Without column or back pressure, the solvent is siphoned, what should I do?
Concerned instruments: puriFlash 215, puriFlash 430, puriFlash 450, puriFlash 4100, puriFlash 4250
At low flow rates <1.5 ml/min. without column (back pressure), the solvent may be siphoned, thus disrupting measurements.
If you fit a column (or more generally a back pressure), you will once more obtain a correct flow.
See our OQ.