The Nickel-63 emits beta particles (electrons) which collide with the carrier gas molecules, ionizing them in the process. Our ECD consists of a stainless steel cylinder containing radioactive Nickel-63. This chromatogram shows the ECD response to a 200ppb pesticide sample. The ECD offers extreme sensitivity (parts per trillion for SF 6). The ECD detects electronegative compounds, especially chlorinated, fluorinated or brominated molecules such as carbon tetrachloride, bromoform, PCBs and pesticides such as DDT. The ECD may be thermostated from ambient to 375☌. 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).
Pre-configured Gas Chromatograph Systems.
