# Alberta Purchasing #ACAN 2026-0152

University of Alberta proposed single-source purchase of an Aerodyne Vocus CI-ToF-MS system

**Posted:** September 28, 2026
**Respond By:** October 06, 2026
**Identifier:** ACAN 2026-0152
**NAICS:** 334516

The University of Alberta proposes a single-source purchase of a specialized mass spectrometer for real-time atmospheric research.
- **Buyer:** University of Alberta; no sub-agency or purchasing-office details are provided.
- **OEM and vendor:** **Aerodyne Research Inc.** is the only named manufacturer/vendor and is identified as uniquely qualified for this requirement.
- **Product requested:** One Vocus Chemical Ionization Time-of-Flight Mass Spectrometer (Vocus CI-ToF-MS System). No part number or quantity is specified.
- **Capabilities and notable requirements:** Designed for direct, real-time trace-gas and aerosol monitoring in ambient air, with high mass resolution, sub-pptv detection, and field-deployable mobility. The notice also highlights bipolar ion measurement, concurrent gas- and aerosol-phase analysis, and rapid switching between proton-transfer-reaction (PTR) and chemical-ionization (CI) modes.
- **Procurement rationale:** The proposed direct award is based on the system’s technical capabilities and Aerodyne’s asserted unique qualification; no attachments or separate service requirements are identified.

### Description

The University of Alberta proposes a single-source acquisition of the Vocus Chemical Ionization Time-of-Flight Mass Spectrometer (Vocus CI-ToF-MS System) from Aerodyne Research Inc. The system will support direct, real-time trace gas and aerosol monitoring in ambient air, with sub-parts-per-trillion detection capabilities. The notice describes specialized features including bipolar ion measurement, concurrent gas- and aerosol-phase analysis, field-deployable mobility, rapid switching between PTR and CI ionization modes, and high mass resolution. The source states that Aerodyne is uniquely qualified to meet the required scientific criteria.

[View original listing](https://purchasing.alberta.ca/posting/AB-2026-06561)