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- W1969834083 abstract "Abstract It is demonstrated that 7-chloro-4-nitrobenzo-2-oxa-l,3-diazole (NBD-C1) is a useful dérivatizing agent for the quantification of primary amine containing ingredients in pharmaceutical preparations by spectrophotometric analysis. Colorimetric assay is simpler and eliminates many technical difficulties encountered when employing NBD-C1 dérivat izat ion in fluorometric analysis. The methodology presented is rapid, accurate and free from interferents which accompany other analytical methods for the determination of phenylpropanolamine hydrochloride when in combination with other commonly compounded ingredients such as acetaminophen, caffeine and/or aspirin. Results are presented for the colorimetric method which compare favorably with other appropriate reference methods presented in the literature." @default.
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- W1969834083 date "1986-01-01" @default.
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- W1969834083 title "Spectrophotometric Determination of Phenyxpropanolamine Hydrochloride in Pharmaceuticals after Derivatization with NBD-C1" @default.
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- W1969834083 doi "https://doi.org/10.1080/00032718608064523" @default.
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