Rapid measurement and evaluation of the effect of drying conditions on harpagoside content in Harpagophytum procumbens (devil's claw) root

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dc.contributor.authorJoubert E.
dc.contributor.authorManley M.
dc.contributor.authorGray B.R.
dc.contributor.authorSchulz H.
dc.date.accessioned2011-05-15T15:56:52Z
dc.date.available2011-05-15T15:56:52Z
dc.date.issued2005
dc.description.abstractThe effect of drying conditions on harpagoside (HS) retention, as well as the use of near-infrared spectroscopy (NIRS) for rapid quantification of the iridoids, HS, and 8-ρ-coumaroyl harpagide (8ρCHG) and moisture, in dried Harpagophytum procumbens (devil's claw) root was investigated. HS retention was significantly (P < 0.05) lower in sun-dried samples as compared to tunnel-dried (60 °C, 30% relative humidity) and freeze-dried samples. The best retention of HS was obtained at 50 °C when evaluating tunnel drying at dry bulb temperatures of 40, 50, and 60 °C and 30% relative humidity. NIRS can effectively predict moisture content with a standard error of prediction (SEP) and correlation coefficient (r) of 0.24% and 0.99, respectively. The HS and 8ρCHG NIRS calibration models established for both iridoid glucosides can be used for screening purposes to get a semiquantitative classification of devil's claw roots (for HS: SEP = 0.236%, r = 0.64; for 8ρCHG: SEP = 0.048%, r = 0.73). © 2005 American Chemical Society.
dc.description.versionArticle
dc.identifier.citationJournal of Agricultural and Food Chemistry
dc.identifier.citation53
dc.identifier.citation9
dc.identifier.issn218561
dc.identifier.other10.1021/jf047930c
dc.identifier.urihttp://hdl.handle.net/10019.1/10084
dc.subjectglycoside
dc.subjectharpagoside
dc.subjectpyran derivative
dc.subjectarticle
dc.subjectchemistry
dc.subjectcomparative study
dc.subjectdesiccation
dc.subjectfreeze drying
dc.subjectHarpagophytum
dc.subjectmethodology
dc.subjectpharmaceutics
dc.subjectplant root
dc.subjectsunlight
dc.subjecttemperature
dc.subjectDesiccation
dc.subjectFreeze Drying
dc.subjectGlycosides
dc.subjectHarpagophytum
dc.subjectPlant Roots
dc.subjectPyrans
dc.subjectSunlight
dc.subjectTechnology, Pharmaceutical
dc.subjectTemperature
dc.subjectHarpagophytum
dc.subjectHarpagophytum procumbens
dc.titleRapid measurement and evaluation of the effect of drying conditions on harpagoside content in Harpagophytum procumbens (devil's claw) root
dc.typeArticle
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