Abstract: Inductively coupled plasma mass spectrometry (ICP-MS) with dynamic reaction cell (DRC) was applied for the direct determination of arsenic (As) and lead (Pb) in fruit juice via microinjection and online addition of 115In as internal standard. The limits of detection for As and Pb were both less than 2.000μg/L. The results showed that the spiked recovery rates were in the range of 95.69%－105.45% for As and 100.98%－105.14% for Pb. This method was validated by juice reference material. The analytical value (0.0875 μg/g) was consistent with the recommended value (0.085 μg/g) with RSDs of 2.50% and 2.94% for As and Pb, respectively. The results obtained using microwave digestion followed by ICP-MS and the method showed no significant difference. The method was simple, rapid, accurate and completely met the requirements for the determination of arsenic and lead in fruit juice.

Key words: inductively coupled plasma mass spectrometry (ICP-MS), juice, arsenic (As), lead (Pb), direct determination