Methods for identifying the source of silica particles
A silica and particle technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of inability to realize silica, screening, etc., and achieve the effect of high judgment accuracy, strong operability, and high precision
Active Publication Date: 2021-01-05
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology
[0006] The embodiment of the present invention provides a method for identifying the source of silica particles, so as to solve the problem that the existing technology cannot realize the identification of silica from artificial sources and natural sources
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Embodiment 1
[0045] 1) Sample collection
[0046] see figure 1 , SEM images of silica particles of anthropogenic origin. 2 samples of silica particles synthesized by precipitation method and 2 samples of gas phase method were collected from Shouguang Changtai Micro-nano Chemical Factory, 4 samples of silica particles synthesized by gel method were collected from American nanocomposix company, and samples of silica particles synthesized by gel method were collected from American National Standard Material 1 natural quartz crystal sample was collected by the Institute of Technology and Technology, and a total of 9 actual samples were collected.
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The invention provides a method for discriminating sources of silica particles. Because silica particles of different sources have different silicon and oxygen natural stable isotope fingerprint characteristics, the silica particles of a natural source and an artificial source can be effectively discriminated. In addition, the silica particles synthesized by three different processes such as a gel method, a precipitation method and a vapor phase method have different silicon stable isotope compositions, so the sources of the silica particles synthesized by different processes can be discriminated.
Description
technical field [0001] The invention relates to the technical field of material detection, in particular to a method for identifying the source of silicon dioxide particles based on two natural stable isotopes of silicon and oxygen. Background technique [0002] Silica widely exists in nature, and together with other natural minerals, it constitutes rocks, accounting for about 12% of the mass of the earth's crust. Natural silica, also known as silica, exists in both crystalline and amorphous states in nature. Quartz crystal is the main natural crystalline silica, and its color varies with the content of impurities. Colorless and transparent quartz crystals are called crystals, and those with colored bands or layers are called agate (containing impurities). Natural quartz has a wide range of uses, and is often used as raw materials for handicrafts, construction materials and abrasive materials. Diatomaceous earth existing in nature is amorphous silica, which is the remains...
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IPC IPC(8): G01N27/62
CPCG01N27/62G01N27/626
Inventor 刘倩杨学志陆达伟江桂斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI