Method for determining benzotriazoles ultraviolet stabilizer based on ultrahigh-performance conjunction chromatography

The invention discloses a method for determining benzotriazoles ultraviolet stabilizer based on ultrahigh-performance conjunction chromatography. The method comprises the following steps: (1) dissolving a to-be-tested sample in a solvent to prepare a sample solution; (2) performing the ultrahigh-performance conjunction chromatographic analysis for the sample solution to obtain chromatographic analysis data, wherein the chromatographic conditions: a nonpolar chromatographic column, system backpressure of 1900 to 2000 psi, chromatographic column temperature of 40 to 50 DEG C, the mobile phase being supercritical CO2 and isopropanol, the sample inlet volume of 0.5 to 10 microliters, flow rate of 0.6 mL/min, a PDA detection wavelength of 340 nm; and (3) comparing the chromatographic analysis data obtained in the step (2) with predetermined benzotriazole ultraviolet stabilizer standard data to obtain a content of the benzotriazole ultraviolet stabilizer. According to the method, nontoxic supercritical CO2 is mainl