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A method for quantifying a chemical substance with substitutional stripping volammetry and a sensor chip used therefor

A technology for sensing chips and chemical substances, which is applied in the fields of electrochemical variables of materials, measuring devices, scientific instruments, etc., and can solve the problems of reducing the accuracy of chemical substances measurement

Inactive Publication Date: 2012-07-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the method of Patent Document 1 has the technical problem that the concentration of the standard electrolyte can be changed by the evaporation of the eluate 6, resulting in a decrease in the accuracy of the determination of the chemical substance.

Method used

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  • A method for quantifying a chemical substance with substitutional stripping volammetry and a sensor chip used therefor
  • A method for quantifying a chemical substance with substitutional stripping volammetry and a sensor chip used therefor
  • A method for quantifying a chemical substance with substitutional stripping volammetry and a sensor chip used therefor

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Embodiment Construction

[0153] Below, refer to image 3 and Figure 4 , an embodiment of the present invention will be described.

[0154]

[0155] First, the sensor chip 300 is prepared.

[0156] image 3 The sensor chip 300 of Embodiment 1 is shown. Figure 4 is a schematic diagram of the sensor chip 300 connected to the voltage regulator 42 . The sensor chip 300 includes a substrate 30 , a pair of comb-shaped working electrodes 31 a / 31 b , a reference electrode 32 , an auxiliary electrode 33 , a stripping electrode 34 , stripping gel 35 , and a cover 37 . Whether to include the cover 37 is optional, and the cover 37 includes an inlet 36 and an air outlet 38 for injecting the sample solution.

[0157] A pair of comb-shaped working electrodes 31a / 31b is composed of a first working electrode 31a and a second working electrode 31b.

[0158] Inclusion of reference electrode 32 is optional. For the high precision requirement of quantitative determination, preferably, the sensor chip 300 inclu...

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Abstract

The evaporation of the stripping liquid (6) changes the concentration of the standard electrolyte. This causes the quantification accuracy of the chemical substance to be lowered. In order to solve the above problem, this invention provides a method for quantifying a chemical substance contained in a sample solution, characterized by the following stripping gel (35). The stripping gel (35) covers the stripping electrode (34), and contains a standard electrolyte and an ionic liquid; however, the stripping gel (35) contains no water. Furthermore, the ionic liquid is hydrophobic and nonvolatile, and the standard electrolyte is consisted of the anion and a metallic ion.

Description

technical field [0001] The invention relates to a method for quantitatively measuring chemical substances by displacement stripping voltammetry and a used sensor chip. Background technique [0002] Patent Document 1 discloses a displacement-type stripping voltammetry detection system. The high-sensitivity electrochemical quantitative determination of the chemical substances contained in the solution can be carried out by using the displacement-type stripping voltammetry detection system. [0003] figure 1 The displacement type stripping voltammetry detection system disclosed in Patent Document 1 is shown. The system includes a pair of comb-shaped working electrode 1, stripping electrode 2, reference electrode 3, auxiliary electrode 4, solution 5, stripping solution 6, salt bridge 7, ion conductor 8, voltage regulator 9, recorder 10, and switch Box 11. [0004] Solution 5 contains chemical substances and redox substances to be quantified. Eluate 6 contains standard elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/3277G01N27/48G01N27/42
Inventor 有本聪
Owner PANASONIC CORP