Determination of Copper,Manganese,Silicon in Ferrotungsten by Inductively Coupled Plasma Atomic Emission Spectrometry

An inductively coupled plasma atomic emission spectrometric(ICP-AES) method for the determination of Cu,Mn,Si in the ferrotungsten was studed.The optimal working conditions of instrument were confirmed.The experiment factors including the method for dissolving sample,spectral line of element,and oxalic acid concentration were discussed.The sample was discomposed by oxalic acid-hydrogen peroxide.Throuth selectiong 327.396 nm,279.482 nm and 251.612 nm as the analytical lines of copper,manganese and silicon and adopting appropriate background correction points in oxalic acid medium,matrix elements W,Fe and other coexistent elements have no effect in the determination.So Cu,Mn,Si could be determined directly without separation.The detection limits for Cu,Mn,Si were 0.005 2 μg/mL,0.007 2 μg/mL,0.009 0 μg/mL respectively.This method could be employed in simultaneous determination of Cu,Mn,Si in ferrotungsten,with the RSDs of 0.47%-1.98%.



 

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