红外光谱法测定精TiCl_4中CS_2结果的不确定度评定

Uncertainty evaluation in detrmination of CS_2 in fine TiCl_4 by infrared spectrometry

采用红外光谱法测定了精TiCl4中CS2的含量并对测定结果进行了不确定度的评定。红外光谱法测定精TiCl4中CS2含量为6.60±0.082mg·kg-1。对标准储备液的配制、标准溶液的配制、标准曲线校正、样品重复性测定、仪器示值所引起的不确定度分量进行了评定,并计算出合成标准不确定度和扩展不确定度。结果表明,标准系列溶液的配制和标准曲线的拟合是引入不确定度的主要来源,在实验中应特别注意。

The content of CS2 in fine TiCl4 were determined by infrared spectrometry and its uncertainty was evaluated.The content of CS2 in fine TiCl4 was 6.60±0.082mg·kg-1.The evaluation results show that the preqaration of standard series solution and the standard curve are the main sources of uncertainty in the experiment.