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:
“Two forms move among the dead, high sleep
Who by his highness quiets them, high peace
Upon whose shoulders even the heavens rest,
Two brothers. And a third form, she that says
Good-by in the darkness, speaking quietly there,
To those that cannot say good-by themselves.”
—Wallace Stevens (1879–1955)
“Our character is not so much the product of race and heredity as of those circumstances by which nature forms our habits, by which we are nurtured and live.”
—Marcus Tullius Cicero (106–43 B.C.)
“Three forms I see on stretchers lying, brought out there untended
lying,
Over each the blanket spread, ample brownish woolen blanket,
Gray and heavy blanket, folding, covering all.”
—Walt Whitman (1819–1892)