Abstract
Study of an electron attachment spectroscopy technique using an electron capture detector A new modified electron attachment spectroscopy technique is described. The energy of electrons is varied by means of radiofrequency voltage superimposed on the d.c. voltage of a capture detector in the range of 0.04 to 0.5 eV for nitrogen and 0.04 to 2.8 eV for argon—nitrogen as carrier gases. Plotting the electron capture coefficients against the mean electron energies one obtains electron attachment spectra of gas chromatographically separated compounds. The results are in a good agreement with other workers' measurements. It is shown that the selectivity and sensitivity of the d.c. detector increase considerably up to maximal values, which correspond to a maximum in the energy dependence of the capture cross-sections of the molecule.
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