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Table 1 Comparison of the main steps of the process by conventional and improved methods

From: An improved microscale method for extraction of phenolic acids from maize

Step

Conventional method

Improved method

Δ* (%)

Required sample (mg)

1000

50

95

Extraction time

 Free phenolics (min)

15

30

− 100

 Bound phenolics (h)

12

10

17

Drying time (days)

7

2

71

Consumed solvents

 Free phenolics (mL)

90

46

49

 Bound phenolics (mL)

1080

376

65

Solvents waste (mL)

324

106

67

Number of samples per batcha

9

66

− 633

  1. Δ*: Difference between conventional and improved methods expressed as percentages
  2. aAccording to the capabilities of the available centrifuge equipment