Faculty of Natural and Agricultural Sciences
School of Physical Sciences
Department of Chemistry
Stefan-van Staden, R-I
BSc MSc (Academy of Music Bucharest); BSc PhD (University of Bucharest) - Senior Lecturer
NRF Rating: P
Contact Details
Research Interests
Research Output
Contact Details:
Telephone number: 012 420 2510
Fax number: 012 362 5297
E-mail address: raluca.stefan@chem.up.ac.za
Research Interests:
Process Science
Research Output:
Research articles in refereed specialist journals:
Ratsko AA, Stefan-van Staden R-I: 2004. Teicoplanin-based enantioselective, potentiometric membrane electrodes for the determination of R-baclofen in pharmaceutical formulations. Analytical Letters, 37 (15), pp 3161-3173.
Ozoemena KI, Stefan-van Staden R-I, Nyokong T: 2004. Determination of 2',3'-dideoxyinosine using iron(II) phthalocyanine modified carbon paste electrode. Analytical Letters, 37 (13), pp 2641-2648.
Stefan-van Staden R-I, Nejem RM, van Staden JF, Aboul-Enein HY: 2004. Enantioselective, potentiometric membrane electrodes for the determination of L-pipecolic acid in serum. Electroanalysis, 16 (20), pp 1730-1733.
Ratsko AA, Stefan-van Staden R-I: 2004. Determination of baclofen enantiomers in pharmaceutical formulations using maltodextrin-based enantioselective, potentiometric membrane electrodes. Il Farmaco, 59, pp 993-997.
Stefan-van Staden R-I, Nejem RM: 2004. Determination of L- and D-pipecolic acids using a diamond paste based electrode. Instrumentation Science & Technology, 32 (3), pp 311-320.
Ozoemena KI, Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Enantioselective, potentiometric membrane electrode, based on vancomycin as chiral selector, for the assay ofS-perindopril. Instrumentation Science & Technology, 32 (4), pp 371-378.
Ratsko AA, Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Macrocyclic antibiotics as chiral selectors in the design of enantioselective, potentiometric membrane electrodes. Instrumentation Science & Technology, 32 (6), pp 601-610.
Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Determination of (+)-3,3',5-Triiodo-L-thyronine (L-T3) from serum using a Sequential Injection Analysis / Immunosensor System. Journal of Immunoassay & Immunochemistry, 25 (2), pp 183-189.
Stefan-van Staden R-I, van Staden JF, Bala C, Aboul-Enein HY: 2004. On-line assay of theS-enantiomers of enalapril, ramipril and pentopril using a sequential injection analysis/amperometric biosensor system. Journal of Pharmaceutical and Biomedical Analysis, 36, pp 889-892.
Stefan-van Staden R-I, Nejem RM, van Staden JF, Aboul-Enein HY: 2004. New amperometric biosensors based on diamond paste for the assay of L- and D-pipecolic acids in serum samples. Preparative Biochemistry & Biotechnology, 34 (2), pp 135-143.
Ozoemena KI, Stefan-van Staden R-I: 2004. Enantioselective, potentiometric membrane electrodes based on maltodextrins. Their applications for the determination of L-proline. Sensors and Actuators B-Chemical, 98 (1), pp 97-100.
Ratsko AA, Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Enantioselective, potentiometric membrane electrode based on vancomycin. Its application for the determination of D-pipecolic acid. Sensors and Actuators B-Chemical, 99, pp 539-543.
Ozoemena KI, Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Utilization of maltodextrin based enantioselective, potentiometric membrane electrodes for the enantioselective assay of S-perindopril. Talanta, 62 (4), pp 681-685.
Stefan-van Staden R-I, Bairu SG: 2004. Diamond paste based electrodes for the determination of Pb(II) at trace concentration levels. Talanta, 63, pp 605-608.
Ratsko AA, Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Determination of L-carnitine using enantioselective, potentiometric membrane electrodes based on macrocyclic antibiotics. Talanta, 63, pp 515-519.
Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Simultaneous determination of L-thyroxine (L-T4), D-thyroxine (D-T4), and L-triiodothyronine (L-T3) using a sensors/sequential injection analysis system. Talanta, 64, pp 151-155.
Ratsko AA, Stefan-van Staden R-I, van Staden JF, Aboul-Enein HY: 2004. Macrocyclic antibiotics as chiral selectors in the design of enantioselective, potentiometric membrane electrodes for the determination of L- and D-enantiomers of methotrexate. Talanta, 64, pp 145-150.
Tesfaldet ZO, van Staden JF, Stefan-van Staden R-I: 2004. Spectrophotometric determination of magnesium in pharmaceutical preparations by cost-effective sequential injection analysis. Talanta, 64, pp 981-988.
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