[Determination of trace elements in Niuhuang Jiedu tablets by microwave digestion and ICP-AES].

Niuhuang Jiedu tablets were digested with HNO3-H2O2 system by microwave digestion. The fourteen trace elements of As, Ca, Mg, Al, Mn, Sr, Ba, Se, Ni, Cd, Cu, Zn, Mo and Pb in the solution were determined by ICP-AES. The ICP-AES result proved to be reliable by adding standard recovery experiment to the process. By comparison with the result of chemical experiment, thr present method was accurate, quickly-accessible, and convenient. It was used for Niuhuang Jiedu tablets with result satisfactory.