Table 2 Determination of the 13C/1H correlation signals acquired in 2D-NMR HSQC of the samples and semiquantitative analysis of lignin
From: Effects of pH on steam explosion extraction of acetylated galactoglucomannan from Norway spruce
Label | δC/δH (ppm) | Assignment | A (citrate pH 4) (%) | B (control) (%) |
|---|---|---|---|---|
G5 | 114.9/6.7 | C5/H5 in a guaiacyl unit | 66 | 22 |
G6 | 118.6/6.7 | C6/H6 in a guaiacyl unit | – | 12 |
F3 | 124.1/7.5 | C3/H3 in a 5-HMF unit | 28 | 8 |
F4 | 109.4/6.6 | C4/H4 in a 5-HMF unit | 41 | 9 |
F6 | 55.4/4.5 | C6/H6 in a 5-HMF unit | − 42 | − 9 |