燕山大学学报2015，Vol.39Issue(6)：511-515,5.DOI:10.3969/j.issn.1007-791X.2015.06.007
激光解吸/激光电离-质谱法二恶英及其关联物的在线检测
Online detection of dioxin and dioxin-related substances using laser desoption/laser ionization-mass spectrometry
摘要
Abstract
A direct injection method with a capillary was utilized to realize the cooling and condensing effect of the molecules of the carrier gas and the gas samples.The molecules concentrated on the capillary port were introduced into the mass spectrometer with a desorption laser, and then ionized by a femtosecond laser with a resonance-enhanced two-photon ionization process which can increase the sensitivity. The online analysis condition of the p-cholorophenol and pentachlorobenzene altogether 5 compounds was confirmed by checking the capillary heating temperature, desorption laser energy and the time delay between desorption laser and the ionization laser.Compared with the traditional continuous introduction mode, pulse introduction method can reduce the detection limits because of the condensing step.关键词
二恶英/在线检测/激光解吸/多光子电离/电离效率Key words
dioxin/online analysis/laser desorption/multiphoton ionization/ionization efficiency分类
化学化工引用本文复制引用
李阿丹,洪伟,王晶..激光解吸/激光电离-质谱法二恶英及其关联物的在线检测[J].燕山大学学报,2015,39(6):511-515,5.基金项目
河北省自然科学基金资助项目( B2014203137 ) （ B2014203137 ）
燕山大学青年教师自主研究计划课题(13LGA014) （13LGA014）
