Fuel Markers and Methods of Producing and Using Same

摘要

A composition comprising a fuel and at least one compound characterized by Formula I:;;wherein X is carbon, oxygen, or sulfur; R1 and R2 each independently are hydrogen, a C1 to C20 alkyl, or a C6 to C10 aryl; R3 and R3′ each independently are hydrogen or a C1 to C4 alkyl; R4 and R4′ each independently are hydrogen, a C1 to C4 alkyl, a C4 to C10 cycloalkyl, or a C6 to C10 aryl; R5 and R5′ each independently are a C4 to C10 alkyl; R6 and R6′ each independently are hydrogen or a C1 to C6 alkyl; and R7 and R7′ each independently are hydrogen or a C1 to C4 alkyl; and wherein the compound of Formula I when subjected to GC-MS using electron ionization at greater than about 70 eV produces at least one ion having a mass-to-charge ratio of from 300 to 600.

主权项

1. A composition comprising (a) a fuel and (b) at least one compound characterized by Formula I: wherein X can be carbon (C), oxygen (O), or sulfur (S); R1 and R2 can each independently be hydrogen, a C1 to C20 alkyl group, or a C6 to C10 aryl group; R3 and R3′ can each independently be hydrogen or a C1 to C4 alkyl group; R4 and R4′ can each independently be hydrogen, a C1 to C4 alkyl group, a C4 to C10 cycloalkyl group, or a C6 to C10 aryl group; R5 and R5′ can each independently be a C4 to C10 alkyl group; R6 and R6′ can each independently be hydrogen or a C1 to C6 alkyl group; and R7 and R7′ can each independently be hydrogen or a C1 to C4 alkyl group; and wherein the compound characterized by Formula I when subjected to gas chromatography-mass spectrometry (GC-MS) using electron ionization produces at least one ion having a mass-to-charge ratio of from about 300 to about 600 at an ionization energy of equal to or greater than about 70 eV.