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Method for determining cations in electrophoresis tank liquid

A measurement method, cationic technology, applied in the automotive field, can solve problems such as accurate control of unfavorable bath liquid components and troubleshooting of paint film quality problems, and achieve the effects of improving detection efficiency and accuracy, small matrix effect, and optimizing measurement conditions

Pending Publication Date: 2021-04-09
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no method for accurate quantification and calculation of each ion, which is not conducive to the accurate control of the composition of the bath and the investigation of the quality of the paint film. Therefore, it is necessary to accurately and quickly measure the content of cations in the electrophoresis bath to better monitor the coating effect
[0005] At present, there are no literature reports on the determination of cation content in electrophoresis bath by inductively coupled plasma emission spectrometry at home and abroad

Method used

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  • Method for determining cations in electrophoresis tank liquid
  • Method for determining cations in electrophoresis tank liquid
  • Method for determining cations in electrophoresis tank liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. The main instruments and reagents used in the assay method of cations in a kind of electrophoresis bath are as follows:

[0040] Optima-4300 DV full-spectrum direct-reading inductively coupled plasma atomic emission spectrometer: American PE company; argon: purity ≥ 99.999%; nitric acid: analytically pure; nitric acid: 1+1; hydrogen peroxide; sodium, calcium, iron, Lead and nickel standard stock solution: 1000mg / L.

[0041] 2. Selection of instrument working conditions;

[0042] Prepare sodium, calcium, iron, lead, nickel mixed standard solution (10mg / L), respectively carry out light source power, observation height, carrier gas flow rate, cooling gas flow rate, auxiliary gas flow selection test, the determined working conditions of the instrument are shown in Table 1.

[0043] Table 1 Determination conditions

[0044]

[0045] 3. The choice of observation method;

[0046] Optima-4300 DV type ICP can choose horizontal and vertical two observation methods, using...

Embodiment 2

[0073] 1. The main instruments and reagents used in the assay method of cations in a kind of electrophoresis bath are as follows:

[0074] Optima-4300 DV full-spectrum direct-reading inductively coupled plasma atomic emission spectrometer: American PE company; argon: purity ≥ 99.999%; nitric acid: analytically pure; nitric acid: 1+1; hydrogen peroxide; sodium, calcium, iron, Lead and nickel standard stock solution: 1000mg / L.

[0075] 2. Selection of instrument working conditions;

[0076] Prepare sodium, calcium, iron, lead, nickel mixed standard solution (10mg / L), respectively carry out light source power, observation height, carrier gas flow rate, cooling gas flow rate, auxiliary gas flow selection test, the determined working conditions of the instrument are shown in Table 1.

[0077] Table 1 Determination conditions

[0078]

[0079] 3. The choice of observation method;

[0080] Optima-4300 DV type ICP can choose horizontal and vertical two observation methods, using...

Embodiment 3

[0104] 1. The main instruments and reagents used in the assay method of cations in a kind of electrophoresis bath are as follows:

[0105] Optima-4300 DV full-spectrum direct-reading inductively coupled plasma atomic emission spectrometer: American PE company; argon: purity ≥ 99.999%; nitric acid: analytically pure; nitric acid: 1+1; hydrogen peroxide; sodium, calcium, iron, Lead and nickel standard stock solution: 1000mg / L.

[0106] 2. Selection of instrument working conditions;

[0107]Prepare sodium, calcium, iron, lead, nickel mixed standard solution (10mg / L), respectively carry out light source power, observation height, carrier gas flow rate, cooling gas flow rate, auxiliary gas flow selection test, the determined working conditions of the instrument are shown in Table 1.

[0108] Table 1 Determination conditions

[0109]

[0110] 3. The choice of observation method;

[0111] Optima-4300 DV type ICP can choose horizontal and vertical two observation methods, using ...

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Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a method for determining cations in electrophoresis tank liquid. The method comprises the following steps: 1, preparing a test solution; 2, preparing a working curve solution; 3, carrying out determination; and 4, calculating an analysis result. According to the determination method, the characteristics of rapidness, accuracy, wide linear range and small matrix effect of an inductively coupled plasma spectrometer are utilized, different pretreatment methods are used for preparing a to-be-tested solution, optimal working conditions, coexisting element interference and the like of an instrument are optimized, trial analysis and verification tests of an electrophoresis tank solution sample are performed, the recovery rate of the method is 96.1%-105.4%, and the RSD is lower than 3%.

Description

technical field [0001] The invention belongs to the technical field of automobiles, in particular to a method for determining cations in an electrophoresis bath. Background technique [0002] The incorporation of impurity ions or some pollutants into the electrophoretic paint during the automobile painting process will have a serious impact, resulting in many quality problems of different degrees in the electrophoretic paint film. Impurity ions will destroy the stability of the electrophoretic bath, reduce the quality of the electrophoretic paint film, and reduce the utilization rate of the paint. [0003] The impurity ions in the electrophoresis bath are brought in by the pre-treatment of the coated object, the harmful ions brought in by the supply water, and the harmful ions produced by the dissolution of the polar surface, resulting in an increase in the conductivity of the bath. If it exceeds a certain limit, it will affect the workability and coating film. Appearance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/38G01N1/44G01N1/34G01N21/73
CPCG01N1/28G01N1/38G01N1/44G01N1/34G01N21/73
Inventor 王慧娟孙硕寇英达雷蕾温家德孙凯刘兴宝付新
Owner CHINA FIRST AUTOMOBILE
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