Jepson Bolton's International Catalogue
Fraction Collection Buchi model B-684A robust, precision instrument suitable for virtually all types of fraction collection and capable of functioning equally well either as a stand alone unit or as the principal module in Buchi Chromatography systems. The collection process is on an elapsed time basis which can be preset from 1 second to 999 minutes per fraction. Three types of tube racks (supplied separately) are available for 20ml, 50ml and 250ml tubes respectively. A distribution plate is also available for collecting fractions of unlimited size. A three-way solenoid valve is employed to divert flow to waste during changeover.
The unit is equipped with three switched and three direct power output sockets to enable detectors, pump, gradient former etc. to be powered or controlled by the fraction collector. For precise control of peak separation and collection, the B-684 may be advantageously used in conjunction with the B-686 peak detector or any detector system having a 10mV output. Optional eluant level detectors may be employed to shut down the system in the event of solvent reservoirs running dry or overflowing.
The B-684 is supplied complete with power cables for auxiliary units, changeover valve and all necessary tubing and fittings but without racks and tubes which should be ordered separately.
Collection options 240 x 20ml tubes 120 x 50ml tubes 48 x 250ml tubes 1 to 4 distribution plates each with 12 positions Collection time per fraction 1 to 999 secs/mins Maximum throughput 200 ml/min Materials in contact with solvent PTFE, Kel-F, Kalrez, borosilicate glass (Additional with distribution plate) Stainless steel, polyethylene Console inpLlts Detector, B-686 Peak Detector, Eluant level detector(s), Pressure sensor Consolec outputs 3 switched power, 3 continuous power; changeover valve, X-Y drive, event marker, recorder Dimensions l x w x h 480 x 420 x 550 mm Weight (without racks) 15.4 kg Weight of 4 racks 6.3 to 9.5 kg (depending on rack size) Electrical requirements 240V 25W
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