Ethinylestradiol assay according to the Chinese Pharmacopoeia

 1- Mobile phase preparation :

- Eluent (A) : Methanol

- Eluent (B) : Water

- Eluent (A) : Eluent (B)

            70   :   30

2- Column : Acclaim 120 C18

( 25 cm x 4.6 mm x 5 µm )

3- Column oven temp. : 25 °C

4- Detector : UV 220nm

5- Injection volume : 10 µL

6 - Chromatogram :


Peak 2 : Ethinylestradiol

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