Highly-water-soluble target compound universal precipitation purifier and gas chromatography-mass spectrometry detection pretreatment method thereof

The invention discloses a highly-water-soluble target compound universal precipitation purifier and a gas chromatography-mass spectrometry detection pretreatment method thereof. The highly-water-soluble target compound universal precipitation purifier is composed of a primary precipitator and a secondary precipitator; when the highly-water-soluble target compound universal precipitation purifier is applied to detecting polar target compounds having absorptive precipitation effects on metal ions, the primary precipitator is prepared by mixing acetonitrile, low alcohols, ammonium acetate buffersolution and EDTA-Na2 (ethylene diamine tetraacetic acid-disodium) at a volume ratio of 4:1:4:1; when the highly-water-soluble target compound universal precipitation purifier is applied to other highly-water-soluble target compounds, the primary precipitator is prepared by mixing acetonitrile, low alcohols and ammonium acetate buffer solution at a volume ratio of 4:1:5; the secondary precipitatoris methylene dichloride o