Analysis of low molecular weight perfluoroalkanes by gas chromatography with helium ionization detection

Highly fluorinated stationary phases for analysis for polyfluorinated solutes by reversed-phase high-performance liquid chromatography

“…Gas chromatography (GC) is the most common method for analyzing PFCs (8), although their detection through flame ionization or electron capture is sometimes difficult, due to their thermal stability (9). The preferential interaction of PFCs with perfluorinated stationary phases has been pointed out (10).…”

Effect of positive ion/molecule reactions on the response of the electron capture detector to anthracene

“…Also, it has been shown that if oxygen is present in the carrier gas, an altered response to some samples can occur due to the negative ion/molecule reactions of 02" (2). While these additional means of affecting electron density in atmospheric pressure ionization cells can be used to advantage for analysis (3,4), the most frequent uses of these devices today remain those where the electron capture reaction provides the basis for the response. Thus, in order to simplify the response of the ECD as much as possible, the reaction conditions which minimize the effects of all additional, non-EC processes have been sought.…”

Standardization of helium carrier gas for helium detector applications

“…Addition of a small concentration of gaseous additive will provide a positive response to all gases and compounds tested (3)(4)(5). Recently the HID was operated in the saturation region of the detector field intensity to provide a sensitive and reliable response (6, 7). In this work the detector was operated with a high-purity grade of helium (minimum purity of 99.995%) and the detector response was positive for all gases and compounds tested except neon.…”