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Silk screen printing electrode and producing process, and sensor and detecting method

A technology for screen printing electrodes and a preparation process, which is applied in the field of analytical instruments, can solve the problems of easy damage to the sensor surface, poisoning of the sensor electrodes, etc., and achieves the effects of simple processing method, low cost and simple structure

Inactive Publication Date: 2010-01-27
嘉兴博泰生物科技发展有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the practical application of electrochemical sensors, due to the complexity of the actual sample, the sensor has the phenomenon of "electrode poisoning", which makes the surface of the sensor vulnerable to damage. Therefore, in recent years, disposable sensors have been widely studied to eliminate the detection process. Pollution

Method used

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  • Silk screen printing electrode and producing process, and sensor and detecting method
  • Silk screen printing electrode and producing process, and sensor and detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Embodiment: detect the Pb in the tap water spiked sample

[0024] A CHI660A electrochemical analyzer (CHI company) was used, in which the carbon electrode paste was Jujo from Japan, the gold paste, AgCl and insulating paste were Acheson, and the PET substrate was from Baoding Lucky Film Factory. Take tap water samples in Jiaxing area and prepare a series of spiked solutions with 0~30×10-6g / LPb ions. According to the method described in the present invention, carry out detection test, can obtain the square wave voltammetry curve in the following figure, Pb ion concentration calibration, read the peak current when-0.24V electric potential, Pb ion concentration adopts formula: C=A×I , where I is the current 10 -6 A, C is the concentration of lead ions, the unit is 10 -6 g / L. A is the calibration factor,

[0025] Typical value is 0.01.

[0026] The results show that the linear range of this method is 0~50×10 -6 g / L, sensitivity 0.08A / g L-1, detection accuracy 0.5×10 ...

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Abstract

A screen printing electrode contains a substrate printed electrode, external insulating layer printed on substrate and at least two electrode leading wires. It is characterized in that there are three electrodes printed on substrate, including a gold electrode, a carbon electrode and an Ag / AgCl electrode. Each electrode connects a leading wire correspondingly. Its manufacturing technology is: Firstly, select substrate, clean and drying for heat resisting. Then, print electrode leading wires, drying substrate. Print carbon electrode using carbon slurry and drying, Ag / AgCl electrode using Ag / AgCl slurry and drying in turn. Finally, utilize photofixation insulating slurry to print electrode standard layer and solidify it by ultraviolet light. The invention has simple electrode construction, convenient processing method and low cost. Sensor testing method depending on this electrode has convenient operation and high sensitivity.

Description

technical field [0001] The invention relates to a screen printing electrode capable of rapidly detecting heavy metal content in water, a preparation process, a sensor made of the screen printing electrode and a method for detecting heavy metal lead content of the sensor, belonging to the technical field of analytical instruments. Background technique [0002] Lead (Pb2+) is a harmful heavy metal ion that exists in nature. It is harmful to the human nervous system, digestive system, hematopoietic function and male reproductive system, especially to children whose brains are developing. For this reason, the World Health Organization stipulates that the Pb2+ content in water should not exceed 10 μg / L. The determination methods of Pb2+ include dithizone colorimetry, atomic absorption method, plasma mass spectrometry and electrochemical methods, etc. Among them, mass spectrometry is the most sensitive method, and the detection limit can reach 1.0×10-3μg / L. The limit can reach 1....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48H05K3/00
Inventor 蔡强孟凡国周海梦胡卫江李海龙
Owner 嘉兴博泰生物科技发展有限公司