Nickel in catalytic-cracking feedstocks is determined by atomic-absorption spectrophotometry with no sample preparation other than dilution in p–xylene. A modification of the method of additions permits rapid testing with a detection limit of 0.05 ppm Ni and a precision of 0.05 ppm.
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References
1.
BarrasR. C. and HelwigJ. D., “Rapid Metal Analyses for Plant Control,” Session on Plant and Laboratory Analyzers, 28th Meeting Am. Petrol. Inst., Div. Refining, Philadelphia (May 1963).
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TrentD. and SlavinW., At. Absorption Newsletter3, 131 (1964).
