O2 Seminar - 26 November 2025 / 18.11.2025

You are kindly invited to attend the upcoming O2 Seminar. Prof. Alexei Khalizov from the New Jersey Institute of Technology will present his recent work on chemical speciation of atmospheric oxidized mercury.

Please find the seminar details below.

📅 Wednesday, 26 November 2025
🕐 13:00 (1 PM)
📍 O2 Lecture Room and on Zoom:
https://zoom.us/j/94990507554?pwd=CAwqS3azlDigfqwpwGu3hTuGDlLHBD.1

Lecturer: Prof. Alexei Khalizov
Title: Addressing the Challenge of Chemical Speciation of Atmospheric Oxidized Mercury

Abstract:
The oxidation state and chemical speciation of atmospheric mercury strongly influence its atmospheric lifetime, yet Hg(II) speciation remains poorly understood due to its extremely low abundance and chemical lability. In this seminar, Prof. Khalizov will present complementary methods developed to address this challenge. These include a chemical-ionization mass-spectrometric technique capable of direct, online detection of gas-phase Hg(II) at ~100 pptv, with significant potential for improved sensitivity, and an indirect approach based on pre-concentration on tunable substrates followed by reactive paper-spray ionization mass spectrometry. Together, these methods enable molecular characterization of Hg(II) in samples containing as little as 1–2 ng and open new possibilities for experimental investigation of atmospheric Hg(II) speciation.

You are warmly invited to attend.