Extraction and purification method for phthalate plasticizers in vegetable oil

The invention relates to the field of plasticizer determination, and discloses an extraction and purification method for phthalate plasticizers in vegetable oil. The extraction and purification methodcomprises the following steps: subjecting vegetable oil to sampling, carrying out dissolving and extracting with dichloromethane, allowing an extract (11) to pass through an MycoSep 226 AflaZon+ column (2) for purification, filling a sample loading bottle with the purified extract, and carrying out detection with a gas chromatograph-mass spectrometer. According to the invention, pretreatment is completed in 2 minutes, so the time of conventional pretreatment is greatly shortened; and the degree of cleanliness of a target extract is improved, and oil is completely removed from the target extract to protect a detection device, so instrument and equipment have consistent sensitivities and unchanged detection limits. The recovery rates of targets with various concentrations are 90% or above,and relative standard devi