Filters, Paper

Quantitative cellulose filter papers are primarily used in gravimetric analysis procedures and perform separations by entrapping particulate within the random matrix of cellulose fibers within the depth of the media. This media family is also widely used in methods to prepare samples for further...

Qualitative cellulose filter papers perform separation by entrapping particulate within the random matrix of cellulose fibers within the depth of the media. This media is widely used in methods requiring the determination and identification of particulate in both liquids and gas. Also, this natural...

Depth filtration glass micro fiber 934-AH® - Fine porosity, fast flow rate, with a 1.5 µm size particle retention. This material is the standard for volatile suspended solids content and related measurements (Standard Methods 2540D and EPA Method 160.2). Also widely used in cell harvesting...

Glass microfiber filters offered in this product range are produced from 100% borosilicate glass microfiber without the use of binders or strengthening agents. These filters offer many advantages in a wide range of analytical applications. The fibers used to manufacture these depth filters are...

Advantec Quantitative Ashless Filter Papers are made from the highest quality alpha cotton cellulose. One critical step in the manufacturing process of these filter papers is acid washing. All grades are double acid washed in hydrochloric then hydrofluoric acid to reduce levels of SiO2, CaO, and...

Depth filtration glass micro fiber GRADE A - Fine porosity, fast flow rate, with a 1.6µm size particle retention. Frequently used in the filtration of precipitated proteins and cells. Ideally suited for use as a filter for radioimmuno assay of weak beta emitters by scintillation counting and...

Designed for general qualitative laboratory work Fast filtering speed; 25um particle retention Low retentivity, which retains coarse or gelatinous precipitates such as aluminum hydroxide, cobalt carbonate, mercury iodide and magnesium hydroxide Creped surface; thickness approximately 0.23 mm; 24...

Designed for general qualitative laboratory work Medium filtering speed; 6 µm particle retention Medium retentivity, which retains medium crystalline precipitates such as aluminum phosphates, barium carbonate and lead chromate Thickness approximately 0.15 mm 6 µm pore size

Depth filtration glass micro fiber GRADE E - Fine porosity, fast flow rate, with a 1.3 µm size particle retention. This material is an economical media for suspended particle analysis in water, cell harvesting, pre-filtration and air monitoring applications. Binderless borosilicate glass...

Designed for very fine precipitates Slow filtering speed; 1 µm particle retention High retentivity, which retains very fine crystalline precipitates such as cuprous oxide, lead sulfate, barium sulfate and manganese carbonate Thickness approximately 0.20 mm, 1.5 µm pore size

6514F35 of borosilicate glass, with Standard Taper 35/25 socket mouth; without stopper or sample carrier. 6514F40 stopper fits the 500 and 1,000 mL flasks; glass hook tip on lower end; platinum sample carrier not included. Black paper sample wrappers (6514F70) absorb heat quickly for infrared...

A deep black, qualitative paper for filtering light colored sediments, etc. Medium speed Retains crystalline precipitates of medium fineness 6 µm pore size

Depth Filtration Glass Micro Fiber GRADE D - Coarse porosity, fast flow rate, with a 2.7 µm size particle retention. Well suited for higher volume and repetitive laboratory filtering. Also ideally used as a general pre-filter to extend primary filter life. Binderless borosilicate glass...

Depth Filtration Glass Micro Fiber GRADE C - Fine porosity, fast flow rate, with a 1.2 µm size particle retention. Primarily used for RIA procedures and harvesting lymphocytes. Binderless borosilicate glass microfiber. Particle retention: 1.20 µm Filtration speed: 25 seconds Thickness: 0.28 mm Basis...

Ahlstrom's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still...

6514F35 Ogg Flask of borosilicate glass, with Standard Taper 35/25 socket mouth; without stopper or sample carrier. 1233S49 Platinum Ogg Sample Carrier has a perforated aluminum sheet. It features a 13 mm deep basket on lower end that takes the paper-wrapped sample. 6514F40 Stopper fits the 1,000 mL...

I.W. Tremont offers a diverse product line of high quality membrane filters available in a variety of materials, diameters and pore sizes and suitable for a wide range of applications including cell retention, In Vitro Diagnostics, particle collection, clarification and sterile filtration of aqueous...

Depth filtration glass micro fiber GRADE B - Fine porosity, medium to fast flow rate, with a 1.0 µm size particle retention. Ideally suited for the collection of biochemical polymers that have been precipitated by denaturation. This material is twice as thick as Grade A with a higher loading...

Depth filtration glass micro fiber GRADE F - Fine porosity, medium flow rate, with a 0.7 µm size particle retention. Frequently used with Grade D to filter diluted aqueous solutions containing strong oxidizing, acidic, or alkaline components prior to laser spectroscopy. May also be used for TCLP...

Depth filtration glass micro fiber GRADE A-E - Fine porosity and fast flow rate, with a 1.0 µm size particle retention. Binderless borosilicate glass microfiber. DOP efficiency is 99.98%. Primarily used in suspended solids and air monitoring. Particle retention: 1.00 µm Filtration speed:...

Ahlstrom binder-free glass filter papers are ideal for use in water and wastewater analysis, gravimetric analysis involving ignition of the sample and filtration of hot gases and liquids. They are recommended for use in environmental applications, biochemical testing, as pre-filters and as direct...

Advantec Quantitative Ashless Filter Papers are made from the highest quality alpha cotton cellulose. One critical step in the manufacturing process of these filter papers is acid washing. All grades are double acid washed in hydrochloric then hydrofluoric acid to reduce levels of SiO2, CaO, and...

Advantec Quantitative Ashless Filter Papers are made from the highest quality alpha cotton cellulose. One critical step in the manufacturing process of these filter papers is acid washing. All grades are double acid washed in hydrochloric then hydrofluoric acid to reduce levels of SiO2, CaO, and...

ProWeigh® Filters are 1.5µm Binderless Glass Fiber Filters with all preparation steps done for you. All ProWeigh filters are prepared according to Standard Methods requirements. 47mm binderless glass fiber filters are weighed, washed 3 times in deionized water, dried at 105C and weighed to...