Table 2.
Determination of GEs content in oil samples by the proposed method and AOCS Cd 29c-13.
| Determined GEs content (glycidol equivalent, mg/kg) | Theoretical GEs content (glycidol equivalent, mg/kg) | Δdetermined-theoretical a(%) | |||
|---|---|---|---|---|---|
|
|
|
||||
| This study | AOCS Cd 29c-13 |
This study | AOCS Cd 29c-13 |
||
| Sample A | 0.88 | 0.67 | 1.0 | −12.0 | −33.0 |
| Sample B | 2.89 | 2.10 | ΔSample C–B = 2.0 | 6.00 | −45.0 |
| Sample C | 5.01 | 3.20 | |||
| Sample D | 4.32 | 8.10 | ΔSample E–D = 5.0 | −8.40 | 38.0 |
| Sample E | 8.90 | 15.0 | |||
The same blind samples A to E were analyzed by our proposed method (this study) and AOCS Cd 29c-13 (conducted by an accredited third-party lab, Lab B), respectively. Sample A: purified extra virgin olive oil spiked with glycidyl oleate at 1.0 mg/kg (glycidol equivalent); sample B: commercial rice bran oil; sample C: sample B spiked with additional 2.0 mg/kg (glycidol equivalent) glycidyl oleate; sample D: commercial palm oil; sample E: sample D spiked with additional 5.0 mg/kg (glycidol equivalent) glycidyl oleate.
a
Δ determined-theoretical a(%) is defined as .