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A brief study of the supercritical fluid chromatographic behavior of lanthanide β-diketonates

✍ Scribed by Laintz, Kenneth E. ;Iso, Shuichi ;Meguro, Yoshiro ;Yoshida, Zenko

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
432 KB
Volume
17
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

The chromatographic behaviors of lanthanide chelates of acetylacetone (ACAC), trifluoroacetylacetone (TFA), thenoyltrifluoroacetone (TTA), dipivaloylmethane (THD), 6,6,7,7,8,8,8‐heptafluoro‐2,2‐dimethyl‐3,5‐octanedione (FOD), and the thenoyltrifluoroacetonepyridine (TTA·Py) adduct were investigated using packed column supercritical fluid chromatography. Mobile phases consisting of neat and alcohol modified CO~2~ were used with a phenyl packed stationary phase. Lanthanide complexes of ACAC, THD, and FOD were shown to have better chromatographic performance compared to the corresponding chelates with TFA, TTA, and TTA·Py. In particular, TTA complexes such as Eu(TTA)~3~ showed characteristic thermal decomposition in the mobile phase at elevated temperature. In addition, retention behavior was found to be a temperature dependent function of volatility and solubility for all chelates studied.

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