unheard of high rate separation of large and small molecules!
Today, laboratories can attain molecular filtration of up to 250 ml. per hour of water . . . more than 100 times the rate possible with any previous type of laboratory equipment ! These unheard of rates of nitration are accomplished by using a Molecular Filter, invented by Dr. Clarence Hiskey of the In ternational Biochemical Co. It utilizes ordi nary pressure filtration methods to sepa rate large and small molecules directly from solution. Now any laboratory tech nician with ordinary pressure filtration training can achieve high rate separation of large and small molecules. In addition to being faster and simpler to operate, the new Molecular Filter has easily replaceable filter cartridges, utilizes hand connections that require no special tools, and permits continuous or inter mittent operation. It has high throughput and low holdup. It is unitized for imme diate use. Detailed description The apparatus consists of a stainless steel reservoir and filter unit mounted on a stand. Solution to be filtered is introduced to the reservoir having a capacity of 1750 ml. A pressure of 100 lbs. per square inch is communicated to the reservoir through saran tubing and fittings that are tightened by hand. A toggle valve controls the flow of solution from the reservoir to the inlet end of the filter cartridge contained in a pyrex cell. Special convenient fittings are used to connect the cartridge to the reservoir and cell. Filtrate passes through the walls of the cartridge and collects in the cell where it can be removed from the outlet a t its bottom. Residue is removed from the outlet end of the cartridge where another toggle valve is supplied for control. The replaceable cartridge filter (a 125 and a 250 ml./hour unit are supplied) contains a cellulosic tube approximately Vi" in diameter with a wall thickness of 1% thousandths of an inch. This ex tremely thin membrane, with pores of approxi mately 5 millimicrons, is supported by a white cot ton braid along its full length. The braided element is coiled and folded to fit in a nylon bag to act as a support and limit the amount of holdup.
molecular filter PRICE LIST G8275 Molecular Filter, international Biochemical, com plete with tank, valves, fittings, glass cell, and set of two cartridges but without stand and clamps ea. 278.45 G8275 A
for complete information write for molecular filter bulletin
Complete set of clamps and stand for G8275 ea. 16.55 G8275 M Filter cartridge, only, 125 ml./hr. size for replace ment in G8275 ea. 4.50 lots of 6 ea. 4.00 68275 Ν Filter cartridge, only, 250 ml./hr. size for replace ment in G8275 ea. 6.75 lots of 6 ea. 6.00
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The EMIL GREINER Co.
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