Table 2.
Validation data of HS-SPME method. (LL: Low Level: 10 μg kg−1, ML: Medium Level: 50 μg kg−1, HL: High Level: 200 μg kg−1).
| Isophorone | 1-Νonanol | Ethyl Octanoate | Octanal | Nonane | Nonanoic acid | ||
|---|---|---|---|---|---|---|---|
| Corelation coefficient (R2) | 0.9985 | 0.9985 | 0.9981 | 0.9992 | 0.9991 | 0.9900 | |
| LOD (μg kg−1) | 3.2 | 3.0 | 2.3 | 2.7 | 2.9 | 8.0 | |
| LOQ (μg kg−1) | 9.6 | 9.0 | 6.9 | 8.0 | 8.6 | 24 | |
| Repeatability RSD% | HL | 2.3 | 5.3 | 3.5 | 2.5 | 5.1 | 6.3 |
| ML | 6.5 | 7.4 | 13 | 6.8 | 7.6 | 13 | |
| LL | 8.1 | 11 | 14 | 12 | 9.2 | 11 | |
|
Intermediate Precision RSD% |
HL | 4.7 | 9.8 | 8.4 | 3.2 | 8.2 | 9.9 |
| ML | 7.8 | 8.7 | 12 | 7.7 | 8.3 | 14 | |
| LL | 6.3 | 11 | 19 | 9.0 | 9.8 | 14 | |
| Recovery% | HL | 95 | 99 | 99 | 97 | 97 | 98 |
| ML | 94 | 98 | 101 | 94 | 100 | 93 | |
| LL | 95 | 113 | 95 | 91 | 105 | 96 | |