Method for preparing carbon nano-tube/poly L-cysteine composite modified glassy carbon electrode

A technology of cysteine ​​and carbon nanotubes, applied in the direction of material electrochemical variables, etc., can solve the problems of expensive electrode modification materials, cumbersome electrode preparation methods, and limited current peak resolution, so as to achieve a firm electrode modification layer and low cost , little effect

Inactive Publication Date: 2006-08-30
YANGZHOU UNIV
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Problems solved by technology

However, the current peak resolution of the three existing methods is limited, the sensitivity is not high, the electrode preparation method is cumbersome, the electrode modification materials are expensive, not easy to obtain, and the biocompatibility is not

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  • Method for preparing carbon nano-tube/poly L-cysteine composite modified glassy carbon electrode
  • Method for preparing carbon nano-tube/poly L-cysteine composite modified glassy carbon electrode
  • Method for preparing carbon nano-tube/poly L-cysteine composite modified glassy carbon electrode

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Embodiment Construction

[0013] For the pretreatment of bare glassy carbon electrodes, the surface of glassy carbon electrodes is coated with 0.3 μm and 0.05 μm ultrafine Al 2 o 3 The suspension was polished on silk, then ultrasonically cleaned in double-distilled water for five minutes, and finally blown dry with high-purity nitrogen for use.

[0014] For the purification of carbon nanotubes, 10 mg of multi-walled carbon nanotubes (MWNCTs) were placed in 40 mL of concentrated HNO 3 Stir and reflux in medium for 12 hours, let it stand still, until the carbon nanotubes are completely precipitated, pour off the supernatant, and wash the carbon nanotubes with secondary water for several times until the supernatant shows neutral pH. The carbon nanotube precipitate was vacuum dried for 24 h.

[0015] For the preparation of carbon nanotube modified electrodes, 1 mg of multi-walled carbon nanotubes after acidification treatment was added to 10 mL of N, N-dimethylformamide (DMF), and ultrasonically disperse...

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Abstract

The invention relates to a manufacture method for carbon nm tube/ poly L-cysteine compound modification glass carbon electrode. The process includes the following steps: purifying the multi-wall carbon nm tube, separating into N, N-dimethyl formamide solution, dropping the solution onto the surface of glass carbon electrode, drying under infrared light, locating the electrode into dilute hydrochloric acid containing L-cysteine to take electric polymerizing; taking out the electrode compounding L-cysteine to wash and gain carbon nm tube/ poly L-cysteine compound modification glass carbon electrode. The method is simple, and low cost. The product has high reliability and good repeatability. It has long useful life and could be used in electrochemistry rapidly testing for uric acid and ascorbic acid in blood serum.'

Description

technical field [0001] The invention relates to a preparation method of a carbon nanotube / poly L-cysteine ​​composite modified glassy carbon electrode capable of simultaneously and quickly measuring uric acid, dopamine and ascorbic acid in blood serum. Background technique [0002] Uric acid is the main product of purine metabolism. Abnormal concentration of uric acid in human body fluid can cause many diseases, such as gout, hyperuricemia, etc. Excessive concentration of uric acid in blood can cause renal failure and cardiovascular diseases. Therefore, rapid and accurate determination of the concentration of uric acid in body fluid or blood is of great significance in biochemistry and clinical diagnosis. Nowadays, the enzyme-linked colorimetric method is mostly used for clinical determination. Its advantage is high selectivity, but affected by the enzyme activity, it has poor stability, expensive instruments, and low sensitivity. Electrochemical assays have attracted wides...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 王赪胤邵晓秋刘清秀杨功俊胡效亚
Owner YANGZHOU UNIV
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