Abstract: A polysilicon fractured product includes fractured pieces including a ridge portion generated by fracturing a polysilicon rod. An average radius of curvature (r) of the fractured pieces is 50 ?m or more at a tip end of a ridge portion having an angle of 70° or less. The polysilicon fractured product is obtained by a method including fracturing a polysilicon rod to obtain fractured pieces, and etching at an etching speed of 2.5 ?m/min or less to achieve an etching depth of 5 ?m or more by immersing the fractured pieces obtained in the fracturing in an etching solution.

Abstract: Provided is an analysis method capable of qualitatively determining resins adhering to crushed polysilicon with high sensitivity and further capable of quantitatively determining the resins with high precision. The analysis method comprises removing organic volatile components from crushed polysilicon by heating, then raising a temperature of the crushed polysilicon in a stream of an inert gas, collecting resin decomposition products produced at the heating temperature, and analyzing decomposition products unique to the resins, to thereby identify the types of the resins adhering to the crushed polysilicon. Moreover, it is also possible to prepare a standard curve regarding each of the decomposition products unique to the resins and to determine an adhesion quantity of each of the adhering resins based on the standard curve.

Abstract: Provided is an analysis method capable of qualitatively determining resins adhering to crushed polysilicon with high sensitivity and further capable of quantitatively determining the resins with high precision. The analysis method comprises removing organic volatile components from crushed polysilicon by heating, then raising a temperature of the crushed polysilicon in a stream of an inert gas, collecting resin decomposition products produced at the heating temperature, and analyzing decomposition products unique to the resins, to thereby identify the types of the resins adhering to the crushed polysilicon. Moreover, it is also possible to prepare a standard curve regarding each of the decomposition products unique to the resins and to determine an adhesion quantity of each of the adhering resins based on the standard curve.