Thermal effects on electrospray ionization ion mobility spectrometry

Chen, Yong Hong; Hill, Herbert H.; Wittmer, D.P.

doi:10.1016/0168-1176(96)04370-4

Cited by 44 publications

(34 citation statements)

References 10 publications

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“…7,8 The high pressure in the discharge gap is a great disadvantage of the corona source if it is connected to a low pressure detection system, but it could be an advantage if such a type of ion source were connected to a high pressure ion mobility spectrometer (IMS). [9][10][11] One would expect that the corona discharge would be an ideal source for IMS but some properties of the corona discharge also make this task rather complicated.…”

Section: The [H 3 O]mentioning

confidence: 99%

Generation of [H3O]+.(H2O)n clusters by positive corona discharge in air

Pavlik

Skalný

1997

Rapid Commun. Mass Spectrom.

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A mass spectrometric study of ions extracted from DC positive corona discharges in ambient air has been carried out within the air pressure range of 2.5 kPa-20 kPa. The multicomponent character of the mass spectra was confirmed. The dominant series of ions observed in the mass spectra were of the type [H 3 O] + .(H 2 O) n especially in the low current regime. In the high current regime, or 'streamer' regime of the corona discharge, atomic nitrogen and oxygen ions were also discovered, but the intensities of these were relatively low in comparison with the intensities of peaks corresponding to the molecular ions. A new mechanism responsible for the disappearance of [O 2 ] + and its hydrated forms from the mass spectra is given. This is based on the set of stepwise processes originated by the three-body process:The model is also capable of explaining some other phenomena initiated by the presence of water in the air, as well as the effects observed in dry air.

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Section: The [H 3 O]mentioning

confidence: 99%

Generation of [H3O]+.(H2O)n clusters by positive corona discharge in air

Pavlik

Skalný

1997

Rapid Commun. Mass Spectrom.

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“…Thermal factors may affect the needle operation in a negative fashion; therefore, a cooled electrospray source is needed to minimize corona discharge and eliminate solvent evaporation within the needle. 23 The design and assembly of the cooled ESI source used in this experiment were conducted in our laboratory. The ion source is constructed out of a hollow, cylindrical Teflon sheath, a smaller diameter alumina tube, and the electrospray needle.…”

Section: Esimentioning

confidence: 99%

Evaluation of sulfonylurea herbicides using high resolution electrospray ionization ion mobility quadrupole mass spectrometry

Clowers

Steiner

Dion

et al. 2001

Field Analytical Chem & Tech

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Abstract:The purpose of the current study was to explore and assess the potential of high resolution electrospray ionization atmospheric pressure ion mobility spectrometry (ESI-AP-IMS) as a field analytical method for the detection and identification of mixtures of sulfonylurea (SU) herbicides in aqueous samples. Because of increased usage, persistent behavior, and potential for crop damage, an environmental method of analysis capable of evaluating SU herbicides in a swift and effective manner is necessary. Eight SU herbicides were evaluated using ESI-AP-IMS quadrupole mass spectrometry. The selected herbicides were chosen based upon availability and scope of use. The SU herbicide species were qualitatively identified using quadrupole mass spectrometry, followed by the determination of reduced mobility values for characteristic ions. Various mixtures of rimsulfuron, metsulfuron-methyl, prosulfuron, sulfometuron-methyl, tribenuron-methyl, and primisulfuron-methyl could be revealed using AP-IMS. The ease of use, ability to operate under ambient conditions, and relatively rapid data acquisition times make ESI-AP-IMS an attractive candidate for the analysis of aqueous environmental field samples. C

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“…It has been used to detect drugs, chemical warfare agents, explosives and environmental pollutants. 5,6 Several groups have used mobility measurements to characterize the size distribution of aerosol particles and small metal particles. 7,8 In addition to information about ion mobilities, drift tube studies can provide information about ionÈmolecule reaction kinetics and equilibria.…”

Section: Introductionmentioning

confidence: 99%