Standard sample for rapid screening and analysis of lead, cadmium, chromium, mercury and bromine in PP for X-ray fluorescence analysis of RoHS detection and preparation method thereof

Abstract

The invention discloses a standard sample for rapid screening and analysis of lead, cadmium, chromium, mercury and bromine in PP for X-ray fluorescence analysis of RoHS detection and a preparation method thereof. The standard sample is mainly prepared by the steps of: mixing the following raw materials including polypropylene, a diffusing agent, an antioxidant, toner, an antistatic agent and a target compound, then repeatedly melting, extruding and granulating to prepare round piece-shaped PP plastic. The standard sample prepared by the invention and a sample to be detected have similar chemical composition and physical structure, and a target element is uniformly distributed and has certain-concentration gradient distribution, so that the accuracy and the reliability of analysis data canbe ensured and the production efficiency is high; by adoption of a mode with repeated melting, extrusion and granulation, the former 1 / 3 extruded materials do not need to be discarded, so that the material waste and environmental pollution can be reduced; the formula provided by the invention can meet multiple repeated melting and extrusion without ageing. By adoption of mercury sulfide, the problem that the content of mercury can not be taken on according to an expected design and the mercury pollution can be caused due to loss of mercury element in the process of heating processing can be solved.

Description

Technical field [0001] The invention relates to the field of RoHS analysis, in particular to a rapid screening and analysis standard sample of lead, cadmium, chromium, mercury and bromine in PP for X fluorescence analysis of RoHS detection and a preparation method thereof. Background technique [0002] The production, sales and import of electrical and electronic products in China need to strictly control the cadmium (Cd), mercury (Hg), polybrominated (Br) biphenyl, polybrominated diphenyl ether, hexavalent chromium (Cr), lead (Pb) ) And other harmful substances, including lead, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, the maximum allowable content is 0.1%, and cadmium is 0.01%. X-ray fluorescence spectroscopy (XRF) is widely used in RoHS analysis due to its advantages such as high analysis accuracy, fast speed, wide concentration range of analysis elements, simple sample preparation and non-destructive testing. However, in the proc...

AI Technical Summary

Problems solved by technology

However, due to factors such as matrix effects, accuracy of physical parameters, and instrument stability, the accuracy of X-ray fluorescence spectrometer (XRF) standard-free quantitative analysis methods (such as the fundamental parameter method) is still low during the analysis and testing process. It is not ideal, and the relative comparison method based on standard samples must be used to obtain accurate and reliable analytical data

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