Mass spectra of some deuterated ethanes. I. The effect of ionizing voltage

Abstract

The mass spectra of seven ethanes (d 0 –d 6 ) have been obtained at various ionizing voltages. For low ionizing voltages (i.v. < 13.4 V), the only remaining ions are the parent molecule ion and that resulting from the loss of two hydrogen atoms (m/e 30 and m/e 28 in C 2 H 6 ). With the exception of C 2 H 5 D, the ratio of the ion currents for these species remained reasonably constant below i.v. = 13.0. The sensitivity for detection of the molecule ion was found to decrease continuously as the D atom content was increased, both for high (70 V) and for low (12.8 V) ionizing voltages.