Table 3.
HPLC analysis of organic acid profile.
| (mg/100 g DB) | PP | PH | PF | PMW | PMWC | NR |
|---|---|---|---|---|---|---|
| Oxalic acid (OA) | 22.28 ± 1.89 | 11.32 ± 0.78 | 15.39 ± 0.96 | 8.12 ± 0.25 | 9.22 ± 0.36 | 11.94 ± 0.85 |
| Tartaric acid (TA) | 1.19 ± 0.005 | 0.68 ± 0.003 | 0.77 ± 0.03 | 1.05 ± 0.05 | 0.39 ± 0.003 | 0.47 ± 0.005 |
| Mallic acid (MA) | 9.78 ± 0.98 | 4.82 ± 0.03 | 6.95 ± 0.09 | 10.09 ± 0.68 | 6.37 ± 0.13 | 0.89 ± 0.008 |
| Lactic acid (LA) | 199.1 ± 10.36 | 33.12 ± 1.65 | 130.8 ± 11.32 | 117.8 ± 5.36 | 84.72 ± 3.96 | 105.3 ± 4.35 |
| Acetic acid (AA) | 105 ± 9.89 | 37.36 ± 2.36 | 120.9 ± 7.65 | 35.74 ± 2.39 | 87.47 ± 4.02 | ND |
| Citric acid (CA) | 160.2 ± 8.96 | 130.5 ± 7.98 | ND | 74.56 ± 3.15 | 114.6 ± 4.96 | 38.63 ± 1.85 |
| Propionic acid (PA) | 17.99 ± 1.03 | 32.25 ± 2.35 | 81.21 ± 3.36 | 53.66 ± 2.03 | ND | 20.38 ± 1.06 |
| Sinapic acid (SA) | 2.026 ± 0.58 | 0.38 ± 0.005 | 1.18 ± 0.03 | 0.33 ± 0.001 | 5.22 ± 0.05 | 0.213 ± 0.002 |
| Fumaric acid (FA) | ND | 28.17 ± 1.01 | 4.69 ± 0.65 | 33.3 ± 1.65 | ND | 3.37 ± 0.85 |
All the results were reported in the above table as mean value ± SD (standard deviation).
ND = Non-detectable.
[PP = Pineapple pulp rasgulla, PH = Hot air dried pineapple rasgulla, PF = Freeze-dried pineapple rasgulla, PMW = Microwave dried pineapple rasgulla, PMWC = Microwave convective dried pineapple rasgulla, NR = Normal rasgulla].