Resonance Ionization Detection of Hazardous Emissions

危险排放物的共振电离检测

• 批准号: 9218398
• 负责人: Terrill Cool
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-01 至 1997-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9218398&HistoricalAwards=false
• 关键词: Resonance; Ionization; Detection; Hazardous; Emissions

Investigation of the use of resonance-enhanced multiphoton ionization spectroscopy and time-of-flight mass spectrometry (REMPI/TOFMS) for the continuous monitoring of stack gas emissions from hazardous waste incinerators will be carried out. In this program, the potential of the REMPI/TOFMS method for repetitive on-line monitoring of numerous species chosen from a list of currently identified surrogates will be investigated; the effort will combine detailed spectroscopic measurements of fundamental importance in understanding molecular structures with measurements of detection limits and selectivities needed for practical application of the technique. The apparatus to be used is a prototype of a potential portable sampling and detection system envisioned for on-line real-time monitoring at an incineration facility. Particular emphasis will be placed on one- and two-color REMPI spectroscopic studies of chlorinated polycyclic aromatics; analyses of the vibronic spectral signatures of these species will be carried out. Since formation and destruction of congeners of the chlorinated dibenzodioxins and dibenzofurans are expected to follow siminar pathways, spectroscopy of the less toxic, more abundant mono- and di-chlorinated species will receive high priority. Due to the importance of chlorinatef congeners of phenol as precursors to the formation of PCDDs and PCDFs, studies of detection limits and sensitivities for mono- and di-chlorinated phenols will also be carried out. Selectivity and detection limit measurements for two-color R2PI of biphenyl, p-dichlorobiphenyl, phenylphenol(4-hydroxybiphenyl), chloro-phenylphenon, phenanthrene, anthracene, and pyrene will also be made. Finally, studies of REMPI spectroscopy of dibenzo-p-dioxin, dibenzofuran, and several of their mono- and di-chlorinated congeners will be carried out. The spectral sensitivity of REMPI, realizable with jet-cooling of the sample, eliminates the need for time-consuming capillary column sample separation of conventional GC/MS analysis procedures which are considered to be impractical for use in continuous emission monitoring of incinerator effluents. It is anticipated that the potential of REMPI/TOFMS for real-time on-line repetitive monitoring of trace concentrations of wide classes of chlorinated organics, including polycyclic aromatic compounds, may help address current public health concerns and produce more effective and simplified licensing procedures for incinerators.

共振增强多光子技术的应用研究 电离光谱和飞行时间质谱 （REMPI/TOFMS）用于烟道气的连续监测 危险废物焚化炉的排放物将 出去 在本程序中，REMPI/TOFMS方法的潜力， 用于对所选的多种物种进行重复在线监测， 从目前确定的代理人名单中 这项工作将结合联合收割机详细的光谱技术， 对理解具有根本重要性的测量 分子结构与检测限的测量， 实际应用所需的选择性 法 所使用的装置是一种 设想的潜在便携式采样和检测系统 用于焚烧设施的在线实时监测。 将特别强调单色和双色REMPI 氯化多环芳烃的光谱研究; 分析这些物种的振动光谱特征 将被执行。 自形成和毁灭以来， 氯化二苯并二恶英和二苯并呋喃的同系物 预计将遵循siminar途径， 毒性较低，单氯化物和二氯化物含量更高 将得到高度重视。 由于重视 氯化苯酚同系物作为形成的前体 多氯二苯并对二恶英和多氯二苯并呋喃的含量、检测限研究和 对一氯酚和二氯酚的敏感性也将 执行。 选择性和检测限测量 对于联苯、对二氯联苯、 苯基苯酚（4-羟基联苯），氯-苯基苯酚， 还将产生菲、蒽和芘。 最后，对二苯并二恶英的REMPI光谱进行了研究， 二苯并呋喃及其若干单氯化和二氯化 将进行同源物。 REMPI的光谱灵敏度，可通过喷射冷却实现 的样品，消除了耗时的 常规GC/MS毛细管柱样品分离 被认为是不切实际的分析程序， 用于焚烧炉排放物的连续监测 污水 预计， REMPI/TOFMS实时在线重复监测 多种氯化有机物的痕量浓度， 包括多环芳香化合物，可能有助于解决 当前的公共卫生问题并产生更有效和 简化焚化炉的发牌程序。