Determination of copper and sodium in catalysts by MPT-AES with a pneumatic nebulizer sample introduction system

In this paper,a method for the determination of copper and sodium in catalysts was studied by microwave plasma atomic emission spectrometry(MPT-AES) with a pneumatic nebulizer sample introduction system.Optimization of the experimental parameters was performed.The effects of coexistent ions(K(Ⅰ),Na(Ⅰ),Al(Ⅲ), Cu(Ⅱ),etc) on the determination of copper and sodium were investigated.Pressure vessel was explored in this paper.Further more,standard addition method was used to overcome matrix effect.The results show that the detection limits for copper and sodium are 2.0 and 4.2 μg/L,respectively;the relative standard deviation(RSD) is less than 2.2%;the linear range are 0.01～12.0 mg/L and 0.02～8.0 mg/L,respectively.The recoveries are between 96.1% and 102%.