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Automatic test device for sample processing for determination of lead in tinplate coating

A technology for sample processing and automatic testing, which is applied in the preparation of test samples, electrochemical variables of materials, etc., can solve the problems of lead migration, complex sample preparation, affecting measurement accuracy, etc. Effect

Active Publication Date: 2016-08-10
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process of sample pretreatment in this method needs to be completed manually, the sample preparation is complicated and time-consuming, and in the process of sealing and baking the paint, it may cause the migration of lead and affect the measurement accuracy

Method used

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  • Automatic test device for sample processing for determination of lead in tinplate coating

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Embodiment Construction

[0018] Such as figure 1 Shown, the present invention a kind of lead determination sample processing automatic test device in tinplate coating, it comprises:

[0019] An electrolytic cell 1, which is an open container, contains a stripping solution and is equipped with a tinplate 2 to be measured;

[0020] A sealing ring 12, which is nested in the electrolytic cell 1, and is in contact with the surface of the tinned plate to be tested 2; the lower part of the tinned plate to be tested 2 is also provided with a positioning rod 3;

[0021] A pneumatic sealing mechanism, which includes a pneumatic valve 4 and a closed actuator rod 5 for sealing the sealing ring and the tin plate to be tested;

[0022] A set of electrodes, with platinum wire wound inside the electrolytic cell as the working electrode 6, a silver electrode or calomel electrode 7 inserted into the electrolytic cell 1 as the reference electrode, and a retractable titanium alloy needle connected to the tinned plate 2 ...

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Abstract

The present invention relates to a plating layer test of a tin plate, specifically to an automatic sample treatment test apparatus for determining lead in a tin plate plating layer. The apparatus comprises: an electrolysis tank, wherein the electrolysis tank is filled with a stripping solution and is provided with a tin plate requiring determination; a sealing ring inserted and sleeved inside the electrolysis tank; a pneumatic sealing mechanism, wherein the pneumatic sealing mechanism comprises a pneumatic valve and a sealing execution rod; electrodes, wherein platinum wire is wound inside the electrolysis tank to be adopted as a work electrode, a silver electrode or a calomel electrode inserted into the electrolysis tank is adopted as a reference electrode, and a titanium alloy pin connected with the tin plate requiring determination is adopted as a sample electrode; a sample collection device communicated with the electrolysis tank; a set of liquid adding system, wherein the system comprises a chemical tank and a peristaltic pump; a set of flushing system, wherein the system comprises a distilled water tank, a pipeline connected with the electrolysis tank, and sprinklers; and a PLC control system for controlling switches for connecting the peristaltic pump, the pneumatic valve and a sample collector and a flushing switch. With the present invention, lead determination automation in the tin plate plating layer can be achieved, and determination precision and work efficiency can be improved.

Description

technical field [0001] The invention relates to a coating test of a tinplate, in particular to a test device for measuring lead in the coating of a tinplate. Background technique [0002] Tinplate is widely used in food packaging materials. Since the safety of food packaging materials and containers is an important part of food safety, countries have formulated many safety management regulations and standards related to food packaging metal materials in order to protect the health of the people and promote trade. and implementation details. Users of beverage cans and food cans are increasingly paying attention to the apparent or potential impact of tinplate on food safety, such as heavy metals (Pb, Cd, Cr 6 ＋ etc.) to food must not be "endangering human health" and the amount of migration is less than the maximum limit. The EU standard "EN10333-2005 "Packaging steel tinplates in contact with human and animal food and beverages" stipulates that the lead in the tinplate coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/28G01N1/28
Inventor 朱子平林毅施振岩王君祥
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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