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

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...

AI Technical Summary

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 good

So far, there has been no literature report on the modification of multi-walled carbon nanotubes and L-cysteine ​​to glassy carbon electrodes to make composite modified electrodes for the simultaneous determination of uric acid, dopamine, and ascorbic acid.

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