Analysis method of diene compound

A method for quantifying a diene compound, comprising:

• a triazolinedione adduct heating step of heating a triazolinedione adduct represented by formula (1) to produce a triazolinedione compound represented by formula (2);
• an ene compound formation step of reacting the triazolinedione compound with a diene compound represented by formula (3) to obtain an ene compound represented by formula (4);
• and
• an ene compound quantifying step of quantifying the ene compound to quantify the diene compound,
• wherein in the formula (1), R1 represents an organic group;
• and A represents a fused ring having three or more rings comprising at least one aromatic ring,
• wherein in the formula (2), R1 is as defined in the formula (1),
• wherein in the formula (3), R2, R3, R4, R5, R6, and R7 each independently represent a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 100 carbon atoms, an aralkyl group, a phenyl group, and a heterocyclic group, wherein the alkyl group, the aralkyl group, the phenyl group, and the heterocyclic group optionally comprise an atom selected from the group consisting of an oxygen atom, a nitrogen atom, a sulfur atom, and a phosphorus atom, and wherein two or more of R2, R3, R4, R5, R6, and R7 are optionally combined with one another, and
• wherein in the formula (4), R1 is as defined in the formula (1);
• and R2, R3, R4, R5, R6, and R7 are as defined in the formula (3).