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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