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Simultaneous TLC–densitometric determination of tamoxifen citrate and medroxyprogesterone acetate and UV‐degradation kinetic study of medroxyprogesterone acetate
Author(s) -
Saleh Gamal A.,
Abdelaal Fatma A.M.,
Abbas Noha S.
Publication year - 2018
Publication title -
biomedical chromatography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 65
eISSN - 1099-0801
pISSN - 0269-3879
DOI - 10.1002/bmc.4366
Subject(s) - chemistry , medroxyprogesterone acetate , chromatography , medroxyprogesterone , acetic acid , silica gel , hormone , biochemistry
Coadministration of tamoxifen citrate (TMC) and medroxyprogesterone acetate (MPA) is preferred to increase the response rate and the percentage recovery in patients with endometrial carcinoma. Administration of TMC and MPA and their combination affects estrogen and progestin receptor concentrations in advanced endometrium carcinoma by affecting 17 β ‐hydroxyl steroid dehydrogenase activity and serum hormone concentrations. A sensitive, accurate and robust thin‐layer chromatography method has been established for simultaneous analysis of TMC and MPA. Method development was carried out on silica gel F 254 using butanol–acetic acid–water (6:0.5:0.5, v/v/v) as mobile phase. Densitometric scanning was carried out at 241 nm for simultaneous detection of TMC and MPA. Retardation factor (R f ) values for TMC and MPA were 0.21 and 0.85, respectively. The method was validated according to ICH guidelines. Regression plots revealed linear relationships in the concentration range of 50–500 and 25–250 ng/band for TMC and MPA, successively. Accuracy was ≥99.60 and 98.72% for TMC and MPA, respectively. Forced degradation studies using UV photodegradation was applied on MPA after exposure to UV light for different times and applying a kinetic study for calculating the degradation rate constant ( k ) and half‐life time ( t 1/2 ).