Forms
In scientific applications, the most common sizes available are 0.2 or 0.22 µm and 0.45 µm pores. These sizes are sufficient for HPLC use. The smallest known sterile syringe microfilter have pore sizes of 0.02 µm. Membrane diameters of 10 mm, 13 mm, 25 mm are common as well. Some syringe filters for small volumes may be not resemble a wheel at all.
The syringe filter body may be made of such materials as polypropylene and nylon. The filter membrane may be of PTFE, nylon, or other treated products for specific purposes. Most manufacturers publish compatibility wallcharts advising users of compatibility between their products and organic solvents or corrosive liquids (e.g. trifluoroacetic acid).
Read more about this topic: Syringe Filter
Famous quotes containing the word forms:
“Let us say it now: to be blind and to be loved, is indeed, upon this earth where nothing is complete, one of the most strangely exquisite forms of happiness.”
—Victor Hugo (1802–1885)
“A painter told me that nobody could draw a tree without in some sort becoming a tree; or draw a child by studying the outlines of its forms merely,—but by watching for a time his motions and plays, the painter enters into his nature and can then draw him at will in every attitude.”
—Ralph Waldo Emerson (1803–1882)
“The terrorist and the policeman both come from the same basket. Revolution, legality—counter-moves in the same game; forms of idleness at bottom identical.”
—Joseph Conrad (1857–1924)