1. College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang, Liaoning 110142,China
2. Center for Advanced Measurement Science,National Institute of Metrology,Beijing 100029,China
3. Shandong Institute of Nonmetallic Materials, Jinan, Shandong 250031,China
Abstract：The purity has an impact on fullerene’s mechanical, thermal and other properties of fullerene, hence its applications in lubricity, superconductivity and other related areas. Ultraviolet-visible (UV-vis) spectrophotometer is a simple and convenient technique for rapid determination of fullerene purity. Yet, elaborated systematic analysis on measurement influencing factors are currently not been reported. Based on UV-vis spectrophotometer, a mathematical model for purity determination of C60 was established, and uncertainty was evaluated by analyzing all possible uncertainty sources. The results showed that the purity of C60 prepared by arc method is (74±7)%, k=2; and the purity of C60 prepared by combustion method is (99±9)%, k=2. Based on uncertainty evaluation, main sources of uncertainty come from linear fitting of standard curve and preparation of standard series solutions, which may provide technical basis for optimization of measurement conditions with reduced uncertainty and improved accuracy for future study.
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2023, Vol. 44 
