GC-ECD Cl-Pesticide

GC-ECD

Gas Chromatograph that uses ECD (Electron Capture Detector) as detector. Compound gets separated as per normal and in column. Halogenated Compound will be detected by ECD in the ECD cell and produce a signal.

In the cell, radioactive Ni-63 Emits β-particles (Electron), which will form an electron cloud in the ECD cell. Electrical Current (electron) passes through the cell to form a close circuit. When electronegative species (Cl-pesticide) passes through the cell, electrons are being captured, resulting in a decrease in electron. Electrical current is the flow of electron. When there is a decrease in electron, there is a decrease in electron flow, i.e. decrease in electrical current. Therefore when electronegative species are present, electrical current decreases, which will translate into a chromatogram.

GC-ECD is therefore good for detecting electronegative species, such as Halogenated compound, organochloro-pesticide.