It is well documented since the early days of the development of atmospheric pressure
ionization methods, which operate in the gas phase, that cluster ions are ubiquitous. This …

In this work, the characteristics of gas flow in inlet capillaries are examined. Such inlet
capillaries are widely used as a first flow restriction stage in commercial atmospheric …

Glass or metal inlet capillaries are commonly used for flow restriction in atmospheric
pressure ionization mass spectrometers. They exhibit a high ion transmission rate and …

RATIONALE The ionization mechanisms operative in negative ion atmospheric pressure
mass spectrometry are far from being properly understood. In an excess of oxygen …

We report on a novel method for atmospheric pressure ionization of compounds with
elevated electron affinity (eg, nitroaromatic compounds) or gas phase acidity (eg, phenols) …

Trace gases in the upper troposphere and the lower stratosphere (UTLS) strongly influence
our climate and even can affect tropospheric weather. Therefore a better understanding of …

Chemical ionisation (CI) is a widely used ionisation technique for mass spectrometer (MS),
forming predominantly molecular ions and/or protonated ions. With these ionic species, the …

Folie 1 Page 1 Introduction Conclusions Sonja Klee; Valerie Derpmann; Hendrik Kersten;
Walter Wißdorf; David Müller; Yessica Brachthäuser; Sebastian Klopotowski; Klaus …

Folie 1 Page 1 60 80 100 120 140 160 180 200 0 2 4 6 8 10 12 50 100 150 200 250 300 0 2 4
6 8 10 12 50 100 150 200 250 300 0 1 2 3 4 5 6 7 0.0 0.5 1.0 1.5 2.0 0 2e+4 4e+4 6e+4 8e+4 …

In this work, the interactions of ions and neutral species in the gas phase are studied from
selected points of view. These interactions are important in most analytical methods …