Table 1.
Identification of different fatty acids (saturated and unsaturated) in air-dried and sun-dried raisins during storage.
| S/No | RT | Fatty Acids | Common Name | ID | Linear Equation | R | Air-Dried | Sun-Dried | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Saturated Fatty Acid | 0-M | 4-M | 8-M | 12-M | 0-M | 4-M | 8-M | 12-M | ||||||
| 1 | 10.4 | C12:0 | Lauric acid | 1 | y = 0.1282x + 0.4898 | 0.999 | 2.39a | 0.56b | 0.56b | 0.56b | 0.51b | 0.49b | 0.50b | 0.50b |
| 2 | 11.8 | C14:0 | Myristic acid | 1 | y = 0.1344x + 0.919 | 0.992 | 1.16a | 1.07b | 1.09b | 1.09b | 0.99c | 0.95d | 0.95d | 0.94d |
| 3 | 12.6 | C15:0 | Pentadecylic acid | 1 | y = 0.1395x + 1.8572 | 0.991 | 1.89b | 1.90b | 1.91a | 1.91a | 1.88c | 1.86d | 1.87d | 1.86d |
| 4 | 13.4 | C16:0 | Palmitic acid | 1 | y = 0.0148x + 0.8343 | 0.990 | 1.68a | 1.37b | 1.26c | 1.27c | 0.97d | 0.91e | 0.91e | 0.92e |
| 5 | 14.4 | C17:0 | Margaric acid | 1 | y = 0.1428x + 0.5216 | 0.993 | 0.63a | 0.62a | 0.62a | 0.62a | 0.55b | 0.53b | 0.54b | 0.53b |
| 6 | 15.4 | C18:0 | Stearic acid | 1 | y = 0.1428x + 0.5216 | 0.993 | 4.41a | 3.75b | 3.45c | 3.38c | 1.14d | 1.10d | 1.04d | 1.10d |
| 7 | 18.2 | C20:0 | Arachidic acid | 1 | y = 0.2098x + 0.6079 | 0.991 | 0.99a | 0.96a | 0.95a | 0.96a | 0.69b | 0.65b | 0.67b | 0.66b |
| 8 | 21.9 | C22:0 | Behenic acid | 1 | y = 0.1511x + 0.2175 | 0.995 | 0.70a | 0.68a | 0.69a | 0.68a | 0.29b | 0.27b | 0.28b | 0.28b |
| 9 | 24.4 | C23:0 | Tricosylic acid | 1 | y = 0.1259x + 0.2172 | 0.995 | 0.28ab | 0.28ab | 0.29a | 0.29a | 0.23c | 0.23c | 0.23c | 0.23c |
| 10 | 27.6 | C24:0 | Lignoceric acid | 1 | y = 0.0953x + 0.1182 | 0.997 | 0.26a | 0.24a | 0.24a | 0.24a | 0.15b | 0.14b | 0.14b | 0.14b |
| Unsaturated Fatty Acid | 0-M | 4-M | 8-M | 12-M | 0-M | 4-M | 8-M | 12-M | ||||||
| 11 | 13.8 | C16:1 | Palmitoleic acid | 1 | y = 0.1042x + 0.7286 | 0.991 | 0.73a | 0.74a | 0.74a | 0.74a | NF | NF | NF | NF |
| 12 | 15.8 | C18:1 | Oleic acid | 1 | y = 0.1283x + 1.5322 | 0.993 | 2.03a | 1.51b | 1.58b | 1.62b | 0.70c | 0.66d | 0.64d | 0.66d |
| 13 | 16.4 | C18:2 | Linoleic acid | 1 | y = 0.0883x + 1.3784 | 0.993 | 3.52a | 2.78b | 2.66bc | 2.53c | 1.61d | 1.47d | 1.50d | 1.52d |
| 14 | 17.3 | C18:3 | Linolenic acid | 1 | y = 0.1006x + 0.5955 | 0.997 | 1.96a | 1.93ab | 1.90b | 1.92ab | 1.59c | 1.57c | 1.57c | 1.59c |
| 15 | 18.6 | C20:1 | Paullinic acid | 1 | y = 0.053x + 0.2264 | 0.994 | 0.24a | 0.24a | 0.24a | 0.24a | NF | NF | NF | NF |
| 16 | 22.4 | C22:1 | Erucic acid | 2 | 1.54a | 1.10b | 1.04b | 1.10b | 0.68c | 0.63c | 0.67c | 0.66c | ||
RT: retention time. ID (identification method): 1, identified, mass spectrum and RI were in accordance with standards; 2, tentatively identified, mass spectrum matched in the standard NIST 2008 library and RI matched with NIST Standard Reference Database (NIST Chemistry WebBook). Linear equation: concentration in mg/L; x, peak area ratio of a compound into the internal standard (4-methyl-2-pentanol). R: Regression coefficient.