Laboratory Filters

A Broad line of Filtration Products

Waters carries a broad line of Pall Life Sciences laboratory filters for sample and solvent filtration including:

HPLC sample filters in syringe filter format
Solvent filters in membrane disc format
Solvent filtration apparatus

The line includes a wide selection of membrane types and pore sizes to deliver the right lab filter for any sample type. A broad range of device sizes ensures complete sample filtration with minimal sample loss. The filter selector makes it easy to select the right lab filter for any application. See the lab filter selector demo on the right side of this page.

Not sure which filter to use? Use our Filter Selector to help you choose the best filter for your analysis.

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Filter Design

Pall Life Sciences broad range of device sizes assures complete sample filtration with minimal sample loss. In addition, many Acrodisc^® syringe filters offer the option of a minispike outlet, rather than the traditional male luer outlet. The minispike outlet, available on 13 mm PTFE, Nylon, GH Polypro and PVDF Acrodisc^® syringe filters, allows for easy dispensing into autosampler vials.

Membrane Design

Membrane Type (PTFE, GHP, PVDF, Nylon) — Typically, the first step in selecting a suitable filter is to choose a membrane that is chemically compatible with the sample (see chart opposite). For aqueous samples, it is preferable to use a hydrophilic membrane (GHP, PVDF or Nylon) versus a hydrophobic membrane (PTFE). With proteinaceous samples, a low protein binding filter (GHP or PVDF) is preferable to other hydrophilic filters (Nylon).

GHP Acrodiscs

HPLC certified
Hydrophilic polypropylene membrane offers excellent chemical compatibility and minimizes extractables
Suitable for aqueous and organic solvents
Low protein binding

Nylon Acrodiscs

HPLC certified
Save time, no pre-wetting
Hydrophilic nylon membrane offers broad chemical compatibility

Acrodisc^® LC (PVDF)

HPLC certified
Hydrophilic PVDF membrane
Filters both aqueous and organic solvent solutions

Acrodisc^® CR (PTFE)

HPLC certified
Excellent chemical compatibility
Used for aggressive and organic solvents

Ion Chromatography (IC) Acrodiscs

IC certified to ensure low ionic backgrounds
Recommended for aqueous samples only

GHP Acrodisc^® GF and Nylon Acrodisc^® GF

Designed with a glass fiber prefilter over membrane
Maximum throughputs for hard-to-filter samples
HPLC certified
Binder-free borosilicate glass fiber prefilter

Glass Fiber Acrodiscs

100% binder-free borosilicate glass fiber filter
Can be used alone or in series with another Acrodisc^®
deal for prefiltration of 5-100 milliliters of serumSupor^® (PES)
Hydrophilic polyethersulfone
For biological, pharmaceutical or sterilizing sample
Can be gamma sterilized or autoclaved

Pore Size (0.2 and 0.45 µm) — The filter pore size is usually a personal preference of the chromatographer, but relates to the column packing material. Since there are many different packing materials, a general guideline is that most customers find that the 0.45 µm filter meets their requirements, although chromatographers are increasingly moving toward using 0.2 µm filters.

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