Method for determining cadmium content in zirconium or zirconium alloy by inductively coupled plasma mass spectrometry

The invention discloses a method for determining the content of cadmium in zirconium or zirconium alloy by inductively coupled plasma mass spectrometry, which comprises the following steps: dissolving a zirconium or zirconium alloy sample by hydrofluoric acid and nitric acid, masking zirconium element by triammonium citrate, adjusting the pH value to 9-10 by ammonia water, extracting and separating cadmium by dithizone-trichloromethane, and measuring the content of cadmium in the zirconium or zirconium alloy by using an inductively coupled plasma mass spectrometry method. Perchloric acid is added into the obtained cadmium-containing organic phase for smoking, hydrochloric acid is adopted for dissolution, and an analysis test solution is obtained for determination through inductively coupled plasma mass spectrometry. According to the method, the zirconium element is masked by adopting the triammonium citrate, the matrix element zirconium and the element cadmium to be detected are separated by combining an orga