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UniPrep Syringeless Filter, 0.45 µm, PTFE filtration medium Integral storage vial saves time and minimizes laboratory waste. Builtin glass fiber prefilter means even difficult samples are quick and easy to prepare. Choice of membranes for wide sample compatibility. UniPrep Syringeless Filters are preassembled filtration devices for the filtration and storage of laboratory samples. These devices are quick and easy to use and feature a plunger, filter, and vial in one unit. They replace syringecoupled filtration devices with single, disposable units. UniPrep devices consist of two parts: a test tube and a filterplunger. The design incorporates a prefilter and a membrane into the tip of the plunger. When the filter plunger is pressed through the liquid placed in the test tube, positive pressure forces the filtrate up into the reservoir of the filterplunger. UniPrep devices function in a similar way to the MiniUniPrep. However, UniPrep does not contain a septum in the cap and can be used to filter larger volumes (1 to 5 ml). The UniPrep Syringeless Filter is selected based on compatibility with the sample in use. In manual operation, the filterplunger, after the tip comes in contact with the liquid, is slowly pushed into the test tube until it stops at the bottom. The UniPrep is emptied either by decanting into a sample or autosampler vial or by drawing the filtered sample into a syringe for manual injection into an instrument.

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