Mass Spectrometry Laboratory

School Affiliated departments and LAS

College of Liberal Arts & Sciences

Atmospheric Pressure Chemical Ionization

Atmospheric pressure chemical ionization (APCI) generally produces protonated or deprotonated molecular ions from the sample via a proton transfer (positive ions) or proton abstraction (negative ions) mechanism. The sample is vaporized in a heated nebulizer before emerging into a plasma consisting of solvent ions formed within the atmospheric source by a corona discharge. Proton transfer or abstraction then takes place between the solvent ions and the sample. Eluent flows up to 2 ml/min can be accommodated without splitting the flow.

APCI Instrument: Quattro Ultima sample size: 1-300 pmole (ideally). If you don’t have 1 pmole, please check with lab staff and see if they can work out an accommodation.

University of Illinois at Urbana-Champaign
Mass Spectrometry Laboratory
35 Noyes Laboratory
MC-712 Box 51-1
505 South Mathews Ave.
Urbana, IL 61801
Furong Sun

tel: 217/333-2545
frs [at] illinois [dot] edu
Lab Hours: 24/7 access by key
Staff Available 8 am to 4:45 pm
Monday through Friday

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