King Fahd University of Petroleum and Minerals

Abdel-Nasser Metwally Kawde

Azeem A Rana

Nurudeen Adewale Odewunmi

Mohamed A Morsy

A method of using a graphite electrode to measure a concentration of glucose or methionine from a biological sample is described. A mechanical pencil lead may be used as the graphite electrode, and the biological sample may come from a patient's serum. The glucose or methionine may produce a peak current response within a range of 0.4-0.8 V when the sample is subjected to linear scan voltammetry.

Methionine concentration measurement method

A method of using a graphite electrode to measure a concentration of glucose or methionine from a biological sample is described. A mechanical pencil lead may be used, as the graphite electrode, and the biological sample may come from a patient's serum. The glucose or methionine may produce a peak current response within a range of 0.4-0.8 V when the sample is subjected to linear scan voltammetry.

Detection of serum methionine and glucose by graphite pencil electrode

A method of determining a concentration of phenol and/or a phenol derivative in a first solution. The method includes (a) subjecting a graphite pencil electrode system comprising a graphite pencil working electrode, a counter electrode, and a reference electrode to cyclic voltammetry in a second solution such that a surface of the graphite pencil working electrode is charged by the cyclic voltammetry to form a charged surface, (b) contacting the charged surface of the graphite pencil working electrode with the first solution for sufficient time to electropolymerize the phenol and/or the phenol derivative on the charged surface in open circuit fashion, and (c) determining the concentration of the phenol and/or the phenol derivative in the first solution, wherein the amount of the electropolymerized phenol and/or the electropolymerized phenol derivative formed on the charged surface correlates with the concentration of the phenol and/or the phenol derivative in the first solution.

Electrochemical cell method for determining phenol

Method for determining phenolics concentration

A flow cell and a method for batch and continuous simultaneous electrochemical (EC) and electron paramagnetic resonance (EPR) measurements. The flow cell includes first and second tubes with hollow interiors and the first tube is removably connected to first and second tube assemblies. The interior of the second tube contains first ends of first and second electrodes and a solution comprising an analyte. When a voltage is applied to the second electrode, the analyte undergoes a reduction or an oxidation process to generate radicals, which in turn, give rise to EPR signals.

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Dhahran, Saudi Arabia

Abdel-Nasser Metwally Kawde