Direct determination of nickel in xylene solutions of raw material for catalytic cracking with application of graphite furnace atomic absorption spectrometry

CATEGORY: CRUDE OIL ANALYSIS
Anal. Methods, 2013,5, 192-201, DOI: 10.1039/C2AY25920F
Direct determination of nickel in xylene solutions of raw material for catalytic cracking with application of graphite furnace atomic absorption spectrometry
Zofia Kowalewska
Nickel is a severe poison to cracking catalysts.  Author proposes a quick yet reliable method of Ni determination with a detection limit of 1.2 μg kg⁻¹ in the initial sample at 1 : 5 dilution m/v.
The method relies on sample dilution in xylene and Ni determination using graphite furnace atomic absorption spectrometry, with palladium acetylacetonate and air ashing as a double modifier. The method was validated using mineralization as an alternative sample preparation procedure.
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