Portable system for determining monoethylene glycol
AssigneesPetroleo Brasileiro S.A. - Petrobras, Universidade Federal De GoiáS - Ufg
InventorsKariolanda Cristina De Andrade Rezende, Wendell Karlos Tomazelli Coltro, Iris Medeiros Junior
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Abstract
A portable system includes an electrochemical cell for batch injection analysis (BIA) coupled to a copper oxide electrode for the selective determination and quantification of monoethylene glycol (MEG) from different petrochemical samples with application in the environment laboratory and in field analyses, aiming at the quality control of these samples by portable methodology and in a short analysis time.
Claims6
A portable system for determining monoethylene glycol, comprising:
- a petrochemical sample comprising the monoethylene glycol;
- a potentiostat;
- and
- an electrochemical cell by batch injection, wherein the electrochemical cell comprises a polylactic acid as a substrate,
- wherein said electrochemical cell comprises a working electrode of copper oxide, an auxiliary electrode of stainless steel and an Ag/AgClsat reference electrode, all immersed in a support electrolyte that is a basic solution, and coupled to an electronic micropipette, with a flow rate of 4 μL/s of the petrochemical sample, and to a magnetic stirring system;
- wherein the support electrolyte is 0.5 mol/L NaOH;
- and
- wherein a volume ratio of the petrochemical sample and the support electrolyte is 50% (v/v).
A portable system for determining monoethylene glycol, comprising:
- a petrochemical sample comprising the monoethylene glycol;
- a potentiostat;
- and
- an electrochemical cell by batch injection,
- wherein said electrochemical cell comprises a working electrode of copper oxide, an auxiliary electrode of stainless steel and an Ag/AgClsat reference electrode, all immersed in a support electrolyte that is a basic solution, and coupled to an electronic micropipette, with a flow rate of 4 μL/s of the petrochemical sample, and to a magnetic stirring system;
- wherein the electronic micropipette is 2 mm away from the working electrode;
- wherein the support electrolyte is 0.5 mol/L NaOH;
- and
- wherein a volume ratio of the petrochemical sample and the support electrolyte is 50% (v/v).
Dependencies are inferred from the claim text.