Gold content determination method

The invention discloses a gold content determination method, which includes: (1) conducting ignition on a to-be-tested sample in a muffle furnace to remove sulfur, arsenic, carbon and organic matters; (2) adding sodium fluoride and aqua regia into the scorched to-be-tested sample for dissolution so as to obtain a dissolved solution; (3) adding foam plastic into the dissolved solution to conduct adsorption treatment so that the foam plastic can adsorb gold in the dissolved solution; (4) taking out the foam plastic subjected to adsorption treatment and conducting ignition ashing so as to obtain an ashing product; (5) sequentially adding aqua regia, water, a phosphoric acid-sodium phosphate solution, a potassium bromide solution, a diphenylthiourea acetone solution and ethyl acetate into the ashing product in order to perform extraction; (6) performing separation to obtain a gold-containing organic phase; and (7) employing a flame atomic absorption spectrometer to measure the gold-containing organic phase so as to determine the gold content of the to-be-tested sample. With the method, the minimum detection limit of the flame atomic absorption method for determination of gold content can be reduced to 0.050g/t.