Direct detection of solid inorganic mercury salts at ambient pressure by electron-capture and reaction-assisted HePI mass spectrometry

Sathis S. Weerasinghe, Julius Pavlov, Yong Zhang, Athula Attygalle

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Solid HgCl2 is readily detected at ambient conditions by electron capture in a HePI-MS source. The captured electron occupies the empty 6 s orbital of the Hg atom. The resulting radical-anion HgCl2 -• can exist as three "flexomers" of different Cl-Hg-Cl angle. The facile in-source formation of HgCl2 -• and the adduct [HgCl3]- is exploited to detect other solid Hg compounds by exposing them to an external chloride source, such as HCl, NaCl, or vapors emanating from solid TiCl3. In situ oxidation of Hg2Cl2 with H2O2 generated signals for HgCl2 -• and [HgCl3] -, suggesting that oxidation makes Hg 6 s orbital available for electron capture.

Original languageEnglish (US)
Pages (from-to)149-153
Number of pages5
JournalJournal of the American Society for Mass Spectrometry
Volume25
Issue number1
DOIs
StatePublished - Jan 1 2014

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Mercuric Chloride
Mercury
Mass spectrometry
Mass Spectrometry
Salts
Electrons
Pressure
Oxidation
Anions
Chlorides
Vapors
Atoms

All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Spectroscopy

Cite this

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abstract = "Solid HgCl2 is readily detected at ambient conditions by electron capture in a HePI-MS source. The captured electron occupies the empty 6 s orbital of the Hg atom. The resulting radical-anion HgCl2 -• can exist as three {"}flexomers{"} of different Cl-Hg-Cl angle. The facile in-source formation of HgCl2 -• and the adduct [HgCl3]- is exploited to detect other solid Hg compounds by exposing them to an external chloride source, such as HCl, NaCl, or vapors emanating from solid TiCl3. In situ oxidation of Hg2Cl2 with H2O2 generated signals for HgCl2 -• and [HgCl3] -, suggesting that oxidation makes Hg 6 s orbital available for electron capture.",
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AU - Pavlov, Julius

AU - Zhang, Yong

AU - Attygalle, Athula

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AB - Solid HgCl2 is readily detected at ambient conditions by electron capture in a HePI-MS source. The captured electron occupies the empty 6 s orbital of the Hg atom. The resulting radical-anion HgCl2 -• can exist as three "flexomers" of different Cl-Hg-Cl angle. The facile in-source formation of HgCl2 -• and the adduct [HgCl3]- is exploited to detect other solid Hg compounds by exposing them to an external chloride source, such as HCl, NaCl, or vapors emanating from solid TiCl3. In situ oxidation of Hg2Cl2 with H2O2 generated signals for HgCl2 -• and [HgCl3] -, suggesting that oxidation makes Hg 6 s orbital available for electron capture.

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