Table 2. Validated method recoveries established for the direct analysis of BPA and its primary metabolic conjugates in amniotic fluid using LC-MS/MS.

Analyte	Recovery (%)
	Within Run (n = 5)			Between Run (n = 15)
	Low 0.5 ng/mL	Med 5 ng/mL	High 20 ng/mL	Low 0.5 ng/mL	Med 5 ng/mL	High 20 ng/mL
BPA	90.5	94.5	94.5	88.0	94.5	93.0
BPA-glucuronide	87.5	90.4	92.0	84.5	89.0	90.2
BPA-sulfate	88.0	92.5	96.5	86.5	90.5	91.5