Analysis of nickel-base and cobalt-base heat-resistant alloys by single column anion exchange chromatography and inductively coupled plasma-atomic emission spectrometry

Single-column anion exchange chromatography has been combined with inductively coupled plasma-atomicemission spectrometry (ICP-AES). A complex Ni-base or Co-base heat-resistant alloy was dissolved in a mixed acid containing hydrofluoric acid. A strongly basic anion exchange resin was used to separate the alloying elements. Hydrofluoric acid was removed by fuming or was masked after elution in order to use a glass sample introduction system for the ICP-AES. Thirteen alloying elements were determined in Ni-base and eleven in Co-base heat-resistant alloys. Good results were obtained by both the calibration curve method and the internal standard method. Synthetic standard solutions were used for the calibration. Magnesium was used as an internal standard element.