Survey of Octylphenol, Nonylphenol, and Bisphenol A in Infant Milk Powders by Solid-Phase Extraction Combined GC/MS Method

Table 1

Chromatographic parameters of standard phenol compounds.

Number	Compounds	Retention time	Qualifier ions	Quantifier ions
1	D16-BPA	13.34	616	624
2	4-OP	10.67	402, 316, 275	303
3	4-NP	11.76	416, 275, 250	303
4	BPA	13.42	620, 331, 315	605

4-OP, 4-NP, and BPA were all quantified by D₁₆-BPA as the inner standards method.