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Table 2 Quantification of total phenolic compounds extracted from the solids of untreated and pretreated (severity 1.57) RH and RS

From: Release of cell wall phenolic esters during hydrothermal pretreatment of rice husk and rice straw

Severity Total (mono) phenolics (mg/g of raw materials)
Rice husk Rice straw
1 Mol NaOH 4 Mol NaOH 1 Mol NaOH 4 Mol NaOH
Raw 14.57 ± 0.57 15.82 ± 1.41 14.37 ± 0.45 17.20 ± 1.57
1.57 15.90 ± 0.44 15.96 ± 1.21 16.23 ± 0.78 14.24 ± 0.83
  1. Untreated and pretreated samples were saponified with 1 Mol NaOH and 4 Mol NaOH separately before analysis by HPLC
  2. Results were calculated as mg/g of original lignocellulosic raw materials. n = 3