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Extraction and spectrophotometric determination of nickel based on the formation of a ternary complex with cadion and 1,10-phenanthroline

Extraktion und spektrophotometrische Bestimmung von Nickel mit Cadion und 1,10-Pbenanthrolin als ternärer Komplex

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Summary

A sensitive and selective spectrophotometric method has been developed for the determination of nickel, based on the formation of red ternary complex of nickel with cadion and 1,10-phenanthro- line in alkaline solution (0.5N NaOH). The complex is quantitatively extracted by chloroform and exhibits an absorption maximum at 505 nm. Beer's law is obeyed in the concentration range of 0–2.5μg of Ni(II)/5 ml chloroform. The Sandell sensitivity and molar absorptivity of the reaction are 0.000587μg cm−2 and 1.0×l05l· mol−1·cm−1, respectively. The method has been applied to the determination of nickel in alloy steels, aluminium alloys and soils.

Zusammenfassung

Eine empfindliche und selektive Methode zur Bestimmung von Nickel mit Cadion und 1,10-Phenanthrolin wurde ausgearbeitet. Sie beruht auf der Bildung eines roten ternären Komplexes in alkalischer Lösung (0.5N NaOH). Bei 505 nm entspricht die Färbung dem Beerschen Gesetz zwischen 0 und 2,5μg Ni(II)/5 ml Chloroform. Der Komplex läßt sich mit Chloroform extrahieren. Die Empfindlichkeit der Reaktion beträgt 0,000587μg· cm−2 und die molare Absorption 1.0×105l·mol−1·cm−1. Die Bestimmung von Nickel in Stahl, Aluminiumlegierungen und Böden ergab zufriedenstellende Resultate.

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Nai-Kui, S., Fu-Sheng, W., Qi-Ping, Q. et al. Extraction and spectrophotometric determination of nickel based on the formation of a ternary complex with cadion and 1,10-phenanthroline. Mikrochim Acta 80, 405–414 (1983). https://doi.org/10.1007/BF01202018

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  • DOI: https://doi.org/10.1007/BF01202018

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