Abstract: A quick analytical method for determining arsenic, lead, mercury and cadmium element in vegetable through only one digestion process was discussed, and the effects of the temperature and remained solution of digestion were investigated too. The result showed that 120.0 ℃ is the highest temperature that four elements can not be damnified during wetted digestion. When remained solution of digestion is between 0.50～1.50 ml (volume of sample 10.00 ml), ideal recoveries (96.7%～103.3%) can be obtained. The limits of detection are 0.002 mg/L (As), 0.005 mg/L (Pb), 0.0002 mg/L (Hg) and 0.0002 mg/L (Cd), and the RSDs are all less than 5.4%.

Key words: vegetable, lead, cadmium, mercury, arsenic, analytical method