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Retention behaviour of metal chelates in ion-pair reversed-phase liquid chromatography as a function of mobile phase composition with methanol-water and acetonitrile-water mobile phases

✍ Scribed by Chizuko Ohtsuka; Kimiyo Matsuzuwa; Hiroko Wada; Genkichi Nakagawa

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
517 KB
Volume
294
Category
Article
ISSN
0003-2670

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✦ Synopsis

The retention behaviour of Cu(II), Co(III), Nit111 and Fe(H) chelates with 2-(5-bromo-2-pyridylaaol-S-[ N-propyl-N-(3-sulphopropylktminolphenol (5Br-PAPS) and 2_(5-nitro-2-pyridylazo)-5-[N-propyl-N-(3-sulphopropyl)amino]phenol (nitro-PAPS) in ion-pair reversed-phase liquid chromatography was examined with mobile phases of methanol-water and a&o&rile-water binary systems containing 0.05 M sodium ion and 0.02 M Tris buffer (pH 7

). The correlation of log k' with the solubility parameter was different between the methanol-water and acetonitrilewater systems. The resolution among chelates and reagents was complete with the acetonitrile-water system and far better than with the methanol-water system.

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