Determination of Lead Isotopic Ratios in Original KOSA Soils by Inductively Coupled Plasma Mass Spectrometry

Five original KOSA soils,collected in the locations of being thought to be the origins of KOSA aerosol in China,were analyzed by inductively coupled plasma mass spectrometry (ICP-MS) to determine the lead isotope ratios ²⁰⁷Pb/²⁰⁶Pb and ²⁰⁸Pb/²⁰⁶Pb.Tominimize mass bias and drift in Pb isotope measurement,the mass discrimination correction,based upon the addition of thallium to the samples and measurement of ²⁰⁵Tl/²⁰³Tl ratio,was used.At the same the, concentrations of 12 elments were determined as a function of particle-size by ICP-MS and induedvely coupled plasma atomic emission spectrometry (ICP-AES).