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- W2940782005 abstract "Chemical ionization of organic compounds with negligible vapor pressures (VP) is achieved at atmospheric pressure when the proximal sample is exposed to corona discharge. The vapor-phase analyte is produced through a reactive olfaction process, which is determined to include electrostatic charge induction in the proximal condensed-phase sample, resulting in the liberation of free particles. With no requirement for physical contact, a new contained nano-atmospheric pressure chemical ionization (nAPCI) source was developed that allowed direct mass spectrometry analysis of complex mixtures at a sample consumption rate less than nmol/min. The contained nAPCI source was applied to analyze a wide range of samples including the detection of 1 ng/mL cocaine in serum and 200 pg/mL caffeine in raw urine, as well as the differentiation of chemical composition of perfumes and beverages. Polar (e.g., carminic acid; estimated VP 5.1 × 10-25 kPa) and nonpolar (e.g., vitamin D2; VP 8.5 × 10-11 kPa) compounds were successfully ionized by the contained nAPCI ion source under ambient conditions, with the corresponding ion types of 78 other organic compounds characterized." @default.
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- W2940782005 date "2019-04-28" @default.
- W2940782005 modified "2023-09-24" @default.
- W2940782005 title "Reactive Olfaction Ambient Mass Spectrometry" @default.
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- W2940782005 doi "https://doi.org/10.1021/acs.analchem.9b00857" @default.
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