Copper agent-MIBK system is established to extract the sample, then to determine the trace lead, cadmium, nickel and copper by flame atom absorption.

• 建立了用铜试剂-MIBK系统对样品进行萃取，再用火焰原子吸收法测定多聚磷酸中痕量铅、镉、镍、铁和铜的方法。