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.
Standard Oil Company of California, Richmond, California; present address: Perkin-Elmer Corp., San Francisco, Calif.
Publication date: July 1, 1966
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