Table 1. The urine-based calibration curve of each MPAE and their LOD and LOQ.

MPAEs	Calibration curve	R2	LOD(ng/ml)	LOQ(ng/ml)
MMP	Y = 0.0626X-0.0821	0.9984	0.5	1.5
MEP	Y = 0.0038X-0.0413	0.9934	0.5	1.5
MBP	Y = 0.0079X-0.0538	0.9997	0.5	1.5
MBzP	Y = 0.005X+0.0185	0.9996	0.5	1.5
MEHP	Y = 0.0609X+1.1775	0.9956	0.3	1.0
MOP	Y = 0.0284X+0.2017	0.9990	0.3	1.0

Note: Y represents concentration of MPAE in urine and X represents the peak area ratio of each MPAEs/MPAEs-D4