Use of calcite for evaluation of spectral resolution of Raman spectrometers.

IF 1.8 4区 化学 Q3 CHEMISTRY, ANALYTICAL
Nobuyasu Itoh
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引用次数: 0

Abstract

Raman microscopes are widely used in various fields and their spectral resolutions differ greatly depending on the system and optical components. Thus, it is important to evaluate the spectral resolution of Raman systems under measurement conditions. Although both atomic emission lines and calcites have been used for the evaluation of spectral resolution and described in some guidelines, calcite is preferable because it contains information on laser width. Calcite is a crystal with a trigonal structure and the peak width of Raman spectra is sensitive to crystallinity, so the peak width of calcite may change depending on its quality. In this study, we examined differences in the peak width of atomic emission lines and calcites as well as laser line. The peak width of calcite at ~ 1086 cm-1 was wider than that of laser and atomic emission lines due to contribution of laser width and calcite itself. Among various calcite samples, calcite blocks for optical prisms showed the narrowest peak width (< 1.3 cm-1) followed by high-grade reagent calcites (1.35-1.43 cm-1) and usual-grade reagent calcites (2.23-2.53 cm-1). Although the peak width of calcite slightly changed with temperature (~ 0.2 cm-1 between 5 °C and 45 °C), it was comparable to the differences among high-grade reagent calcites. Thus, calcite is preferable for evaluating spectral resolution of Raman systems but its quality requires attention.

利用方解石评估拉曼光谱仪的光谱分辨率。
拉曼显微镜广泛应用于各个领域,其光谱分辨率因系统和光学元件的不同而有很大差异。因此,在测量条件下评估拉曼系统的光谱分辨率非常重要。虽然原子发射线和方解石都被用于评估光谱分辨率,并在一些指南中进行了描述,但方解石更可取,因为它包含激光宽度的信息。方解石是一种具有三方结构的晶体,而拉曼光谱的峰宽对结晶度很敏感,因此方解石的峰宽可能会随其质量的变化而变化。在这项研究中,我们考察了原子发射线和方解石以及激光线的峰宽差异。方解石在 ~ 1086 cm-1 处的峰宽比激光线和原子发射线的峰宽要宽,这是由于激光线宽和方解石本身的影响。在各种方解石样品中,光学棱镜用方解石块的峰宽最窄(-1),其次是高级试剂方解石(1.35-1.43 cm-1)和普通试剂方解石(2.23-2.53 cm-1)。虽然方解石的峰宽随温度的变化而略有变化(在 5 °C 和 45 °C 之间约为 0.2 cm-1),但与高级试剂方解石之间的差异相当。因此,方解石是评估拉曼系统光谱分辨率的首选,但需要注意其质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Analytical Sciences
Analytical Sciences 化学-分析化学
CiteScore
2.90
自引率
18.80%
发文量
232
审稿时长
1 months
期刊介绍: Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.
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