摘要
直接电离质谱技术在现场快速检测领域具有重要应用价值。离子源是直接电离质谱仪的核心部件,对离子源进行优化设计是提升仪器性能的关键。设计了一种并行电喷雾离子源,基于三根探针并列排布、按序电喷雾,解决单探针电喷雾稳定性差、信号波动大的问题。通过试验优化喷针材料,基于不锈钢材质的优异导电性,快速消散表面电荷,抑制因表面电势波动引起的电场畸变,解决玻璃材质毛细探针针尖普遍存在的电荷累积问题。通过设计降低多探针喷雾过程中的空间位阻效应,减少电场交叠干扰,将喷雾角度偏移量控制在5°内,并使信号强度相对标准偏差减小至8.73%。
Direct ionization mass spectrometry technology has important application value in the field of rapid on-site detection.The ion source is the core component of the direct ionization mass spectrometer,and optimizing the design of the ion source is the key to improving instrument performance.A parallel electric spray ion source was designed,and the problems of poor stability and large signal fluctuation of single probe electric spray were solved based on the parallel arrangement of three probes and sequential electric spray.By optimizing the nozzle material through experiment,based on the excellent conductivity of stainless steel material,the surface charge can be quickly dissipated to suppress the electric field distortion caused by surface potential fluctuation and solve the common problem of charge accumulation in the tip of glass capillary probe.Through design,the steric hindrance effect and electric field overlapping interference in the multi probe spray process were reduced,and the spray angle offset was controlled within 5 to reduce the relative standard deviation of signal strength to 8.73%.
作者
俞云曦
杨俊
陈安琪
Yu Yunxi;Yang Jun;Chen Anqi
出处
《机械制造》
2025年第11期29-31,28,共4页
Machinery
基金
浙江省“尖兵”“领雁”研发攻关计划项目(编号:2023C03103)。
关键词
离子源
电喷雾
设计
试验
Ion Source
Electric Spray
Design
Experiment
