Quality control of analyses of mercury in hair |
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| Authors: | B Lind L Bigras E Cernichiari T W Clarkson L Friberg M Hellman P Kennedy J Kirkbride T Kjellstr?m and B Ohlin |
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| Institution: | (1) Department of Chemical Engineering, ETSEIB, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain |
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| Abstract: | Summary Flow injection analysis (FIA) has been combined with a dialysis unit in order to study the effect of interferences in the determination of free cyanide in waste water. Two kinds of interferences, metals and inorganic anions, were studied. In all the cases, solutions of constant cyanide concentration containing interferences were introduced in the FIA system and free cyanide was determined after hydrogen cyanide passes the dialysis membrane.Results reveal the advantages of this methodology for Zn(II), Cu(I), Cd(II), Nr
4
+
and inorganic anions. Fe(III), Co(II), Ni(II) and carbonate show different behaviour under these conditions.
Entfernung von Störungen bei der spektralphotometrischen Cyanidbestimmung unter Verwendung von Dialyse und Fließinjektion
Presented at Euroanalysis VI, Paris, September 8–11, 1987 |
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