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US 12,181,435 B2Granted
Methionine concentration measurement method
AssigneeKing Fahd University of Petroleum and Minerals
InventorsAbdel-Nasser M. Kawde, Nurudeen Adewale Odewunmi
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Abstract
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.
Claims15
A methionine concentration measurement method, comprising:
- measuring a current response of an aqueous sample comprising methionine at a voltage of 0.4-0.8 V, wherein the measuring is conducted in an electrochemical cell with a graphite electrode, a reference electrode, and a counter electrode;
- and
- determining the concentration of the methionine in the aqueous sample by comparing the current response to a correlation chart,
- wherein the methionine is present in the aqueous sample at a concentration of 1.0 μM-10.0 mM,
- wherein the aqueous sample comprises an inorganic base at a concentration of 0.02-1.0 M and a metal salt at a concentration of 0.1-10 ppm,
- wherein the metal salt comprises at least one metal ion selected from the group consisting of Cu2+, Ag+, Zn2+, Fe2+, and Fe3+.
3 more elements
Dependencies are inferred from the claim text.