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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