改造的平面光栅直读光谱仪在测定化探样品中银硼锡元素的应用

Application of Modified Plane Grating Direct-Reading Spectrometer in Determination of Silver, Boron and Tin in Geochemical Samples

摘要: 平面光栅摄谱仪是地球化学普查样品中，测定银、硼、锡等元素常用的仪器.为提高分析效率和质量，2015年我单位将二米平面光栅摄谱仪改造为CCD-Ⅰ型平面光栅直读光谱仪.改造后的仪器检测限为Ag：0.013 μg/g，Sn：0.43 μg/g，B：0.71 μg/g.精密度（RSD%，n=12）均小于10%，测定国家一级标准物质结果与标准值相符，完全满足地球化学普查样品中银、硼、锡等元素的分析要求.

Abstract: Plane grating spectrograph is commonly used in the determination of silver (Ag), boron (B) and Tin (Sn) in geochemical samples. In this work, a CCD-Ⅰplane grating direct-reading spectrometer has been successfully developed to replace the two-meter plane grating spectrograph so as to improve the efficiency and quality of analysis. The detection limits of the updating instrument for Ag, B and Sn were 0.013, 0.71 and 0.43 μg/g, respectively. The relative standard deviations (RSDs n=12) were less than 10%.The analytical accuracy was validated by the national standards and the results are in agreement with the certified values.The proposed method can meet the requirements for the determination of Ag, B and Sn in geochemical samples.