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  Fraction Collectors
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    Continuous Small Volume Fraction Collector


Continuous Small-Volume

MultiChannel Collector

Gradient Fractionator


A Revolutionary Method for Collecting and Fixing Small Volumes

The Continuous Fraction Collector from Brandel introduces an entirely new method of working with extremely small sample volumes for later analysis. In addition to being faster, more precise, and more versatile than conventional methods, it also reduces the cost of consumables and their disposal.

The premise is simple. A flat sheet of filter paper, membrane or other substrate is wrapped around a rotating cylinder. Fluid from your source is fed through a cannular traveling from left to right, and is absorbed into the substrate. When removed from the drum, the substrate will contain a series of slightly angled, parallel samples.

Flow rate, cylinder rotation and cannular cross-feed are user adjustable, so that the amount and spacing of samples meet your analytical requirements. Start, stop and interrupt commands can be sent from a host to the Fraction Collector by way of a communications port, so that precise amounts of sample can be fixed as a continuous line or as discrete events. A programmable event marker provides visual locators for samples on the sheet.

Samples can be fixed to substrate as discrete events (upper), or as a continuous stream (lower). Small dots represent event markers that provide visual cues as to sample location. All spacing parameters are user definable.



Continuous Small Volume Fraction Collector

 A variety of glass fibre and membrane substrates are available.  Please call for pricing and information.


Collects small-volumes of fluid from a continuous stream and fixes onto a variety of substrates.

Connects to a variety of sources, such as columns, HPLC, fractionator or other.

Can be used with various imaging detectors, scintillation counters, fluorescent detectors, etc. Cutting substrate permits analyses such as electrophoresis, PCR, etc.

Variable cylinder rotation and cross-feed permit calculation of concentration in a known volume, or counts in a known concentration.

Communications port allows a host to start and stop movement of substrate cylinder, event marker, and cannular carriage. Samples can be fixed in a continuous line or "spotted" as discrete events.