Abstract:Three nitroanilines (2-methoxy-4-nitroaniline, 2,4-dinitroaniline and 2-methyl-4-nitroaniline) were tested as spectrophotometric reagents for determination of ethinylestradiol (ETE). The determinations were based on absorbance measurments of the reaction product obtained from the coupling of each diazotized nitroaniline with ETE. Optimization of temperature, pH and diazotization coupling reaction time was realized. 2-Methyl-4-nitroaniline provided the more sensitive system for ETE spectrophotometric determinat… Show more
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