Determination of Creatine and Creatinine Using a Diamond Paste Based Electrode

2003 ◽  
Vol 31 (2) ◽  
pp. 183-188 ◽  
Author(s):  
Raluca‐Ioana Stefan ◽  
Rahel Girmai Bokretsion
Keyword(s):  
Diamond Paste

Diamond Paste Based Electrodes for the Determination of Iodide in Vitamins and Table Salt

2003 ◽  
Vol 36 (8) ◽  
pp. 1493-1500 ◽  
Author(s):  
Raluca-Ioana Stefan ◽  
Semere Ghebru Bairu ◽  
Jacobus F. van Staden
Keyword(s):  
Table Salt ◽  
Diamond Paste

Diamond Paste Based Electrodes for the Determination of Cr(VI) at Trace Levels

2003 ◽  
Vol 31 (3) ◽  
pp. 261-267 ◽  
Author(s):  
Raluca‐Ioana Stefan ◽  
Semere Ghebru Bairu
Keyword(s):  
Diamond Paste

Diamond Paste Based Immunosensor for the Determination of Azidothymidine

2003 ◽  
Vol 24 (3) ◽  
pp. 319-324 ◽  
Author(s):  
Raluca-Ioana Stefan ◽  
Rahel Girmai Bokretsion
Keyword(s):  
Diamond Paste

Carbon and diamond paste microelectrodes based on Mn(III) porphyrins for the determination of dopamine

2010 ◽  
Vol 668 (2) ◽  
pp. 201-207 ◽  
Author(s):  
Simona Cornelia Balasoiu ◽  
Raluca-Ioana Stefan-van Staden ◽  
Jacobus Frederick van Staden ◽  
Stela Pruneanu ◽  
Gabriel-Lucian Radu
Keyword(s):  
Diamond Paste

Diamond paste-based electrodes for determination of Cr(III) in pharmaceutical compounds

2003 ◽  
Vol 376 (6) ◽  
pp. 844-847 ◽  
Author(s):  
Raluca-Ioana Stefan ◽  
Semere Ghebru Bairu ◽  
Jacobus Frederick van Staden
Keyword(s):  
Pharmaceutical Compounds ◽  
Diamond Paste

Diamond paste based electrodes for the determination of Ag(i)

2010 ◽  
Vol 2 (6) ◽  
pp. 650 ◽  
Author(s):  
Raluca-Ioana Stefan-van Staden ◽  
Semere Ghebru Bairu ◽  
Jacobus F. van Staden
Keyword(s):  
Diamond Paste

Determination of Cadmium(ii), Copper(ii), Mercury(ii), and Lead(ii) in Water Using Stochastic Sensors Based on Graphite and Diamond Paste Modified with 1H-Pyrrole-1-Hexanoic Acid

2018 ◽  
Vol 52 (5) ◽  
pp. 803-812 ◽  
Author(s):  
Raluca-Ioana Stefan-van Staden ◽  
Jacobus Frederick van Staden ◽  
Livia Alexandra Gugoasa ◽  
Luisa-Roxana Popescu-Mandoc
Keyword(s):  
Hexanoic Acid ◽  
Diamond Paste

Microelectrodes based on porphyrins for the determination of ascorbic acid in pharmaceutical samples and beverages

2012 ◽  
Vol 16 (07n08) ◽  
pp. 809-816 ◽  
Author(s):  
Raluca-Ioana Stefan-van Staden ◽  
Simona Cornelia Balasoiu ◽  
Jacobus Frederick van Staden ◽  
Gabriel-Lucian Radu
Keyword(s):  
Ascorbic Acid ◽  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Limits Of Detection ◽  
Pharmaceutical Samples ◽  
Pulse Voltammetry ◽  
Fresh Surface ◽  
Diamond Paste

Different porphyrins were used for the design of seven carbon paste and seven diamond paste based microelectrodes, which were employed for the determination of ascorbic acid in pharmaceutical and beverages samples using differential pulse voltammetry (DPV). The limits of detection lie between 1.1 × 10-14 and 5.1 × 10-7 M while the sensitivities were between 3.07 pA/M and 1285.18 A/M. Ascorbic acid was recovered reliable from pharmaceutical and beverages samples in percentages higher than 92.00% and 91.50%, respectively. The surface of the microelectrodes can easily be renewed by simple polishing, obtaining a fresh surface ready for use in a new assay.

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