Purity detecting method and device for polysilicon
A purity detection and polysilicon technology, applied in the chemical and solar fields, can solve the problems of low test results of impurity element content, reduce the accuracy of analysis and test, and react violently, and achieve the effect of eliminating the influence of impurities, eliminating interference and improving detection accuracy.
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[0036] Embodiment 1: The specific embodiment 1 of the present invention provides a method for detecting the purity of polysilicon. The technical scenario of this embodiment is that in this embodiment, 10 g of polysilicon ingots are crushed, crushed and ball milled to obtain silicon powder; this embodiment uses The deionized water is distilled water; the polyhydroxy compound selected in this embodiment can be mannitol. The method as image 3 Shown: includes:
[0037] Step 31, after washing the silicon powder with twice distilled water for 3 times, drying to constant weight;
[0038] Step 32. Weigh 0.5000g of silicon powder and place it in a Teflon plate, add water to wet the sample, and add 0.5mL of mannitol solution with a concentration of 2.5g / L;
[0039] The weight of silicon powder weighed in this step is accurate to 0.1 mg.
[0040] Step 33, place the Teflon plate on the upper part of the Teflon container and place it in a sealing body, add 10mL hydrofluoric acid (GR) a...
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