Method for detecting content of harmful substances in paint coating

Abstract

The invention discloses a method for detecting the content of harmful substances in a paint coating. The method comprises the following steps of (1) selection of materials: purchasing the qualified paint products from the market, and the to-be-detected paint products respectively by one part; (2) diluting: respectively putting the qualified paint products and the to-be-detected paint products in step (1) into four volumetric flasks, respectively marking the volumetric flasks with a qualified product 1, a qualified product 2, a to-be-detected product 1 and a to-be-detected product 2, injectingthe same mass of high-concentration industrial alcohol, shaking the volumetric flasks, and enabling the paint in the volumetric flasks to be fully mixed with the high-concentration industrial alcohol;(3) detection I: respectively feeding the same mass of silver and ammonia solutions into the volumetric flasks with the qualified product 1 and the to-be-detected solution 1 in step (2), reacting, and separating the silver white metallic silver. The method has the advantage that by classifying the diluted paint, and comparing the mass of the solid separating amounts of the qualified products on the market, the qualifying condition of the contents of formaldehyde and benzene in the to-be-detected paint is finally guaranteed, and the problem of overhigh overall detection cost is solved by reducing the detection cost.

Description

technical field [0001] The invention relates to the technical field of detection of harmful substances in paint, in particular to a method for detecting the content of harmful substances in paint coatings. Background technique [0002] Paint is a chemical mixture coating that can firmly cover the surface of objects for protection, decoration, marking and other special purposes. The relatively authoritative book "Painting Technology" in the Chinese coatings industry defines it as follows: "Painting is a material that can be coated on the surface of an object by different construction techniques to form a firm adhesion, a certain strength, and a continuous coating. Solid thin film. The film formed in this way is commonly known as coating film, also known as paint film or coating." Paint is rich in organic substances such as formaldehyde and benzene, which are immeasurable to the human body when formaldehyde and benzene volatilize in the air. The paint in the test has various ...

AI Technical Summary

Problems solved by technology

[0003] The existing detection methods generally use high performance liquid chromatography, spectrophotometry, gas chromatography, and headspace methods to detect benzene and formaldehyde contained in paint, but the inspection process requires the cooperation of various advanced equipment , and the high detection cost makes its detection a waste of a lot of financial resources, so it cannot meet the needs of existing technologies