Faculty of Natural and Agricultural Sciences
School of Physical Sciences
Department of Chemistry
Process Science - Research Output
Research articles in refereed specialist journals:
Venter A, Rohwer ER: 2004. Comprehensive two-dimensional supercritical fluid and gas chromatography with independent fast programmed heating of the gas chromatographic column. Analytical Chemistry, 76, pp 3699-3706.
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.
Mangena SJ, de Korte GJ, McCrindle RI, Morgan DL: 2004. The amenability of some Witbank bituminous ultra fine coals to binderless briquetting. Fuel Processing Technology, 85, pp 1647-1662.
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.
van der Merwe EM, Strydom CA, Botha A: 2004. Hydration of medium reactive industrial magnesium oxide with magnesium acetate. Thermogravimetric study. Journal of Thermal Analysis and Calorimetry, 77, pp 49-56.
van der Merwe EM, Strydom CA: 2004. Quantitative thermogravimetric analysis of binary mixtures. Magnesium hydroxide and magnesium acetate. Journal of Thermal Analysis and Calorimetry, 76, pp 149-156.
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.
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: 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.
van der Merwe EM, Strydom CA: 2004. Purification of South African phosphogypsum for use as Portland cement retarder by a combined thermal and sulphuric acid treatment method. South African Journal of Science, 100 (9&10), pp 411-414.
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.
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.
Beyene NW, van Staden JF: 2004. Sequential injection spectrophotometric determination of phenylephrine hydrochloride in pharmaceutical preparations. Talanta, 63, pp 599-604.
van Staden JF, Taljaard RE: 2004. Determination of Lead(II), Copper(II), Zinc(II), Cobalt(II), Cadmium(II), Iron(III), Mercury(II) using sequential injection extractions. Talanta, 64, pp 1203-1212.
Motalane MP, Strydom CA: 2004. Potential groundwater contamination by fluoride from two South African phosphogypsums. Water SA, 30 (4) / Oct, pp 465-468.
Loubser M, Strydom CA, Potgieter H: 2004. A thermogravimetric analysis study of volatilization of flux mixtures used in XRF sample preparation. X-Ray Spectrometry, 33, pp 212-215.
Patents:
Zimmermann R, Rohwer ER, Dorfner R, Boesl U, Kettrup A: 2004. Gas inlet for reducing a directional and cooled gas jet. (US 6,772,649 B2).
Rohwer ER, Zimmermann R, Heger HJ, Dorfner R, Boesl U, Kettrup A: 2004. Method and device for producing a directed gas jet. (US 6,390,115 B1).
Morgan DL, Kgobane BL, Mthembi PM: 2004. Method of extraction of a carbonaceous material for the subsequent production of graphite. (2003/4856).
Research and technical/policy output for clients:
Nengovhela NR, Strydom CA, Maree JP, Greben HA: Technical Report: 2004. Chemical and biological oxidation of iron in acid mine water. For: Mine Water and the Environment.
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