TABLE 1.

Relative retention times of trimethylsilyl derivatized CHMs

Compound	Relative RTa
TCHQ	1.000
TriCHQ	0.699
2,6-DCHQ	0.539
2,5-DCHQ	0.524
2,3-DCHQ	0.575
2-CHQb	0.453
HQ	0.392
TCMP	0.762
2,3,6-TriCMP	0.645
2,3,5-TriCMP	0.563
2,5-DCMP	0.483
3,5-DCMPb	0.455
2,3-DCMP	0.526
2,6-DCMP	0.481
2-CMP	0.412
4-MP	0.352
TCDB	0.600

^aRetention time (RT) relative to TCHQ, defined as 1.000.

^b2-CHQ and 3,5-DCMP achieve baseline separation (not shown) with an alternate GC-MS method (see Materials and Methods).