Whatman GD/X Syringe Filters PTFE 0.45µm 25mm Pack of 1500

£2,602.00 excl. VAT
£3,122.40
incl. VAT

SKU - 1154186

6875-2504

SKU -

1154186

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Whatman GD/X Syringe Filters PTFE 0.45µm 25mm Pack of 1500

Whatman GD/X range is specifically designed for high particulate loaded samples. Constructed of a pigment-free polypropylene housing with a prefiltration stack of Whatman GMF 150 (graded density) and GF/F glass microfiber media, these filters eliminate sample contamination and allow you to filter even the most difficult samples with less hand pressure. GD/X syringe filters can process three to seven times more sample volume than standard syringe filters.

GMF 150 and GF/F are produced from 100% borosilicate glass microfiber. The innovative, graded density GMF 150 medium has a coarse top layer meshed with a fine bottom layer that retains particles to 1.0µm. A GF/F filter then retains particles down to 0.7µm. The prefilter stack ends with a final membrane.

Whatman GD/X filter construction facilitates exceptional loading capacity with fast flow rates. This prevents the build up of back pressure typically caused by the blocking of an unprotected membrane.

13 or 25mm diameter syringe filters
25mm devices for samples greater than 10 ml (however, the volume of sample that can be filtered through each filter depends on the characteristics of the sample)
Sterile options
Pigment-free polypropylene housing
Unique prefiltration stack of Whatman GMF 150 (graded density) and GF/F glass microfiber media

Benefits

Eliminates sample contamination
Requires less hand pressure, even with the most difficult samples
Processes three to seven times more sample volume

Applications

GD/X syringe filters are ideal for heavily particulate-laden samples found in;

Dissolution testing
Content uniformity
Concentration analysis
Routine sample preparation
Food analysis
Environmental samples
Composite assays

Typical Data - GD/X Syringe Filters
Parameter	GD/X 13mm	GD/X 25mm
Housing	Polypropylene (pigment free)	Polypropylene (pigment free)
Filtration area	1.3 cm²	4.6 cm²
Maximum pressure	6.9 bar (100 psi)	5.2 bar (75 psi)
Volume 'Hold Up' - Full housing - with air purge	0.5 ml 50µl (approx)	1.4 ml 250µl (approx)
Dimensions	21.6 x 29.8mm	20.8 x 29.8mm
Weight	3 g (approx)	3 g (approx)
Flow direction	Flow should enter from the inlet	Flow should enter from the inlet
Inlet connection	Female luer lock	Female luer lock
Outlet connection	Male luer	Male luer
Sterlization	Autoclave at 121ºC (131ºC max) at 1 bar (15 psi) for 20 minutes	Autoclave at 121ºC (131ºC max) at 1 bar (15 psi) for 20 minutes
Glass microfiber prefiltration media	100% Borosilicate Glass Fiber GMF 150 10µm: 1µm GF/F 0.7µm	100% Borosilicate Glass Fiber GMF 150 10µm: 1µm GF/F 0.7µm

Guide to…Syringe Filter Properties

Identifying the filter material most suitable for your application based upon the nature of the liquid or gas you are filtering will ensure the best performance of your filter. Each syringe filter contains a membrane filter of a set diameter and plastic housing with luer connections used for connecting to syringes (or in-line hosing systems).

The membrane filter material has differing chemical and physical properties such as hydrophobicity, flow rate, extractables and protein retention making them suited to differing applications. Once you have selected the most compatible filter material, you will need to consider what pore size is most appropriate for your application and what diameter filter is suitable for your sample volume.

Membrane Material

Membrane Material	Protein binding	Hydrophilic/Hydrophobic	Chemical resistance	Applications
Hydrophilic PTFE	Low	Hydrophilic	High	Purification of HPLC organic and solvent/aqueous solutions
Hydrophobic PTFE	Low	Hydrophobic	High	Filtration of solvents
PES	Low	Hydrophilic	Low/Medium	Purification of tissue culture solutions, buffers
PVDF	Low	Hydrophilic	Medium	Filtration of protein solutions
NYL	Medium	Hydrophilic	Medium	Filtration of aqueous and solvent/aqueous mixtures
CA	Low	Hydrophilic	Low	Filtration of protein solutions
CN	High	Hydrophilic	Low	Filtration of aqueous solutions where protein binding is not a concern and microbioloigical applications.
RC	Low	Hydrophilic	Medium	Filtration of aqueous and organic solvents and protein recovery applications.

Filter diameter

High particulate loaded samples with tend to block the pores in the membrane more quickly so the total volume you can filter through a certain diameter syringe filter will vary greatly. Please take the below figures as a guide only.

13mm diameter - for samples <10ml
25mm diameter - for samples <100ml
33mm diameter - for samples <250ml

For samples that are very particle ladden, it is recommened that you try pre-filtering your sample. Pre-filtering can be achieved with a number of different filters, such as glass microfibre. Some syringe filters come with an in-built pre-filter.