Dwell Volume

SSlahck
SSlahck
in Instrumentation and Mass Spectrometry
<p><span>What is the dwell volume of the nanoAcquity? I believe sometimes it is defined as the volume in the system after the gradient is formed.</span></p>

Answers

  • JeanL
    JeanL

    Dwell volume or system volume specification for an HPLC or UPLC system is the volume from where the gradient is formed to the inlet of the column. However, for the user the gradient delay is the volume or time required for the gradient to get through the system and the column(s) to the detector or mass spectrometer. In the case of nanoACQUITY, the dwell volume is <1uL. I estimate the total volume of system volume, trap and analytical columns (Vo), connecting tubing, and Universal sprayer to be ~1.8uL.

  • lizh
    lizh

    Waters cites that the volume of the nanoACQUITY UPLC system is < 1 uL from point of gradient mixing to the head of the column, loop off-line. (i.e. trap column volume is not included).

  • lizh
    lizh

    I believe that Jeanne's answer is as comprehensive as it gets!

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