Weng Tsu-Chien, Waldo Geoffrey S, Penner-Hahn James E
Department of Chemistry and Biophysics Research Division, University of Michigan, Ann Arbor, MI 48109-1055, USA.
J Synchrotron Radiat. 2005 Jul;12(Pt 4):506-10. doi: 10.1107/S0909049504034193. Epub 2005 Jun 15.
Accurate normalization of X-ray absorption data is essential for quantitative analysis of near-edge features. A method, implemented as the program MBACK, to normalize X-ray absorption data to tabulated mass absorption coefficients is described. Comparison of conventional normalization methods with MBACK demonstrates that the new normalization method is not sensitive to the shape of the background function, thus allowing accurate comparison of data collected in transmission mode with data collected using fluorescence ion chambers or solid-state fluorescence detectors. The new method is shown to have better reliability and consistency and smaller errors than conventional normalization methods. The sensitivity of the new normalization method is illustrated by analysis of data collected during an equilibrium titration.
准确归一化X射线吸收数据对于近边特征的定量分析至关重要。本文描述了一种以程序MBACK实现的将X射线吸收数据归一化为表格化质量吸收系数的方法。将传统归一化方法与MBACK进行比较表明，新的归一化方法对背景函数的形状不敏感，从而能够准确比较透射模式下收集的数据与使用荧光电离室或固态荧光探测器收集的数据。结果表明，新方法比传统归一化方法具有更好的可靠性、一致性和更小的误差。通过对平衡滴定过程中收集的数据进行分析，说明了新归一化方法的灵敏度。
