Pretreatment and detection method for measuring trace metal elements in seawater

The invention relates to the field of seawater detection, and particularly discloses a pretreatment and detection method for measuring trace metal elements in seawater. The pretreatment method comprises the following steps: (1) preparation of a seawater sample to be tested: taking a seawater filter sample into a separating funnel, adding a buffer solution, a chelating agent and an extraction solvent, shaking and extracting, collecting an organic phase, adding acid for back extraction, collecting an inorganic phase, and fixing the volume with pure water; (2) preparing a calibration curve, a quality control sample and a blank to-be-tested sample: preparing a curve series, the quality control sample and the blank in a separating funnel, adjusting the pH value, adding a buffer solution, a chelating agent and an extracting solvent, shaking and extracting, collecting an organic phase, adding acid for back extraction, collecting an inorganic phase, and fixing the volume by pure water; the trace metal elements are co