A Convenient and Sensitive LC-MS/MS Method for Simultaneous Determination of Carbadox- and Olaquindox-Related Residues in Swine Muscle and Liver Tissues

Table 1

Optimum precursor and product ions with the respective collision energy (eV) for MS/MS.

Compound	Q1 (m/z)	Q3 (m/z)	CE (eV)	DP (V)
MQCA	189.1	145.0^a	18	51
		101.9	35	75
QCA	175.3	129.2^a	15	54
		101.9	38	77
DOLQ	232.2	143.2^a	15	51
		102.0	38	85
DCBX	231.1	199.0^a	35	95
		143.2	38	91
MQCA-glycine	246.3	200.1	10	45
		143.2^a	35	90
QCA-glycine	232.1	186.1	10	48
		131.1^a	32	80

^aThe most abundant ion (also used for quantification).