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Photometric determination of molybdenum in iron and steels using tin(II) chloride in nonaqueous solvent

Photometrische Bestimmung von Molybdän in Eisen und Stahl mit Hilfe von Zinn(II)-chlorid in nichtwäβrigem Medium

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Zusammenfassung

Das vorgeschlagene Verfahren beruht auf Bildung des Thiocyanatkomplexes unter Verwendung von Zinn(II)-chlorid als Reduktionsmittel [in Glycerin/Äthanol (3∶1) oder Diäthylenglykol]. Als Extraktionsmittel dient n-Butylacetat. Das Beersche Gesetz wird im Bereich 0,2–80 μg Mo/l befolgt. Der kleinste photometrische Fehler beträgt 3,2%, die molare Extinktion 15640 bei 470 nm und der optimale Konzentrationsbereich 0,6–6 μgMo/l.

Summary

A new procedure is proposed for the photometric determination of molybdenum in iron and steels using thiocyanate and tin(II) chloride solution [in glycerol-ethannol (3∶1) or in diethylenglycol] as a reducer and extraction with n-butyl acetate. Beer's law is obeyed between 0.2 and 80 μg Mo/ml. The minimum photometric error is 3.2%, the molar absorptivity is 15640 at 470 nm and the best concentration range for determination is between 0.6 and 6 μg Mo/ml.

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Bermejo-Martínez, F., Latas-Pérez, P. Photometric determination of molybdenum in iron and steels using tin(II) chloride in nonaqueous solvent. Z. Anal. Chem. 264, 139–142 (1973). https://doi.org/10.1007/BF00424627

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  • DOI: https://doi.org/10.1007/BF00424627

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