Frequently Asked Question

Electron captured detectors (ECDs) are highly sensitive detectors used in gas chromatography that can detect compounds containing electronegative atoms, such as halogens (F, Cl, Br, I) and certain heteroatoms (N, O, S). ECDs utilize the principle of electron capture to generate a signal. When electronegative atoms in the sample molecule interact with the high-energy beta particles emitted by a radioactive source within the detector, they capture an electron, resulting in the formation of a negative ion. These negative ions are then collected and measured, providing a signal proportional to the concentration of the electronegative compounds in the sample. ECDs are commonly employed in various applications, including environmental monitoring, forensic analysis, and pharmaceutical research, for the detection of halogenated compounds, pesticides, and other compounds containing electronegative atoms.