Chromatotron

Maintain the Teflon lid clean. Large particles of dust on either side of the
Teflon sheet, near the edge or in the corresponding recess in the main vessel,
will cause solvent vapor leaks. A moist, soft paper towel or cloth will remove
dust with a minimum of scratching.
THE TEFLON FUNNEL AND SOLVENT INLET
Set the funnel holder in a stand to place the stopcock 55 cm above bench
level. Screw the inlet fully down into the holder in the Teflon lid and choose an
inlet stopper stamped with a numeral (1, 2, or 4) corresponding to the sorbent
layer thickness (in mm) to be used. The funnel height, together with the
stainless steel capillary tubing in the inlet stopper, controls the solvent flow rate
to that required for the particular sorbent layer thickness used. If for some
special purpose the flow rate must be changed, adjust the funnel height.
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