EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 3856-7 testing. ISO 3856-7 is a standard that provides guidelines for determining the mercury content in the liquid portion of water-dilutable paints as well as the mercury content in the pigment portion of paint. The standard specifies a flameless atomic absorption spectrometric method for this purpose.
The principle consists in oxidizing the mercury compounds in the test solution obtained from the pigment part of the paint or burning the evaporation residue of the test solution obtained from the liquid part of water-dilutable paints with oxygen in a closed system.
The flameless atomic absorption spectrometric method involves dissolving the pigment portion of the paint or the liquid portion of water-dilutable paints in a mixture of hydrochloric acid and nitric acid. The resulting solution is then atomized in a flameless furnace, in which mercury and other elements present evaporate. The evaporated elements are then excited by a beam of light from a mercury lamp, and the amount of light absorbed by the mercury atoms is measured by a detector. The amount of absorption is proportional to the amount of mercury present in the sample and can be used to calculate the mercury content of the paint.
The ISO 3856-7 standard provides detailed instructions for performing the flameless atomic absorption spectrometric method, including equipment, reagents, sample preparation, and calculation of results. The standard also specifies limits for the maximum allowable mercury content in paints and varnishes.
Overall, ISO 3856-7 is an important standard for ensuring the safety and quality of paints and varnishes and protecting the health of workers and consumers who may come into contact with these products.
EUROLAB assists manufacturers with ISO 3856-7 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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