Table 1 Comparison between some chemical and physical properties of the unpurified bioglycerol, purified bioglycerol by activated zeolite, and standard or pharmaceutical grade glycerol
Tests | Unpurified bioglycerol | Purified bioglycerol by activated zeolite | Standard or Pharmaceutical grade glycerol |
|---|---|---|---|
Odor | Fatty odor | Odorless | Odorless |
Color and appearance | Brownish black | Transparent | Transparent |
Glycerol % | 65.42 | 99.21 | 99.92 |
Water % | 13 | 0.29 | 0.28 |
Density % | 1.24 | 1.26 | 1.26 |
pH | 11.21 | 6.96 | 7.01 |
Free fatty acid% | 8.53 | 0.78 | 0.05 |