国防科技大学学报2025，Vol.47Issue(5)：34-40,7.DOI:10.11887/j.issn.1001-2486.24100006
门控PMT联用LIBS技术的高速采集系统研发及其应用
Development and application of high speed acquisition system based on gated PMT and LIBS technology
摘要
Abstract
LIBS(laser induced breakdown spectroscopy)combined with the signal acquisition device of gated PMT(photo multiplier tube)technology is one of the key components that affect the miniaturization and integration of the LIBS analysis system.Therefore,a 12 bit PMT signal high-speed acquisition system with a 7.6 MHz acquisition frequency was designed and implemented using a microcontrol chip and an AD9226 chip.The element lead(Pb)and chromium(Cr)were quantitatively analyzed.The experimental results show that LIBS combined with Gated-PMT analysis system adopts high-speed acquisition system to establish Pb,Cr element calibration curve fitting degree is 0.988,0.978,relative standard deviation is 3.56%,6.57%,detection limit is 0.013 mg/L and 0.087 mg/L,respectively.Compared with the LIBS detection technology without PMT,it is an order of magnitude lower.Compared with inductively coupled plasma-mass spectrometry,the relative errors of Pb solution with 7.0 mg/L and Cr solution with 0.7 mg/L were 2.81%and 3.26%,respectively.Therefore,the PMT signal high-speed acquisition system has a good quantitative effect in the LIBS analysis of heavy metals in aqueous solutions,and has the advantages of small size,low power consumption and low cost,which is conducive to further promoting the application of LIBS technology in the field of water quality heavy metal detection.关键词
激光诱导击穿光谱/门控光电倍增管/高速采集系统Key words
laser induced breakdown spectrum/gated photomultiplier tube/high speed acquisition system分类
数理科学引用本文复制引用
施佳明,闫子琪,郭连波,黄伟华,欧阳智勇,马洪华,陶智勇,聂俊飞..门控PMT联用LIBS技术的高速采集系统研发及其应用[J].国防科技大学学报,2025,47(5):34-40,7.基金项目
国家自然科学基金资助项目(52207167,52477112) （52207167,52477112）
