原子荧光光谱仪中汞灯的温控效应研究  

Research on temperature control effect of mercury lamp in atomic fluorescence spectrometer

作　　者：胡伟康 马景治 张飞鸽 张响荣 童铄云 HU Wei-kang;MA Jing-zhi;ZHANG Fei-ge;ZHANG Xiang-rong;TONG Shuo-yun(Key Laboratory of Rare and Sparse Rare Earth Mineral Resources,Ministry of Land and Resources,Hubei Geological Research Laboratory,Wuhan 430034,China;Key Laboratory of Gold Mineralization Processes and Resources Utilization,Ministry of Land and Resources,Shandong Key Laboratory of Mineralization Geological Process and Resources Utilization in Metallic Minerals,Jinan 250013,China)

机构地区：[1]自然资源部稀土稀有稀散矿产重点实验室,湖北省地质实验测试中心,湖北武汉430034 [2]自然资源部金矿成矿过程与资源利用重点实验室,山东省金属矿产成矿地质过程与资源利用重点实验室,山东济南250013

出　　处：《现代化工》2023年第9期222-226,共5页Modern Chemical Industry

基　　金：国家重点研发计划项目(2021YFC290300405);国家自然科学基金(42003017);自然资源部金矿成矿过程与资源利用重点实验室和山东省金属矿产成矿地质过程与资源利用重点实验室开放基金(KFKT202112);湖北省地质局科研项目(KJ2023-40,KCDZ2023-22,KJ2023-38,KJ2022-35)。

摘　　要：针对原子荧光光度计测定汞时极易出现所需预热时间长、仪器稳定性差、荧光值漂移等问题,使用了自制高强度空心阴极汞灯控温装置。自制温控装置通过温度补偿模块可实现±0.3℃范围内的精确控温,提高仪器稳定性。结果表明,将温度控制在30~40℃且灯电流小于20 mA时,仪器测量受温度变化的影响相对较小,可以明显改善仪器的信噪比,有助于提升测定汞的数据精准度。此外,由本研究中的实际样品测试结果可见,将汞灯控制在35℃左右范围内,测试值的精密度与准确度最佳。Atomic fluorescence spectrophotometer is prone to suffer the problems such as long preheating time,poor instrument stability,and fluorescence value drift when measuring mercury.A self-made high-strength hollow cathode mercury lamp temperature control device is employed to solve these problems.This temperature control device can achieve the accurate temperature control within±0.3℃through the temperature compensation module,thus improving the stability of the instrument.It is shown that the measurement of the instrument is less affected by the temperature change when the temperature is controlled at 30-40℃and the lamp current is less than 20 mA.It can also significantly improve the signal-to-noise ratio of the instrument,which helps to enhance the accuracy of the data for the determination of mercury.In addition,it can be seen from the actual sample test results that the test values are the best precision and accuracy if the mercury lamp in controlled at around 35℃.

关 键 词：原子荧光光谱 汞灯 温度控制 温控效应 信噪比 

分 类 号：O657.3[理学—分析化学]