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The immobilisation of iron-substituted heteropolytungstates [(H2O)FeIIIXW11O39]n–(X = P, n= 4; X = Si, n= 5) in poly(N-methylpyrrole) films deposited on an electrode surface provides a sensitive assembly for the electrochemical detection of nitrite.
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Fabre et al. (1994) studied this question.
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