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Eleven international standards [U.S.G.S. Standards. G‐2, GSP‐1, AGV‐1 and BCR‐1; C.R.P.G. standards: GA, GH, BR and Mica‐Fe; A.N.R.T. standard: DR‐N; G.S.J. standards: JG‐1 and JB‐1] have been analysed by X‐ray fluorescence for niobium and yttrium. Coefficients for full matrix effect correction are reported.
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Leoni et al. (1976) studied this question.
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