Abstract
Examination of a wide range of metal dialkyldithiophosphates has shown that the diethyl and diisopropyl derivatives of nickel, palladium, platinum, chromium and rhodium can be successfully eluted by gas chromatography on inert diatomaceous-earth supports such as Gas-Chrom Q or Chromosorb 750 coated with silicone stationary phases OV-101, SE-30 or PS-300. The corresponding zinc chelates, although volatile, display considerable tailing on all columns tested, and it is proposed that this phenomenon may be due to the presence of dimeric species in the gas phase. Thermal analysis of other metal dialkyldithiophosphates show them to be non-volatile and unsuitable for gas chromatography.
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