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Table 1 Compositional analysis of solids of non-pretreated and IL-pretreated woody samples

From: Comparison of [HSO4]−, [Cl]− and [MeCO2]− as anions in pretreatment of aspen and spruce with imidazolium-based ionic liquids

Sample

% Dry mass

Klason a

ASL b

Arabinan

Galactan

Glucan

Xylan

Mannan

Acetyl

Aspen

12.9 ± 0.2

6.7 ± 0.1

0.7 ± 0.5

1.4 ± 0.1

45.3 ± 1.2

15.9 ± 0.4

2.6 ± 0.1

4.6 ± 0.1

[HSO4]

12.9 ± 0.6

3.5 ± 0.3

ND c

ND

62.7 ± 0.6

9.2 ± 0.2

3.4 ± 0.1

1.0 ± 0.1

[Cl]

14.6 ± 0.2

6.8 ± 0.2

ND

1.2 ± 0.1

47.4 ± 0.6

16.5 ± 0.2

2.2 ± 0.1

5.4 ± 0.7

[MeCO2]

17.9 ± 0.4

5.8 ± 0.4

ND

0.9 ± 0.1

53.3 ± 1.3

14.0 ± 0.3

2.3 ± 0.1

1.5 ± 0.1

T-aspen

52.0 ± 1.4

2.8 ± 0.1

ND

ND

32.0 ± 0.1

2.6 ± 0.1

1.4 ± 0.1

1.4 ± 0.1

[HSO4]

57.7 ± 0.4

1.5 ± 0.1

ND

ND

31.6 ± 1.1

1.4 ± 0.1

ND

ND

[Cl]

53.3 ± 0.5

2.1 ± 0.2

ND

ND

29.0 ± 0.1

2.3 ± 0.1

ND

1.4 ± 0.3

[MeCO2]

54.1 ± 0.9

2.6 ± 0.1

ND

ND

30.1 ± 1.2

2.1 ± 0.1

ND

ND

Spruce

28.6 ± 0.8

3.9 ± 0.1

1.0 ± 0.1

2.0 ± 0.1

43.6 ± 0.2

6.0 ± 0.1

11.4 ± 0.1

1.1 ± 0.2

[HSO4]

29.9 ± 0.6

3.1 ± 0.1

ND

0.7 ± 0.1

52.5 ± 0.2

3.7 ± 0.1

8.5 ± 0.1

ND

[Cl]

28.4 ± 0.1

4.9 ± 0.1

1.1 ± 0.1

2.0 ± 0.1

43.7 ± 0.9

6.3 ± 0.1

11.1 ± 0.2

0.8 ± 0.1

[MeCO2]

26.0 ± 0.6

5.0 ± 0.4

0.8 ± 0.1

1.7 ± 0.1

48.3 ± 0.5

4.9 ± 0.1

11.5 ± 0.0

ND

T-spruce

47.3 ± 0.2

5.9 ± 0.4

ND

0.6 ± 0.1

39.9 ± 0.2

1.6 ± 0.1

3.8 ± 0.1

ND

[HSO4]

49.4 ± 1.9

3.6 ± 0.1

ND

ND

43.2 ± 0.1

0.9 ± 0.1

2.0 ± 0.1

ND

[Cl]

43.4 ± 0.4

6.0 ± 1.9

ND

0.6 ± 0.1

40.0 ± 1.1

1.5 ± 0.1

3.2 ± 0.1

ND

[MeCO2]

41.8 ± 0.5

5.6 ± 0.2

ND

0.5 ± 0.1

38.9 ± 0.3

1.2 ± 0.0

2.7 ± 0.1

ND

  1. a Klason Klason lignin
  2. b ASL acid-soluble lignin
  3. c ND not detectable
  4. Data based on duplicate measurements
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BMC Biotechnology

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