Abstract
We developed a procedure that can effectively separate and determine precious metal ions, such as Ag(I) and Pd(II), in some samples with reverse phase ion-pair high performance liquid chromatography, employing indirect spectrophotometric detection method of their tetrathiacrown ether complexes. Eluting the solutions of the metal-thiacrown ether complexes with a MeCN-waterr mobile phase(pH 2.20 adjusted with CH2ClCOOH buffer) containing 0.000-0.025M sodium dodecyl sulfate(SDS) and 1.0x10-4M sodium 1-naphthalene sulfate(SNS) through μ-Bondapak CN column, the elution behaviors were elucidated as ion-pairing in case of [SDS]<0.010M and micelle forming in case of [SDS]>0.010M. As three applications, Ag(I) ion in black-white photographic fixing solution, Pd(II) ion in an artificial sea water and palladium metal in a catalyst for the clean up of car exhaust gases were analyzed in the optimum condition.
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