Electron Capture Detector (ECD)

The Buck Electron Capture Detector can be operated with either nitrogen or argon-5% methane (P5) makeup gas, and nitrogen, P5, or helium carrier (as long as the helium flow is less than 10 milliliters per minute). The ECD may be thermostated from ambient to 375°C. Thermostatted from ambient to 375°C Offers extreme sensitivity down to 10 ppt Detects electronegative compounds Mandated for pesticides and PCBs The ECD detects electronegative compounds, especially chlorinated, fluorinated or brominated molecules such as carbon tetrachloride, bromoform, PCBs and pesticides such as DDT. The ECD offers extreme sensitivity (parts per trillion for SF6). This chromatogram shows the ECD response to a 200ppb pesticide sample.   Our ECD consists of a stainless steel cylinder containing radioactive Nickel-63. The Nickel-63 emits beta particles (electrons) which collide with the carrier gas molecules, ionizing them in the process. This forms a stable cloud of free electrons in the ECD cell. When el