Heavy metal standard substance for artificial leather and preparation method

The invention discloses a heavy metal standard substance for artificial leather. The standard substance is prepared from the following components: 50%-70% of polyurethane resin, 2%-8% of a thickener,20%-40% of a solvent, 0.5%-1.5% of a dispersant and nine target heavy metal compounds including a lead element compound, a cadmium element compound, a chromium element compound, a mercury element compound, an antimony element compound, a copper element compound, a cobalt element compound, an arsenic element compound and a nickel element compound, wherein every 1 kg of the heavy metal standard substance for the artificial leather contains 10-10000 mg of the heavy metal elements. A preparation method of the standard substance comprises the following steps: raw material preparation, grinding, mixing, grinding rolling, vacuum defoaming, solvent replacement, drying, shearing and storage. The preparation process is simple, the problem of compatibility between organic components and inorganic components is solved, design