Markers for petroleum, method of tagging, and method of detection.

摘要

Liquid petroleum products are tagged with a marker which is a compound or mixture of compounds having the formula: wherein R<2> is C1-C6 alkyl, and R<2> and R<3> are nothing or -O-(C1-C3 alkyl). The marker or markers can be detected by extraction from the liquid petroleum product with a mixture of 20 to 100 vol.% of an aqueous solution of up to 10 wt.% NaOH or KOH and up to 80 vol.% of a water-soluble organic cosolvent.