Dry mass (mg) | Bulk biomass | Ash | Lignin (AIL + ASL) | Glucan | Xylan | Arabinan | Acetyl | HMF | Furfural |
---|
[C4mim]Cl | | | | | | | | | |
Untreated |
1461
| 46 | 383 | 656 | 324 | 22 | 46 | n/a | n/a |
SF1 | 1318 | 47 | 344 | 627 | 270 | 14 | 39 | n/a | n/a |
LF1 | 92 | n/d | 0.4* | 16 | 60 | 10 | 7 | 0.6 | 1.2 |
LF1 oligo | | | | 13 | 58 | 2 | 6 | | |
Total mass recovered |
1411
| 47 | 344 | 636 | 317 | 24 | 46 | | |
[C2mim]Cl | | | | | | | | | |
Untreated |
1346
| 42 | 353 | 605 | 299 | 20 | 42 | n/a | n/a |
SF1 | 643 | 39 | 185 | 343 | 71 | 4 | 11 | n/a | n/a |
LF1 | 446 | n/d | 3* | 188 | 214 | 14 | 28 | 1.2 | 1.4 |
LF1 oligo | | | | 175 | 204 | 3 | 27 | | |
Total mass recovered |
1089
| 39 | 188 | 516 | 267 | 20 | 39 | | |
[C2mim]OAc | | | | | | | | | |
Untreated |
699
| 22 | 183 | 314 | 155 | 10 | 22 | n/a | n/a |
SF1 | 463 | 26 | 73 | 316 | 62 | 7 | 7 | n/a | n/a |
LF1 | 88 | n/d | 17* | 1 | 85 | 5 | n/d | 1.1 | 1.8 |
LF1 oligo | | | | bdl | 83 | 5 | n/d | | |
Total mass recovered |
551
| 26 | 90 | 316 | 125 | 12 | 7 | | |
- Masses (average of duplicates).
- Masses expressed on dry basis. Glucan is considered equal to cellulose, HMF (Hydroxymethyl furfural) is expressed as glucan equivalents and furfural as xylan equivalents, SF1: solid fraction 1, recovered from the first water addition (water:IL mass ratio = 0.5), LF1: liquid fraction 1, recovered from the first water addition (water:IL mass ratio = 0.5), LF1 oligo: oligosaccharides in LF1, n/d: not determined, n/a: not applicable, bdl: barely detectable.
- The estimates of standard deviation (absolute, based on duplicate IL pretreatments, 3 df) of the recovery (and analysis) of these components (as%mass starting component) in SF1 are 2% for glucan, 2% for xylan, 3% for arabinan, 1% for acetyl and 2% for lignin (acid soluble + acid insoluble). In LF1, these estimates of standard deviation for the oligosaccharides are 1% for glucan, 2% for xylan, 18% for arabinan and 3% for acetyl and for the monosaccharides they are 0.2% for glucan, 0.2% for xylan, 15% for arabinan and 0.7% for acetyl. The unacceptably high standard deviation for arabinan is attributed to its very low concentrations in the liquid fractions. *This mass does not represent all the lignin mass in the LF1 but only the recoverable lignin mass in the sum of SF2 and SF3 precipitates.