TABLE 2.
The calculated % recovery by spiking different standards concentration into the matrix (Vitis vinifera) and repeatability (%) in terms of intra‐day and inter‐day precision from SPME‐GC‐TQ/MS.
| Compounds | Recovery (%) | Repeatability (%) | |||
|---|---|---|---|---|---|
| 0.5 ng/g | 2.5 ng/g | 5 ng/g | Intra‐day | Inter‐day | |
| Hexanal | 90.32 ± 0.93 | 89.54 ± 0.87 | 92.54 ± 0.89 | 5.34 ± 1.23 | 4.35 ± 1.72 |
| Heptanal | 94.54 ± 0.56 | 91.54 ± 0.49 | 89.40 ± 0.39 | 6.45 ± 1.05 | 3.78 ± 1.32 |
| Pentanal | 88.54 ± 0.95 | 94.34 ± 0.89 | 93.55 ± 0.93 | 4.35 ± 1.12 | 5.43 ± 1.98 |
| Nonanal | 90.56 ± 1.34 | 88.98 ± 0.98 | 92.46 ± 1.45 | 2.64 ± 1.84 | 6.32 ± 2.54 |
| Furan | 96.54 ± 0.89 | 95.34 ± 0.89 | 91.32 ± 0.64 | 1.38 ± 0.89 | 3.89 ± 1.87 |
| Furfural | 95.32 ± 0.49 | 94.63 ± 0.08 | 93.76 ± 0.59 | 2.89 ± 1.75 | 4.90 ± 1.78 |
| Furan 2‐ethyl‐5 methyl | 90.64 ± 1.23 | 89.64 ± 0.83 | 91.45 ± 1.09 | 1.98 ± 4.89 | 3.89 ± 0.89 |
| Furan 2‐Propyl | 92.54 ± 1.09 | 94.89 ± 1.12 | 95.43 ± 0.49 | 3.98 ± 0.78 | 2.78 ± 0.78 |
| 3‐Furaldehyde | 95.32 ± 0.89 | 94.32 ± 0.89 | 92.32 ± 1.23 | 1.89 ± 1.78 | 7.34 ± 0.89 |
| 5‐Hydroxymethylfurfural | 93.45 ± 1.38 | 90.53 ± 0.04 | 89.36 ± 0.89 | 3.89 ± 2.44 | 5.32 ± 1.76 |
| 1‐pentanone 2‐furanyl | 87.54 ± 3.89 | 89.53 ± 1.02 | 88.45 ± 0.87 | 1.98 ± 0.78 | 2.67 ± 1.98 |
| 2‐Pentylfuran | 89.56 ± 1.34 | 90.49 ± 1.98 | 89.78 ± 1.49 | 1.45 ± 0.49 | 2.59 ± 1.04 |
Note: %Recovery = add analyte (ng)/found analyte (ng) × 100; % Relative Standard Deviation (RSD) = SD/mean × 100; data represented standard deviation of n = 3, where n represents number of samples.