Abstract:
:A rapid difference spectrophotometric assay of 5-hydroxymethylfurfuraldehyde (5-HMF) in certain degraded syrups is described. The method involves the measurement of the difference absorbance at 340 nm of the isonicotinoyl hydrazone of 5-HMF, formed at room temperature in an acidic solution of isoniazid, relative to an equimolar solution of 5-HMF, which has been reduced by sodium borohydride, and isoniazid reagent. The procedure is accurate, precise and selective for 5-HMF in the syrups examined. The limits of detection and determination are 0.91 mug ml(-1) and 12.4 mug ml(-1), respectively. The method has been applied to codeine linctus, paracetamol elixir (paediatric) opiate squill linctus, ipecacuanha and squill linctus, Phensedyl Linctus and invert syrup.
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Davidson AG,Dawodu TOdoi
10.1016/0731-7085(88)80030-xsubject
Has Abstractpub_date
1988-01-01 00:00:00pages
61-6issue
1eissn
0731-7085issn
1873-264Xpii
0731-7085(88)80030-Xjournal_volume
6pub_type
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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journal_title:Journal of pharmaceutical and biomedical analysis
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abstract::Phytochemical investigation of the methanolic extract of Byrsonima crassifolia's bark led to the isolation of 8 known phenolic compounds 5-O-galloylquinic acid, 3-O-galloylquinic acid, 3,4-di-O-galloylquinic acid, 3,5-di-O-galloylquinic acid, 3,4,5-tri-O-galloylquinic acid, (+)-epicatechin-3-gallate along with (+)-cat...
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journal_title:Journal of pharmaceutical and biomedical analysis
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