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Method for testing trace elements in coating

A technology of medium and trace elements and testing methods, which is applied in the field of testing of trace elements in coatings, can solve the problem of inability to measure the content of trace elements, and achieve the effect of improving test precision and accuracy and avoiding tediousness.

Inactive Publication Date: 2014-02-05
苏州华碧微科检测技术有限公司
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Problems solved by technology

[0004] In order to solve the problem that the existing empirical coefficient method cannot measure the content of trace elements in less weight samples, the present invention proposes the following technical solutions:

Method used

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Embodiment Construction

[0014] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0015] To detect harmful elements such as lead, cadmium, chromium, and mercury in a certain toy coating sample, scrape off the coating on the surface of the toy, and then perform a tablet test. The test steps are as follows:

[0016] A. Reduce the size of the original tablet press mold proportionally. The reduced mold sizes are: φ20mm, φ15mm, φ10mm, φ5mm;

[0017] B. Take 30 mg of boric acid powder used in conventional tabletting, carry out tableting experiments with molds of different sizes, record the amount of boric acid used when it can be pressed into discs, and the pressed discs should conform to conventional X-rays in terms of hardness and thickness. According to the requirements of the f...

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Abstract

The invention provides a method for testing trace elements in a coating, which comprises the following steps that: A. original tabletting press molds are respectively reduced to be the tabletting press molds with the diameters being respectively of 20mm, 15mm, 10mm and 5mm according to a proportion; B. boric acid powder with approximate quantity is taken to carry out a tabletting test, a wafer conforming to a test requirement is selected from the molds, and the test of a next step is continued; C. a standard powder sample comprising multiple inorganic trace elements is selected to be pressed into wafers through the molds selected in the previous step, and then the wafers are placed onto an X-ray fluorescent spectrometer to carry out a primary test; D. a set of standard powder samples is selected to carry out multi-time back-test experiments to conform the test effect; and E. a long-term stability effect test is carried out to finally confirm the test effect. By improving a sample making method of the X-ray fluorescent spectrometer, the test precision and the test accuracy of the inorganic trace elements in the coating can be improved.

Description

technical field [0001] The invention relates to a method for testing trace elements in coatings, in particular to a method for testing trace elements in coatings by using an X-ray fluorescence energy spectrum analysis method. Background technique [0002] At present, chemical testing methods and X-ray fluorescence spectroscopy are mainly used for the analysis of inorganic components of surface coating materials such as toys, alloys, plastics, ceramics, and glass. Among them, the pretreatment of chemical methods is relatively complicated and time-consuming, but the accuracy is relatively high; X-ray fluorescence spectroscopic analysis is fast and convenient. With the advancement and development of technology, the accuracy of some fields has been comparable to that of chemical analysis. Energy spectrometer testing is one of the methods. As a fast and convenient analysis method, X-ray fluorescence energy spectrometer is mainly used in the qualitative and quantitative analysis ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/223
Inventor 冯银巧
Owner 苏州华碧微科检测技术有限公司
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