分波段式中阶梯光栅原子发射光谱仪

发布时间：2018-06-08 21:42

本文选题：原子发射光谱仪 + 电感耦合等离子体　；参考：《光学精密工程》2014年04期

【摘要】：受探测器发展水平的限制,以中阶梯光栅光谱仪为分光模块的ICP-AES电感耦合等离子体原子发射光谱仪(ICPAES)难以实现宽波段内多元素的同时测量。本文对现有中阶梯光栅光谱仪进行了改进,设计出一种适用于ICP-AES多元素同时测量的分波段式中阶梯光栅光谱仪。通过改变棱镜的入射角度,将系统波长扩展为200~900nm,光谱分辨率为25 000,突破了现有探测器尺寸的限制,实现了宽波段范围内的多元素快速测量。将中阶梯光栅光谱仪与固态ICP光源组合,进行了系统波长标定与化学试样测试。实验结果表明:波长测试误差小于0.01nm,满足化学元素精确判读要求;分波段式中阶梯光栅光谱仪在保持原有仪器性能的前提下,增宽了仪器的有效光谱探测范围,为多元素的同时测量提供了有效手段。
[Abstract]:The ICP-AES inductively coupled plasma atomic emission spectrometer (ICP-AES), which is limited by the development level of the detector, is difficult to realize the simultaneous measurement of multiple elements in the wide band. In this paper, the existing middle step grating spectrometer is improved, and a split-band middle step grating spectrometer is designed, which is suitable for the simultaneous measurement of multielement in ICP-AES. By changing the incidence angle of the prism, the wavelength of the system is extended to 200 nm and the spectral resolution is 25 000, which breaks through the limitation of the existing detector size and realizes the fast measurement of multi-elements in the wide band range. The system wavelength calibration and chemical sample test were carried out by combining the medium step grating spectrometer with the solid state ICP light source. The experimental results show that the error of wavelength measurement is less than 0.01 nm, which meets the requirement of accurate interpretation of chemical elements, and the effective spectral detection range of the instrument is widened by using the split-band middle step grating spectrometer on the premise of maintaining the performance of the original instrument. It provides an effective method for simultaneous measurement of multiple elements.
【作者单位】：长春光机医疗仪器有限公司;中国科学院长春光学精密机械与物理研究所;中国科学院大学;
【基金】：国家自然科学基金资助项目(No.61108032) 国家重大科研装备研制资助项目(No.ZDYZ2008-1) 中国科学院重大科研装备研制资助项目(No.YZ200804) 国家重大科学仪器设备开发专项资助项目(No.11YQ120023) 吉林省重大科技攻关项目(No.09ZDGG005)
【分类号】：TH744.1

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