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Empower ToF technology with soft ionization of airborne molecules

Newly designed SUPER SESI for Sciex MS*



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  • Sciex mass spectrometers incorporate a curtain plate that produces a counterflow gas, which prevents humidity from entering in the Q-jet region.

  • The counterflow gas can severely affect the performance of the SESI ionization. It can cause strong temperature gradients, which can have a negative impact on the stability of the eletcrospray, and memory effects of low volatility species.



In order to accommodate the counterflow, SUPER SESI for SCIEX incorporates an extra heater floating at high voltage.

  • This provides a uniform temperature

  • The uniform temperature eases modelling and numerical optimization

  • The internal geometry is optimized to maintain a laminar configuration despite the counterflow

The resulting configuration applies all principles and advantages of the SUPER SESI configuration*:

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Thermal optimization

SUPER SESI for Sciex incorporates a redesigned curtain plate with a heat exchanger that floats at high voltage.
This provides a high uniform temperature:

  • Improved electrospray stability

  • Better control of ionization conditions

  • Improved background levels


Improved memory effects

Reduced background levels

  • Uniform and high temperature to eliminate cool spots and deposition of low volatility species

  • Reduced exposed area

  • Transfer line and ionizer made of silica coated SS-316, and teflon encapsulated seals

  • New counterflow gas heater design impedes the entrance of sample gas even if unexpected high flows are introduced

  • All parts are easily accessible for cleaning

  • Reversed flow to reduce internal background contamination

  • Continuous cleaning

  • Steam-desorption cleaning

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Improved ionization efficiency

The internal geometry is optimized to maintain a stable laminar configuration with the electrode-less configuration:

  • Minimum dilution of neutral species

  • Maximum the flow of ions passed to the MS

  • Low exposed area