Analysis measuring method for brominated flame-retardant in plastic component of deserted household electrical appliance
A technology for brominated flame retardants and plastic parts is applied in the field of analysis and determination of brominated flame retardants in plastic parts of waste household appliances, which can solve the problems of incomplete purification of impurities, poor repeatability and accuracy of analysis results, and large amount of solvent used. problems, to reduce the cost of sample analysis, simplify the sample cleanup process, and improve the effect of solubility limitation
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[0025] Example 1
[0026] The invention is used to analyze the housing of a certain domestic brand TV set and the housing of a certain domestic brand water dispenser, and determine the type and content of the brominated flame retardant therein.
[0027] The housing of the TV set and the housing of the water dispenser were collected as samples. After coarsely crushing the two samples into a size of 1cm in diameter, the coarsely crushed sample is further finely crushed by a hammer mill. By connecting the screening device to the outlet of the crusher, the online connection of fine crushing and screening is realized. Use, carry out on-line combined sieving, collect 18 meshes for sieving.
[0028] Use an electronic balance to weigh 1g each of the TV shell and water dispenser shell samples processed in the previous step and place them in a 50mL glass beaker; measure 25mL of tetrahydrofuran (purity: chromatographic grade) with a graduated cylinder and mix it with the plastic sample evenly,
Example Embodiment
[0031] Example 2
[0032] The present invention is used to analyze the computer case of a certain American brand.
[0033] Take several representative samples in the computer case. The sample is coarsely crushed into a size of 1 cm in diameter, and the coarsely crushed sample is further finely crushed by a hammer mill, and combined with online sieving, collecting 18 meshes and sieving. Accurately weigh 2g of the computer case sample processed in the previous step into a 100mL glass beaker; measure 30mL of dichloromethane (purity: chromatographic grade) with a graduated cylinder and mix it with the plastic sample, stir to dissolve the sample in the solvent; weigh 20g of silica gel particles (60-100 mesh) mix with the above solution evenly, and continue to stir to make the solution more evenly mixed, and at the same time, completely volatilize the solvent in the sample at a temperature of 25°C to obtain a plastic sample with a uniformly distributed plastic film on the surface of the si
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