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Table 2 XPS analysis of poplar after pretreated with 40%–100% HPAA (v/v) at 60 °C for 2 h

From: Alkaline post-incubation improves the saccharification of poplar after hydrogen peroxide–acetic acid pretreatment

Pretreatment label

O/C

C1 (%)

C2 (%)

C3 (%)

Raw

0.39 ± 0.0

56.3 ± 0.1

31.3 ± 0.5

12.4 ± 0.4

HPAA40

0.38 ± 0.0

55.1 ± 0.2

33.4 ± 0.1

11.5 ± 0.3

HPAA60

0.40 ± 0.0

52.3 ± 0.7

34.7 ± 0.5

13.0 ± 0.1

HPAA80

0.45 ± 0.0

46.7 ± 0.0

37.6 ± 0.7

15.7 ± 0.7

HPAA100

0.43 ± 0.0

47.3 ± 0.6

37.0 ± 1.1

15.7 ± 0.5

  1. C1 corresponds to class of carbon that corresponds to carbon atoms bonded to carbon or hydrogen (C–C or C-H)
  2. C2 corresponds to class of carbon atoms bonded to single non-carbonyl oxygen(C–O)
  3. C3 corresponds to class of carbon atoms bonded to a carbonyl or two non-carbonyls (C=O or O–C–O)
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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