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Electrochemical sensor capable of simultaneously measuring contents of hematoxylin and brazilin

A technology of Brazilian hematoxylin and hematoxylin, applied in the direction of electrochemical variables of materials, etc., can solve the problem of difficulty in simultaneous determination of hematoxylin and Brazilian hematoxylin content.

Inactive Publication Date: 2012-06-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrochemical sensors have the advantages of simple design and manufacture, high sensitivity, low price, and easy miniaturization. However, because hematoxylin and brazilian hematoxylin have similar electrochemical properties, it is difficult for ordinary electrodes to simultaneously measure hematoxylin and brazilian hematoxylin. content

Method used

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  • Electrochemical sensor capable of simultaneously measuring contents of hematoxylin and brazilin

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Embodiment 1

[0017] Graphite electrode through 0.3μm Al 2 o 3 After the powder is polished into a mirror surface, it is ultrasonically cleaned with ethanol and water in sequence. Using ultrasonic dispersion, 1 mg of carbon nanotubes and 0.1 mg of platinum nanowires were dispersed in 1 mL of water to form a mixed suspension of carbon nanotubes and platinum nanowires. Use a micro-sampler to take 2 μL of this suspension on the surface of the polished glassy carbon electrode, dry it at room temperature, and then evenly cover the electrode surface with 1 μL Nafion, and after drying, the platinum nanowire-carbon nanometer tube electrode. Dip this electrode into a 2.0×10 -3 mol / L p-aminobenzenesulfonic acid pH 7.0 PBS solution, using a three-electrode system under static conditions, under 1.5V voltage, with 100mV / s cycle scanning for 10 laps, take it out, and rinse with secondary water to obtain poly p-Sanilic acid / platinum nanowire-carbon nanotube composite film modified electrode.

[0018]...

Embodiment 2

[0023] Graphite electrode through 0.3μm Al 2 o 3 After the powder is polished into a mirror surface, it is ultrasonically cleaned with ethanol and water in sequence. 10 mg of carbon nanotubes and 0.8 mg of platinum nanowires were dispersed in 1 mL of water by ultrasonic dispersion to form a mixed suspension of carbon nanotubes and platinum nanowires. Use a micro-sampler to take 2 μL of this suspension on the surface of the polished glassy carbon electrode, dry it at room temperature, and then evenly cover the electrode surface with 1 μL Nafion, and after drying, the platinum nanowire-carbon nanometer tube electrode. Dip this electrode into a 5.0×10 -3 mol / L p-aminobenzenesulfonic acid pH 7.0 PBS solution, using a three-electrode system under static conditions, at a voltage of 0.5V, with 100mV / s cycle scanning for 10 laps, take it out, rinse with secondary water, and obtain poly 4-aminobenzenesulfonic acid / platinum nanowire-carbon nanotube composite film modified electrode....

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Abstract

An electrochemical sensor capable of simultaneously measuring contents of hematoxylin and brazilin is disclosed, which is characterized in that CV (coefficient of variation) curves in hematoxylin with different concentrations and brazilin with different concentrations are measured in a buffering solution with the pH value of 3-11 by using a three-electrode system with a poly(p-aminobenzene sulfonic acid) / platinum nanometer wire-carbon nanotube composite-film modified electrode as a working electrode, wherein the temperature is 20-80 DEG C, and the scanning speed is 30-600mv / s, so as to obtain a linear response relationship, lower detectable limit and the like. The electrochemical sensor can simultaneously measure the contents of the hematoxylin and the brazilin.

Description

technical field [0001] The invention relates to a method for simultaneously measuring the contents of hematoxylin and brazilian hematoxylin. Background technique [0002] The research on the pharmacological effects of Sappan began in the 1970s, and there are many studies at home and abroad. In the past ten years, dozens of reports have shown that Sappan has many clinical pharmacological effects, including immunosuppressive effect, anti-tumor effect, Antibacterial and anti-inflammatory effects, sedative and analgesic effects, hypoglycemic effects, etc. It is reported in the literature that the main active ingredients in hematoxylin hematoxylin and brazilian hematoxylin have different pharmacological effects, so it is very important to effectively separate and determine the content of hematoxylin and brazilian hematoxylin. [0003] Hematoxylin belongs to plant polyphenols. Because plant polyphenols coexist and are similar to flavonoids, anthraquinones, simple phenols and lig...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30
Inventor 高海燕仇小飞侯秀良刘瑛陈新许芳萍
Owner JIANGNAN UNIV
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