Summary analytical methods for olive oil used by participants in the last ten proficiency. Tests in Olive Oil (COI PT series).

Table 4: Summary analytical methods for olive oil used by participants in the last ten proficiency. Tests in Olive Oil (COI PT series).

Extraction Solvent

Cleanup Technique

Sample Weight

Detection

Acetonitrile

Hexane/Acetonitrile (1/4 v/v)

Cyclo-Hexane/Ethyl acetate (1/1 v/v)

Freezing (-20 ℃ overnight)

GPC

Without cleanup

Cartridge SPE C18

Cartridge SPE silica

Selective detectors (ECD, FPD, NPD) without mass spectrometry (MS) confirmation.

QuEChERS Dispersive SPE (MgSO₄/PSA/GCB/C₁₈)

Freezing (-20 ℃ overnight)

GPC

Without cleanup

Cartridge SPE C18

Cartridge SPE silica

Usually 1.5 g - 2 g - 5 g - 10 g

Gas Chromatography (GC) and/or Liquid Chromatography (HPLC) coupled with Mass Spectrometry (HRMS Orbitrap, TOF, Single Quadrupole, Triple Quadrupole, Ion Trap).

Selective detectors (ECD, FPD, NPD) without mass spectrometry (MS) confirmation