Determination of 17α-Ethynylestradiol-3-Methyl Ether in Tablets by a Colorimetric Assay

Spectrophotofluorometric Determination of Mestranol in Oral Contraceptive Tablets

“…Because of its low dosage in tablets, mestranol is difficult to assay. UV (1)(2)(3), GLC (4-S), and colorimetric (9)(10)(11)(12)(13)(14) methods have been proposed but all lack specificity or are unsuitable for routine analysis.…”

Selective Colorimetric Determination of Ethynodiol Diacetate in Oral Estrogen-Progestin Combination

“…Many analytical techniques such as gas chromatography (1-9, thin-layer chromatography (TLC) (1)(2)(3)(4)(5)(6), UV spectrophotometry (4-6), fluorometry (5,7,8), and colorimetry (5,(8)(9)(10) have been used for the determination of the estrogen component (ethinylestradiol or mestranol) present in the estrogen-progestin tablets and the procedures are abundantly described in literature.…”