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Table 2 Elemental composition of untreated and preprocessed poplar biomass

From: Novel ethanol production using biomass preprocessing to increase ethanol yield and reduce overall costs

  Ca (µg/g) K (µg/g) Mg (µg/g) Na (µg/g) P (µg/g) S (µg/g)
Whole-tree chips (WTC)       
 Untreated 3140 ± 142 1893 ± 25 429 ± 10 0.0 ± 0.0 560 ± 35 228 ± 10
 Acidic 1776 ± 56 0.0 ± 0.0 0.0 ± 0.0 0.0 ± 0.0 183 ± 8 152 ± 5
 Alkaline 3248 ± 90 211 ± 19 358 ± 4 692 ± 0.0 250 ± 25 123 ± 7
 Neutral 3256 ± 77 1015 ± 27 391 ± 23 0.0 ± 0.0 495 ± 11 196 ± 4
Clean pulp chips (CPC)       
 Untreated 831 ± 28 793 ± 12 237 ± 19 0.0 ± 0.0 170 ± 5 77 ± 2
 Acidic 140 ± 6 0.0 ± 0.0 0.0 ± 0.0 0.0 ± 0.0 0.0 ± 0.0 66 ± 2
 Alkaline 778 ± 52 0.0 ± 0.0 225 ± 20 1594 ± 24 57 ± 3 50 ± 6
 Neutral 744 ± 20 0.0 ± 0.0 157 ± 10 0.0 ± 0.0 108 ± 14 70 ± 4
  1. Data represented as the mean values of duplicate analysis with standard deviation
  2. Other elements were analyzed (including barium, iron, manganese, and silica), but they were either not detected or they were present at trace amounts (lower than 50 µg/g)