I (%)

A (μg/mL)

Estimated

 

x 1

x 2

x 3

x 4

  

S/N ratio

1

60

250

0.105

6

54.86 ± 0.06

109.46 ± 0.12

34.7851

2

60

300

0.154

8

54.21 ± 0.30

107.51 ± 0.03

34.6816

3

60

350

0.300

10

57.57 ± 0.62

117.60 ± 0.03

35.2039

4

90

250

0.154

10

71.32 ± 0.38

158.89 ± 0.01

37.0642

5

90

300

0.300

6

76.82 ± 0.23

175.41 ± 0.04

37.7095

6

90

350

0.105

8

74.58 ± 0.02

168.68 ± 0.11

37.4524

7

120

250

0.300

8

75.14 ± 0.11

170.36 ± 0.02

37.5174

8*

120

300

0.105

10

91.02 ± 0.15*

218.05 ± 0.03*

39.1827

9

120

350

0.154

6

89.07 ± 0.04

212.19 ± 0.43

38.9946

  1. Mean ± SD (n = 3)
  2. x1 irradiation time (min), x2 microwave power level (W), x3 feed particle size (mm), x4 liquid-to-solvent ratio (mL/g), I inhibition (%), A antioxidant activity (μg/mL)
  3. *Optimum trial