Table 2.
Carbohydrate content and sugar composition of coffee samples (S) and coffee extracts (E). The polysaccharides composition of coffee samples estimated, using the known sugar composition for these samples [32,43]. The results shown are the average of at least three independent assays.
| Sample Designation | Sugar Composition (% mol) |
Total Sugars (gsugar/gsample) |
Polysaccharides Content (gpolysaccharide/gsample) | Ratio | |||||
|---|---|---|---|---|---|---|---|---|---|
| Coffee Samples | Rha | Ara | Man | Gal | Glc | AGa) | GMb) | AG/GM | |
| S1 | 6.2 | 19.5 | 22.1 | 45.5 | 6.6 | 0.25 | 0.16 | 0.06 | 2.6 |
| S2 | 3.3 | 13.5 | 45.6 | 30.8 | 6.9 | 0.26 | 0.1 | 0.13 | 0.8 |
| S3 | 5.3 | 16.9 | 35.8 | 29.6 | 12.4 | 0.24 | 0.11 | 0.1 | 1.1 |
| Coffee Extracts | |||||||||
| E1 | 5.5 | 20.5 | 33.3 | 34.4 | 6.3 | 0.16 | 0.08 | 0.06 | 1.4 |
| E2 | 3.7 | 20.1 | 41.4 | 29.7 | 5 | 0.22 | 0.1 | 0.1 | 1 |
| E3 | 3.4 | 12.4 | 55.1 | 25.7 | 3.4 | 0.26 | 0.09 | 0.15 | 0.6 |
| E4 | 0.0 | 12.6 | 18.7 | 66.8 | 1.2 | 0.67 | 0.52 | 0.14 | 3.8 |
| E5 | 2.4 | 8.5 | 13.4 | 73.9 | 0.8 | 0.52 | 0.42 | 0.08 | 5.5 |
The estimation of the content of arabinogalactans (AG) considers all the amounts of arabinose and galactose at which it was subtracted the amount corresponding to a 5% of total mannose that is part of GM. The estimation also considers that all arabinose is part of AG. The polysaccharide content was determined by the following formulas: (a) (b) .