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Rhodium and palladium β-diketonate determination with on-line supercritical fluid extraction-high performance liquid chromatography via solid phase extraction

Abstract

 An on-line system of supercritical fluid extraction (SFE) and high performance liquid chromatography (HPLC) via solid phase extraction (SPE) is described for the determination of palladium and rhodium 2,2,6,6-tetramethyl-3,5-heptanedione-(thd) as well as rhodium-acetylacetonate-(acac) and benzylacetonate-(bzac) chelates. The chelates were extracted with supercritical CO2 from sand and humic acid, concentrated on SPE cartridges and analysed with HPLC. Two cartridge materials were tested and compared to off-line trapping. The percentage of the breakthrough and cartridge retained material were measured in liquid dichloromethane. The SFE conditions could be optimized to separate metal chelates during the extraction. The supercritical fluid (SF) behaviour of different ligands on rhodium were investigated.

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Received: 19 July 1996/Revised: 11 December 1996/Accepted: 14 December 1996

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Wenclawiak, B., Hees, T., Zöller, C. et al. Rhodium and palladium β-diketonate determination with on-line supercritical fluid extraction-high performance liquid chromatography via solid phase extraction. Fresenius J Anal Chem 358, 471–474 (1997). https://doi.org/10.1007/s002160050448

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  • DOI: https://doi.org/10.1007/s002160050448

Keywords

  • Chromatography
  • High Performance Liquid Chromatography
  • Liquid Chromatography
  • High Performance Liquid Chromatography
  • Palladium