Table 3. Comparison of physical characteristics between pre- and post-spray freeze-dried soluble coffee samples
| | Pre-SFD | Post-SFD |
| Moisture | content (%) | 6.99±0.261) | 4.96±0.26 |
| Color | L* | 32.87±0.53 | 42.98±0.25 |
| a* | 14.25±0.21 | 13.66±0.06 |
| b* | 25.29±0.22 | 28.87±0.12 |
| C*2) | 29.03±0.10 | 31.94±0.11 |
| ΔE3) | - | 10.74±0.82 |
All values are expressed as the mean±SD of triplicate determinations.
C* = (a*2 + b*2)1/2
ΔE = {(L*2 - L*1)2 + (a*2 - a*1)2 + (b*2 - b*1)2}1/2