基于数字微镜器件的原子荧光色散检测技术研究  

Research on Dispersive Detection Technology Based on Digital Micromirror Device by Atomic Fluorescence Spectrometry

作　　者：陶琛 李春生[1] 王宏霞[1] 张雅茹 赵成威 周志恒 马振予 田地[1] TAO Chen;LI Chun-Sheng;WANG Hong-Xia;ZHANG Ya-Ru;ZHAO Cheng-Wei;ZHOU Zhi-Heng;MA Zhen-Yu;TIAN Di(College of Instrumentation&Electrical Engineering,Jilin University,Changchun 130023,China;Beijing Bohui Innovation Optoelectronic Technology Co.,Ltd,Beijing 102206,China;Grating Technology Laboratory,Changchun Institute of Optics and Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]吉林大学仪器科学与电气工程学院,长春130026 [2]北京博晖创新光电技术股份有限公司,北京102206 [3]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《分析化学》2018年第12期1878-1885,共8页Chinese Journal of Analytical Chemistry

基　　金：国家重点研发计划重大科学仪器设备开发专项基金项目(No.2016YFF0103303)资助~~

摘　　要：基于氢化物发生-原子荧光光谱法(HG-AFS)研制了一套由数字微镜器件(Digital micromirror device,DMD)作为空间光调制器、光栅作为分光器、光电倍增管(Photomultiplier Tubes,PMT)作为检测器的紫外DMD光谱仪。通过采用高紫外透射率DMD和改进信号采集系统等方式,提高光谱仪对180～320 nm范围内微弱荧光信号的检测能力。在实验平台上,对DMD的翻转控制参数和PMT负高压进行了优化,并对4种元素(As、Sb、Bi、Hg)的发射谱线和激发荧光进行了分析,对由空心阴极灯造成的光源散射干扰进行了讨论。结果表明,紫外DMD光谱仪初步实现了对HG-AFS荧光信号的检测和分析。此仪器具有结构简单、不含宏观移动部件、检测速度快等优点,完成一次全谱扫描分析仅需要0.848 s。An ultraviolet(UV)digital micromirror spectrometer using a digital micromirror device(DMD)as a spatial light modulator,a grating as a spectroscope and a photomultiplier tube(PMT)as a detector,was specially designed for dispersive hydride generation atomic fluorescence spectrometry(HG-AFS).To improve detection ability of the spectrometer for weak fluorescence signals at 180-320 nm,a high UV transmittance DMD was used and the signal acquisition system was improved,the control parameters of DMD and PMT negative high voltage were optimized.The feasibility of the spectrometer was demonstrated with analyzing standard sample of As,Sb,Bi and Hg,the atomic emission and fluorescence spectra were obtained.The scattering interference caused by the light source was discussed.The results showed that the UV digital micromirror spectrometer had a preliminary ability for the excitation fluorescence analysis by HG-AFS.The UV digital micromirror spectrometer contained no moving parts,was simply structured,and speedy spectral analysis(0.848 s per spectrum scan).

关 键 词：氢化物发生-原子荧光光谱法 色散检测 数字微镜 数字微镜器件 

分 类 号：O657.31[理学—分析化学]