Qualitative Filter Papers-Grade 5: 2.5μm

Whatman gridded filters have clearly defined grid lines spaced at 3.1 or 5 mm intervals.

The special ink used is nontoxic and completely
free from bacterial growth inhibitors.

Whatman black mixed cellulose esters are available plain for automatic colony
counting applications, as well as gridded to assist in manual counting procedures.

Black membranes provide contrast between residue or cell colors and the filter
without having to counter-stain the membrane.

Puradisc syringe filters combine premium quality and economy.

They are used for the quick, efficient filtration of samples up to 100 mL volume.

Puradisc filters are produced from pigment-free polypropylene or polycarbonate with standard inlet (female luer lock) and outlet (male luer) connections (unless otherwise stated).

Options include a sterile, medical-grade blister pack for critical applications and a special tube tip outlet that allows the sample to be accurately

Dispensed into a micro-vial, removing air lock.