Digital Revitalization of a Legacy Linear Ion Trap System.

Area of Science:

• Analytical Chemistry
• Mass Spectrometry
• Instrumentation

Background:

• Linear ion traps are versatile platforms for tandem mass spectrometry (MS) and ion chemistry research.
• Commercial availability of linear ion traps has declined, with high costs and maintenance hindering access.
• There is a need for low-cost, functional instrumentation for education and non-high-throughput research.

Purpose of the Study:

• To demonstrate a cost-effective method for digitally revitalizing end-of-life linear quadrupole ion traps.
• To replace prohibitive factory electronics with readily available, lower-cost components.
• To enable digital control of the analyzing quadrupole using software-defined waveforms.

Main Methods:

• Removed original factory electronics and drivers from a linear ion trap.
• Replaced components with lower-cost, readily available alternatives.
• Implemented digital control of the analyzing quadrupole using the Astraea digital waveform generation platform.

Main Results:

• Achieved isotopic resolution of singly and doubly charged ions using a digital auxiliary waveform and duty cycle.
• Demonstrated mass-selective ion elimination via tunable auxiliary frequency.
• Successfully performed peptide ion fragmentation and MS/MS experiments using the digitally driven trap.

Conclusions:

• Digitally revitalizing end-of-life linear ion traps is a feasible and cost-effective approach.
• The software-defined, hardware-agnostic digital driver is adaptable to various quadrupole designs.
• This method provides a viable, low-maintenance option for advanced mass spectrometry applications.