Simultaneous Determination of Hormonal Residues in Treated Waters Using Ultrahigh Performance Liquid Chromatography-Tandem Mass Spectrometry

Table 1

List of hormonal compounds, pK_a values, chemical structure, and retention times.

Compound		pKa [21]	Structure	𝑡𝑅 (min)
E3	Estriol	10.3		0.96
E2	17β-estradiol	10.3		2.18
EE	17α-ethinylestradiol	10.3		2.23
E1	Estrone	10.3		2.20
DES	Diethylstilbestrol	10.2		2.35
TES	Testosterone	15.1		2.40
MGA	Megestrol acetate			3.06
NOR	Levonorgestrel	13.1		2.63