The electron capture detector is used for detecting electron-absorbing components (high electronegativity) such as halogenated compounds in the output stream of a gas chromatograph. The ECD uses a radioactive beta particle (electron) emitter in conjunction with a so-called makeup gas flowing through the detector chamber.

2023年1月5日 · 产生的离子流与进入火焰的有机物含量成正比，利用此原理可进行有机物的定量分析。一般的有机化合物在fid上都有响应，一般分子量越大，灵敏度越高。fid是gc基本的检测器。 2、 ecd检测器 ecd检测器全称电子捕获检测器，是一种灵敏度高，选择性强的检测器 ...

2013年7月11日 · 电子俘获检测器（ECD）是灵敏度最高的 气相色谱 检测器，同时又是最早出现的选择性检测器。 它仅对那些能俘获电子的化合物，如卤代烃、含N、O和S等杂原子的化合物有响应。 由于它灵敏度高、选择性好，多年来已广泛用于环境样品中痕量农药、多氯联苯等的分析。 其应用面仅次于TCD和FID，一直稳居第三位。 ECD是 气相 电离检测器之一，但它的信号不同于FID等其他电离检测器，FID等信号是基流的增加，ECD信号是高背景基流的减小。 ECD的不 …

若色谱模块为气相色谱（gc），检测器为质谱（ms），则称之为 气相色谱-质谱联用 ，简称“气质”，英文缩写为“gc-ms”。 若色谱模块为液相色谱（lc），检测器为质谱（ms），则称之为 液相色谱-质谱联用 ，简称“液质”，英文缩写为“lc-ms”。 总结

2019年7月1日 · The ECD (see Figure 1 for a schematic) is a selective detector that responds to electronegative analyte molecules capable of "capturing electrons"-more specifically, halogenated, organometallic and nitro-containing compounds.

法主要通过采用气相顶空法，选择电子捕获检测器（ECD） 对水中卤代烃进行分析，方法具有灵敏度高，重复性好， 回收率高，操作方便等优点。 实验材料 仪器与试剂： Trace 1310 GC气相色谱仪 ，配ECD 检测器 （Thermo Fisher Scientific）；Triplus RSH自动进样器 （Thermo Fisher

The Agilent micro-electron capture detector (micro-ECD), as part of an Agilent GC system, provides trace-level analysis of halogenated organic compounds and aromatic pollutants. Major design innovations neatly wrap ruggedness and reliability …

The Electron Capture Detector (ECD) in gas chromatography (GC) is employed to detect compounds capable of undergoing electron capture reactions, displaying heightened sensitivity towards electronegative elements like halogens, as well as …

Electron capture detector (ECD) In ECD the eluent from the GC column passes through a slow-electron beam. An analyte containing electronegative atoms such as nitrogen, ‘captures’ electrons from the constant electron current, producing a signal by decreasing this current. Sensitivity is usually in the picogram range.

2025年3月29日 · The simultaneous determination of CO 2, CH 4 and N 2 O in GHG samples by using a GC equipped with an ECD and FID detectors connected in series with a system of valves (GC-ECD/FID) has been demonstrated. This approach is a good option when a laboratory is considering the purchase of a gas chromatograph to analyze GHG, being more simple and less ...