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AuthorHassan ,Saad S. M.
AuthorElnemma ,Eman M.
AuthorEl-Naby ,Eman H.
Available date2024-03-04T08:58:29Z
Publication Date1999
Publication NameAnalytical Letters
ResourceScopus
ISSN0003-2719
URIhttp://dx.doi.org/10.1080/00032719908542820
URIhttp://hdl.handle.net/10576/52641
AbstractThe potentiometric performance characteristics of microelectronically fabricated solid-state planar ethylmorphine sensors based on silicon/silicon nitride substrate and a mixture of ethylmorphine-tetraphenylborate and potassium tetrakis(p-chlorophenyl)borate as ion exchangers in a plasticized PVC matrix are described. Sensors incorporating dibutylsebacate and dioctylphthalate plasticizers display linear and stable near-Nernstian responses for ethylmorphine concentrations over the range 1x10−2 - 4.5x10−5 M and 1x10−2 - 2.5x10−5 M with calibration slopes of 53.1±0.8 and 57.1±0.8 mV/decade, respectively. The lower limit of detection is 1 μg/ml. The working pH range is 2.5-6:5 and the selectivity of the sensors for ethylmorphine is substantially higher with respect to a large number of opiate derivatives, amines, amides, amino acids and inorganic cations. The sensors are used for direct potentiometry and potentiotitrimetry of ethylmorphine in aqueous solutions and in pharmaceutical preparations. Results with an average recovery of 98.2% and a mean standard deviation of 1.2% are obtained.
Languageen
PublisherMarcel Dekker Inc.
SubjectEthylmorphine
Pharmaceutical analysis
Planar sensors
Potentiometry
Solid-state electrode
TitleSolid-state planar microsensors for selective potentiometric determination of ethylmorphine
TypeArticle
Pagination271-285
Issue Number2
Volume Number32
dc.accessType Abstract Only


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