UniPrep devices consist of two parts: a test tube and a filter-plunger. 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 filter-plunger. UniPrep devices function in a similar way to the Mini-UniPrep. However, UniPrep does not contain a septum in the cap and can be used to filter larger volumes (1 to 5 ml). Features and benefits ● Integral storage vial saves time and minimizes laboratory waste ● Built-in glass fiber prefilter means even difficult samples are quick and easy to prepare ● Choice of membranes for wide sample compatibility applications ● Sample preparation (e.g., prior to preparative HPLC) ● Difficult-to-filter samples ● Quick filtration of samples The UniPrep syringeless filter is selected based on compatibility with the sample in use. In manual operation, the filter-plunger, 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. UniPrep membranes are available for various applications: ● Glass microfiber (GMF): Layered glass microfiber depth filter for use with samples containing aqueous or organic solvents (indicated pore size is the particle retention rating) ● Nylon (NYL): Naturally hydrophilic membrane for filtration of samples containing aqueous or organic solvents with a pH range of between 3 to 10 ● Polytetrafluorethylene (PTFE): Chemically inert Teflon membrane for filtration of samples containing > 50% organic solvent ● Polyvinylidene fluoride (PVDF): Low protein binding membrane for filtration of samples with aqueous or aqueous/organic solvent composition |
Technical Data - UniPrep Syringeless Filters |
Housing | Polypropylene |
Filtration area | 0.3 cm² |
Capacity | 1-5 ml |
Volume ‘Hold Up’ | 50 μl |
Prefilter | Glass fiber |
Sterilization | Autoclave: 121°C at 15 psi (1 bar) for 20 minutes |
Ordering Information - UniPrep Syringeless Filters |
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