Table 3 FTIR spectrum analysis of functional groups of EPS present in biofilms of stucco mask
Sample 1 | Sample 2 | Functional group |
|---|---|---|
Absorption bands | ||
3315 | 3315 | Hydroxyl group (−OH) |
2928 | 2928 | Alkyl group (−CH 2 -) |
1805 | Carboxyl group (−COOH), aldehyde group (−CHO) or esterfunction (−COOR) | |
1642 | 1642 | Carbonyl group (−C = O or –CHO) Amide group (NH 2 ) |
1450 | 1450 | Alkyl group (−CH 2 - or –CH 3 ) |
1036 | 1036 | Hydroxyl group (−OH) |