Water filter cartridges

The produced cationic and anionic exchange fibroid sorbents on the base of polyacrylonitrilic fiber were used to produce household water filters. The cloths of cationic and anionic exchange sorbents with mass of 50 g each one were reeled on a perforated cylinder with diameter of 10 mm and length of 15 mm. This cartridge could be easily replaced. Initial tap water... 

Water is often deionized using an ion exchange (Section 11.6) cartridge to remove hardness minerals. Such deionization of water is often done in conjunction with distillation, such that the water is both deionized and distilled prior to use. Also, if the water is contaminated with organics, or other low boiling substances, a charcoal filter cartridge is often used as well. 

Some pumps have easily exchangeable filter cartridges that not only hold back oil mist, but clean the circulating pump oil. Whenever the amount of water vapor present is greater than the water vapor tolerance of the pump, a condenser should always be installed between the vessel and the pump. (For further details, see Section 2.1.5)... 

Nakazato et al. (284) determined the CF and geniposidic acid content in leaves of Eucom-mia ulmoides used in health foods and beverages. The samples (dried leaves or granules) were refluxed with water, filtered, acidified, and cleaned up on aMegaBondElut Cl8 cartridge linked to an Elut SAX cartridge. The eluate (with MeOH-Tris hydrochloride buffer) was applied to a Inertsil ODS-2 column at 40°C and eluted with an ACN-phosphate solution mixture. Detection was performed at 240 nm, reaching a DL of 10 fig/g. 

The difference lies in the fact that the hydrophobic filter cartridge in the filter housing is flooded with sterile water at the inlet side. After applying the test pressure, the decrease in pressure is measured. This pressure decrease is caused by the penetration of the water in the membrane matrix. 

Aerobic fermentation processes also require a continuous supply of large quantities of air, typically on the order of one volume of air per volume of liquid per minute, VVM. Sterilization of this air is mandatory in almost all fermentations. Absolute filter cartridges of polymeric membranes are now used almost exclusively in the fermentation industry. Relatively small units have replaced the large depth filters used in the past. Still, water and particulates pose a major problem for filters thus requiring the use of prefilters and traps to remove these contaminants before they reach the absolute filter. Parallel installation of the filters prevents a total shutdown of the fermentation process in the event of filter clogging. 

The extracts are quantified. This may be quoted directly as the weight of nonvolatile materials per filter cartridge or per unit weight or per unit of surface area, according to which is most appropriate. Alternatively, extraciables may be quoted in relation to a pharmacopoeia oxidizable substances test. The primary purpose of this test is to monitor water quality, the inference being that the amount of materials extractable from the filter is no worse than the pharmacopoeia standards for water. 

First method 1 g of sample was extracted with water/methanol (1/1 v/v) (3 X 20 mL) by mechanical stirring the extract was evaporated, diluted with 10 mL water, filtered (0.2 pm filter), passed on a Cis Sep-Pack cartridge and stored in a glass flask at 4 °C in the dark. Separation was by anion exchange LC (Hamilton PRP X 100) in isocratic mode (phosphate). Hydride generation was carried out (using 1% NaBH4 in NaOH/HCl) followed by QFAAS detection. 

The pre-treated water flows to the cartridge filter (nominal pore size of 5.0 tm) at 70 m /h. The pressure drop (AP) across the filter is monitored by a local AP indicator/ switch. When AP exceeds 1 bar or every 3 months, the plumed cartridges are replaced. The pleated depth filter cartridges are sized based on flow rate and pressure drop, e.g. the rating is 301/m per 25 cm long cartridge with a pore size of 5.0 pm. 

A novel water pmification filter has been in development over the past seven years. The first version is a pleated depth filter cartridge that has high particle retention efficiency at moderate to high flowrates, while also having a high particle retention capacity. The filter media is also sold as non-woven media by Ahlstrom imder the tradename Disrupter . Argonide manufactures the filter cartridge from Disraptor media. 

Filter cartridges Water or ethanol extracts Direct injection or after evaporative concentration Nucleosil 100-5, RP18, 250 cm MEOH/water (90 10), ACN/water (60 40) 220 20 xl, 1 ml/min Phthalates, fatty acids, phenols, siloxanes, acrylates, aUphatics, amides [8]f... 

Plumbing components fittings, pump impellers, shutoff and mixing valves, valve stems, tees, elbows, couplings, water filter housings, irrigation system parts faucet cartridges, toilet flush valves, ball cocks, showerheads... 

Volume reduction of concentrated evaporator bottoms, which may include boric acid wastes, laundry wastes, chemical wastes, and other floor drain wastes, is accomplished in the radwaste volume reduction system. The major components of the system are the crystallizer chamber and recirculation system, condenser, and vacuum pump system. The crystallizer chamber consists of a conical tank and an inner circular baffle to separate solid crystals from a clear recycle stream. Combustible wastes such as clothing, filter cartridges, and wood are volume-reduced in the radwaste incinerator. Solidification of volume-reduced wastes and other low-level radioactive wastes, such as spent resins and contaminated tools, is performed in the cement solidification system. The major components of the cement solidification system include the high shear radwaste mixer, waste dispensing system, flush water recycle steam, cement storage and feed system, and the container handling system. 

Solid-phase extraction (SPE) of filtered water. SPE cartridges were eluted with [150,151]... 

Because the air purifying filter removes nearly all the water and dirt, it is not essential to use any other filters. If a filter separator is installed just ahead of the air purifying filter, it will act as a ptefilter, and the life of the air purifying filter cartridges will be extended. several times. The technique has the added advantage that water is drained automatically fi om the system by a float-operated valve. 

Sample preparation Condition a 3 mL 200 mg Bond Elut CIS SPE cartridge with two 3 mL portions of MeOH and two 3 mL portions of 5% acetic acid. Mix 500 p,L serum with 500 p.L 10% acetic acid, add to the SPE cartridge, wash with 3 mL water, elute with four 500 p,L portions of MeOHrwater 60 40. Evaporate the combined eluates to dr3mess under a stream of nitrogen, reconstitute the residue with 250 iL water, filter (0.22 p,m). Inject a 100 p,L aliquot onto column A and elute to waste with mobile phase A. After an unspecified time, backfiush the contents of column A onto column B using mobile phase B. Monitor the effluent from column B. (Sato,K. Kobayashi,K. Moore, C.M. Mizuno,Y. Katsumata,Y. Semi-quantitative analysis of cefaclor in human serum by capillary high performance liquid chromatography/fast atom bombardment mass spectrometry. Forensic Sci.Int. 1993, 59, 71-77.)... 

Sample preparation Mix 50 g ground feed with 1 mL 50 (xg/mL IS in DME and 200 mL acidified MeOH, stir overnight. Remove 20 mL of the supernatant and dilute with 20 mL water, add to a Mega Bond C18 SPE cartridge, wash with 25 mL acidified MeOH water 65 35, elute with 25 mL acidified MeOH water 80 20. Evaporate the eluate to dryness at 60°, reconstitute the residue with 1 mL DMF and 1.5 mL water, filter (0.45 ixm), inject a 20 p.L aliquot. (Acidified MeOH was 5 mL cone. HCl in 1 L MeOH.)... 

---