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Facile Atmospheric Generation of Water Radical Cations via TiO 2 ‐Nanoneedle Arrays for Aromatic Hydrocarbon Detection Based on Corona Discharge
Author(s) -
Mi Dongbo,
Cui Jinhaojie,
Kuang Siliang,
Dong Xiaofeng,
Lu Haiyan
Publication year - 2021
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.12220
Subject(s) - chemistry , mass spectrometry , ion , nanoneedle , analytical chemistry (journal) , corona discharge , atmospheric pressure , ion trap , ionization , tandem mass spectrometry , polycyclic aromatic hydrocarbon , hydrocarbon , tandem , chemical ionization , proton affinity , environmental chemistry , nanotechnology , organic chemistry , chromatography , materials science , electrode , oceanography , geology , nanostructure , composite material , protonation
Water radical cations, (H 2 O) n +• , have attracted considerable attention owing to their potential practical applications in analytical chemistry, structural chemistry, radiotherapy, and radiochemistry. Recently, atmospheric pressure chemical ionization has emerged as a versatile method for direct mass spectrometric analysis. Usually, H 3 O + is the major proton donor during ionization and only the pseudo molecular ion peaks, instead of molecular ions are detected. In this work, (H 2 O) 2 +• ions with high oxidizability and reactivity were generated using hydrothermally grown TiO 2 nanoneedle arrays in combination with a linear ion trap mass spectrometer under low operating voltage and applied to the direct mass spectrometric analysis of a mixture of volatile aromatic hydrocarbons. (H 2 O) 2 +• ions were generated with a high absolute ion current of up to 1.07 × 10 5 counts/s at atmospheric pressure. Using the generated (H 2 O) 2 +• as the primary ion permitted the tandem mass spectrometric analysis of a mixed vapor sample of aromatic hydrocarbons.