Method for rapidly testing content of lead element in plated layer of tin plate

A technology for rapid determination and element content, applied in the detection field, can solve the problems of low detection accuracy, large matrix interference, and long detection time, and achieve the effects of high atomic absorption sensitivity, short detection time and high efficiency

Inactive Publication Date: 2018-11-06
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for quickly measuring the content of lead element in the tinplate coating, aiming to solve the problems of long detection time, low detection accuracy and large substrate interference in the existing detection method

Method used

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  • Method for rapidly testing content of lead element in plated layer of tin plate
  • Method for rapidly testing content of lead element in plated layer of tin plate

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Embodiment 1

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with specific implementation manners.

[0029] The reagents and raw materials used in the present invention are as shown in Table 1 below:

[0030] Table 1 Reagents and raw materials used in the present invention

[0031]

[0032] instrument :

[0033] ·Electrolytic tin removal equipment: electrochemical workstation, Shanghai Chenhua Instrument CHI760E

[0034] Setting of experimental conditions: choose chronopotentiometry, and set the parameters as Catholic Current 0.005A, Anodic Current 0.24A, Catholic Time 0.005s, Anodic Time 300s, Initial PolarityAnodic.

[0035] · Instruments for measuring lead: graphite furnace atomic absorption spectrometer, THERMO FISHER SCIENTIFIC, ICE3300

[0036] Experimental condition settings: wavelength 217nm, lamp current 10A, spectral passband width 0.5nm, sample injection volume 15μL, diammo...

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Abstract

The invention discloses a method for rapidly testing the content of a lead element in a plated layer of a tin plate. The method for rapidly testing the content of the lead element in the plated layerof the tin plate comprises the following steps: (1) pretreating a sample; (2) carrying out electrolysis tin removal; (3) preparing a standard solution, namely preparing a standard lead solution, a substrate improver and a diluent; (4) testing the lead element. By adopting the method, only one sample needs to be taken, and the method is short in detection time, high in efficiency and high in accuracy.

Description

technical field [0001] The invention provides a method for quickly measuring the content of lead element in the coating of a tinplate, in particular a method for quickly and directly measuring the content of the lead element in the electrolytic solution of the coating by using graphite furnace atomic absorption, which belongs to the technical field of detection. Background technique [0002] The EU BS EN 10333-2005 puts forward clear requirements for tinplate used in food and beverage packaging, and the lead content in the coating is less than 100ppm. Therefore, the lead content in the coating needs to be monitored in real time during the production process of the tinplate, that is, the lead content in the coating of the tinplate needs to be included in the quality process detection of the tinplate. [0003] The determination of the lead content in the tinplate coating given in Appendix A of EU BS EN 10333-2005 is to dissolve the tin coating by Coulomb method, then add hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/31G01N21/3103G01N2021/3196
Inventor 周保欣孙立周纪名朱防修莫志英王振文王爱红孙宇
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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