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Detection method for fast screening of total lead content in surface coating

A technology of surface coating and detection method, applied in the field of detection, can solve the problems of small production capacity of a single microwave digestion instrument and difficult batch processing of samples, and achieve the effect of saving manpower, reducing operation difficulty and low cost.

Inactive Publication Date: 2019-03-29
深圳天祥质量技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the capacity of a single microwave digestion instrument is small, and it is difficult to process samples in batches, so a new technical method needs to be found to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the sample is placed on an electronic balance and weighed 0.1g, and the weighed sample is placed in a glass test tube for use; 10ml of concentrated nitric acid is added to the glass test tube to which the sample is added, and after shaking, it is added to a water bath and kept at a constant temperature. Heat for 1 hour and maintain the temperature of the water bath at 100°C, take out the test tube and wipe the water on the surface of the test tube, place it in the test tube rack to cool at room temperature for 15 minutes, then add 10ml of deionized water to obtain solution A, and use qualitative filter paper to add the solution after adding deionized water Filter to obtain solution B, inject solution B into a 25ml volumetric flask, inject deionized water into the volumetric flask until the scale line to obtain solution C; test solution C by ICP-OES to obtain the result, compared with the traditional detection method , the detection method has large-scale ma...

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Abstract

The invention provides a detection method for rapid screening of total lead content in surface coating. The method comprises the following steps: sampling, placing a sample on an electronic balance, weighing 0.1g, and placing the weighed sample in a glass tube for further use; reacting, 10ml of concentrated nitric acid into the glass test tube in which the sample is added, after shocking, adding mixture into a water bath kettle, heating for 1h at constant temperature, and maintaining temperature of the water bath at 100 DEG C; cooling, taking out the test tube and wiping water on the surface of the test tube, placing the test tube on a test tube stand, cooling 15min at normal temperature, and then, adding 10ml of deionized water, thereby obtaining solution A; filtering, filtering the solution in which the deionized water is added through a qualitative filter paper, obtaining solution B, injecting the solution B into a 25ml volumetric flask, injecting the deionized water into the volumetric flask, until reaching a scale line, and obtaining solution C; and detecting, detecting the solution C through ICP-OES, and obtaining a result.

Description

technical field [0001] The invention relates to a rapid screening detection method for the total lead content in a surface coating, which belongs to the detection field. Background technique [0002] In the prior art, the current international commonly used test standard ASTM E1645-16 stipulates that a microwave digestion system is used to digest coating samples to quantitatively analyze the total lead content. Microwave digestion directly heats the substance through the two effects of molecular polarization and ion conduction, which promotes the rapid rupture of the surface layer of the solid sample, resulting in a new surface and solvent interaction, which can quickly and completely digest the sample. The microwave digestion method uses its good digestion effect as a coating The preferred method for layer wet digestion. However, the capacity of a single microwave digestion instrument is small, and it is difficult to process samples in batches, so a new technical method ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28G01N1/34G01N1/44
CPCG01N1/28G01N1/34G01N1/44G01N21/73
Inventor 黄鸿森
Owner 深圳天祥质量技术服务有限公司
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