摘要
富勒烯纯度影响了其力学、热学等性能及其在润滑、超导等领域的应用。紫外可见分光光度法仪器简单、操作简便,适用于富勒烯纯度的快速测量。然而,目前紫外可见分光光度法对富勒烯纯度测量的相关文献中,尚未有对测量影响因素的系统分析。因此,基于紫外可见分光光度法,建立了C 60富勒烯纯度测量的数学模型,通过分析紫外可见分光光度法测量富勒烯纯度的不确定度来源,进行不确定度评定。结果表明:电弧法合成的C 60富勒烯纯度为(74±7)%,k=2;燃烧法合成的C 60富勒烯纯度为(99±9)%,k=2。同时,通过不确定度评定,分析最大不确定度分量主要来源于标准曲线的拟合和标准系列溶液的配制,为后续基于紫外可见分光光度法的富勒烯纯度测量降低不确定度、提高测量准确性提供了技术依据。
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 C 60 was established,and uncertainty was evaluated by analyzing all possible uncertainty sources.The results showed that the purity of C 60 prepared by arc method is(74±7)%,k=2;and the purity of C 60 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.
作者
赵春月
任玲玲
蒲成
邵鸿飞
姚雅萱
ZHAO Chun-yue;RENG Ling-ling;PU Cheng;SHAO Hong-fei;YAO Ya-xuan(College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang,Liaoning 110142,China;Center for Advanced Measurement Science,National Institute of Metrology,Beijing 100029,China;Shandong Institute of Nonmetallic Materials,Jinan,Shandong 250031,China)
出处
《计量学报》
CSCD
北大核心
2023年第12期1904-1911,共8页
Acta Metrologica Sinica
基金
国家自然科学基金青年基金(21908211)
中国计量科学研究院基本科研业务费(AKYJJ1902)。
关键词
化学计量
富勒烯
纯度测量
紫外可见分光光度法
不确定度评定
chemometrics
fullerene
purity measurement
ultraviolet-visible spectrophotometer
uncertainty evaluation
