Determination of Pb and Cd in phosphate ores by high pressure sealed vessels assisted digestion-inductively coupled plasma mass spectrometry

A new method of determination of Pb and Cd in phosphate ores was established by high pressure sealed vessels assisted digestion-inductively coupled plasma mass spectrometry. The interference problems was researched in the testing process of phosphate rock. The matrix interference was overcomed by using different internal standard. Isotope and many atomic interference was overcomed by correction equation. Detection limits of Pb and Cd is 0. 016 μg / g and 0. 005 μg / g. The recoveries of lead,cadmium are satisfied with 106. 1% and 96. 0%. The method with high sensitivity was suitable for the determination of actual samples of phosphate rock.