The Helios mass cytometer analyzes individual cells labeled with stable heavy metal isotypes using Time-of-Flight Inductively Coupled Plasma mass spectrometry. The Helios
can simultaneously resolve 30-40 multiple elemental probes on a per-cell basis without the need for spillover compensation between channels.
Essential Steps for Success
- Environmental contaminants contain metals that will be detected by the Helios. Common detergents frequently contain Barium. Avoid using plastic or glassware that has ever been washed with detergent..
- Use only reagents that have been verified to be metal-free.
- Filter all home-made reagents using 0.2 um filters.
- Use only ultrapure Millique water for reagents.
- When compared to standard flow cytometry, cell loss is greater in Helios experiments due to the multiple wash steps required in staining, resuspension of fixed cells in water prior to introduction into the system, and loss of cells within the Helios instrument. Plan on staining more cells than you would need for a traditional flow cytometry experiment.