Determination of Major,Minor and Trace Elements in Manganese Ores by Alkali Fusion-ICP-AES

A method has been established for the simultaneous determination of major,minor and trace elements in manganese ores by inductively coupled plasma-atomic emission spectrometry(ICP-AES).Manganese ore samples were dealt with alkali fusion and leached out with HCl.After selecting the optimal analytical lines of the detected elements,the experimental conditions,including amounts of sample uptake,carrier gas pressure,RF power and coolant gas flow were optimized using SeaSpray nebulizer and cyclone spray chamber.The matrix and acid effects were also investigated.The results indicated that in the presence of high concentration of easily ionized sodium(3.5 g/L) the effects between the elements could be ignored and that the net intensity of the determined element decreased with the increase of acidity.This method was applied to the determination of standard reference materials.The results showed that the found levels agreed quite well with the certified values for Mn,Fe,Si,Al,Ca,Ba,Mg,K,Cu,Ni,Zn,P and Ti,with RSD(n=7) ranging from 0.1% to 6.8%.Recoveries for Co,Cr,V,As and Pb were in the range of 92%-110% with RSD(n= 7) of 0.1%-3.4%.The proposed method can highly improved the efficiency of determinating the multi-elements in manganese ores.