Standard samples and methods of instrumental measurement of Saybolt color of petroleum products using said samples
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United States of America Patent
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Aug 18, 1992
Grant Date -
N/A
app pub date -
Aug 22, 1991
filing date -
Aug 30, 1990
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Expired
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Abstract
A standard sample for use in an instrumental measurement of Saybolt color of a petroleum product with a photoelectric colorimeter, which comprises a mixed solution of 1-(phenylazo)-2-naphthalenol, 3-methyl-1-phenyl-4-(phenylazo)-pyrazol-5-ol and 1,4-bis(butylamino)-9,10-anthracenedione each as a colorant, 1-phenyl-1-xylylethane as a solvent for said colorants and dodecene as a diluent, and a method of instrumental measurement of Saybolt color of a petroleum product, which comprises calibrating a photoelectric colorimeter with the standard sample.
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