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Method for preparing electropolymerized sulfosalicylic acid modified glassy carbon electrode and application of glassy carbon electrode in measurement of tryptophan

A technology of sulfosalicylic acid and glassy carbon electrodes, applied in the field of electrochemical analysis and detection, to achieve the effects of easy operation, improved sensitivity, good reproducibility and stability

Inactive Publication Date: 2012-06-20
SHANGHAI UNIV
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Problems solved by technology

And there is no report on the detection of tryptophan by electropolymerization sulfosalicylic acid modified glassy carbon electrode.

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  • Method for preparing electropolymerized sulfosalicylic acid modified glassy carbon electrode and application of glassy carbon electrode in measurement of tryptophan
  • Method for preparing electropolymerized sulfosalicylic acid modified glassy carbon electrode and application of glassy carbon electrode in measurement of tryptophan
  • Method for preparing electropolymerized sulfosalicylic acid modified glassy carbon electrode and application of glassy carbon electrode in measurement of tryptophan

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Embodiment 1

[0017] The preparation method and steps of the modified carbon paste electrode in the present embodiment are as follows:

[0018] (1) Pretreatment of the glassy carbon electrode: firstly, the glassy carbon electrode is coated with 0.05 μm Al 2 o 3 The polishing powder and suede are polished to a mirror surface, and then ultrasonically cleaned with distilled water, dilute nitric acid solution, absolute ethanol and double distilled water in sequence, and then used.

[0019] (2) A use and method of use as an electrochemical sensor for tryptophan in the process of detecting the concentration of tryptophan, the use of which is: the modified glassy carbon electrode can be directly used for the electrochemical determination of tryptophan; its use The method and measurement method are as follows: the glassy carbon electrode modified by electropolymerization sulfosalicylic acid is used as the working electrode, the saturated calomel electrode is used as the reference electrode, and th...

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Abstract

The invention relates to a method for preparing an electropolymerized sulfosalicylic acid modified glassy carbon electrode, and use of the glassy carbon electrode as a tryptophan electrochemical sensor in high-sensitivity measurement of tryptophan in compound amino acid injection, and belongs to the technical field of electrochemical analysis and detection. The invention mainly aims to prepare the electropolymerized sulfosalicylic acid modified glassy carbon electrode to perform sensitive quantitative analysis and measurement on the tryptophan by a differential pulse voltammetry. Experimental results show that: the modified electrode has an obvious sensitization effect on the tryptophan in a phosphate buffer solution at the concentration of 0.1mol / L and the pH of 3.5, and under the optimal conditions, the differential pulse voltammetry is adopted for measurement, and the tryptophan at the concentration in a range of 5.0*10<-8>-4.0*10<-4> and peak current of the tryptophan have a good linear relation, and the detection limit is 4.0*10<-8>. When the method is used for measuring the tryptophan content in a medicine, results are satisfactory.

Description

technical field [0001] The invention relates to a glassy carbon electrode modified by electropolymerization sulfosalicylic acid and its application to high-sensitivity determination of tryptophan in compound amino acid injection, belonging to the technical field of electrochemical analysis and detection. Background technique [0002] Tryptophan is one of the eight essential amino acids for the human body, which can be transformed into 5-hydroxytryptamine, an important neurotransmitter in the human brain, and exists in many human tissues. Moreover, tryptophan is also one of the amino acid components of protein and participates in the regulation of protein synthesis. During the catabolism process in the human body, tryptophan will produce a series of biologically active substances, which play a huge physiological role in the body. Tryptophan and its derivatives are often used in food additives and clinical drugs, and have broad application value. However, if tryptophan is e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
Inventor 丁亚平巴溪罗立强李丽刘霄
Owner SHANGHAI UNIV
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