Glass Microfiber Filters for Laboratory Filtration

 Glass-Microfiber-Filters-for-Lab-Filtration-cbt.jpg

As a leading supplier of laboratory consumables for many years, Cobetter is committed to providing products with competitive price, accurate test results and short delivery time for our customers.  

Cobetter uses the best natural materials to ensure consistent high quality, reproducibility and uniformity in every filter paper. Each filter paper is rigorously tested before packaging in terms of weight, thickness, air flow rate and mechanical strength.

Glass fibre filter paper is widely used in laboratory filtration and separation due to their high filtration accuracy, high flow rates, ultra low pressure drop, high load capacity, low extractables and good chemical compatibility.


Applications

Basic Analysis

Food & Beverage

Pharmaceutical Research

Air Monitoring



Glass Microfiber Filters Binder Free

The membranes are made from 100% borosilicate glass fiber, the large surface area and deep structure provide excellent impurity retention efficiency and low filtration resistance. Glass fibre filter membranes can adsorb particles down to 0.7um in liquids and <1um in air and gases. It is also resistant to temperature of 500°C.


Features and Benefits

- High retention rate of fine particulate matters

- Good erosion resistance

- High flow rate

- Binder free


Specifications

Grade

Nominal Rating
(µm)

Air speed
(s/100min)

Thickness
(µm)

Weight
(g/m²)

Water Flow Rate
(ml/min)

Applications

GF/A

1.6

4.3

260

53

143

Water and air pollution monitoring and wastewater filtration

Food analysis

Filtration of algae and bacterial cultures

Protein filtration

Weak beta emitter radioimmunoassay

Determination of airborne particles by weight

GF/B

1

12

675

143

81

Liquid clarification 

Liquid scintillation

GF/C

1.2

6.7

260

53

105

Cell collection

Liquid scintillation

Binding assays

GF/D

2.7

2.4

675

121

681

Thick filter media for increased loading capacity

Membrane prefilter

GF/F

0.7

19

420

75

41

DNA purification and binding

Protein purification filtration

Filtration of difficult to clarify biochemical solutions and liquids

Waste leachate toxicity testing

GF/H

1.5

3.7

435

75

341

Cell collection

Liquid scintillation

Water and air pollution monitoring and wastewater filtration

EPM 2000 

-

5.6

450

85

-

High-volume PM-10 sampling equipment

• 98% particle retention rate



Glass Microfiber Filters with Binder

The glass fiber membrane is made of 100% borosilicate glass fibre. The binder is added to enhance the mechanical strength of the glass fibre membrane and is mainly used to filter coarse particles (e.g. macromolecules, dust).

In order to avoid chemical reactions with the filtered material, glass fibre membranes with inorganic binders are used for the filtration of organic substances and glass fibre membranes with organic binders are used for the filtration of inorganic substances.



Features and Benefits

- High wet mechanical strength

- High erosion resistant

High flow rate, high retention

With binder


Specifications

Grade

Air speed
(s/100min)

Thickness
(µm)

Weight
(g/m²)

Applications

GF6

-

350

80

Use as a beer filter in applications including protein removal

Determination of chlorophyll and phytoplankton residue

Determination of filterable substances and residue on ignition

Analysis of aggressive media (e.g., acidic gases)

Determination of iron content in the presence of iron oxides

Liquid scintillation measurement

GF8

12

350

80

Air pollution filters for PCB*, DDE, DDT, furans, and dioxin retention
for analysis

Pollution measurements in industrial, urban, and populated areas

Workplace dust measurements

Measurement of dust fraction in technical gases

Dust-collecting effectiveness testing

GF9

27

350

70

Determination of PCB*, DDE, DDT, furans, and dioxins in air

Pollution measurements in industrial, urban, and populated areas

Dust measurements in the workplace

Determination of dust fraction in technical gases

Testing the effectiveness of dust-collecting

GF10

12

350

70

Roll filter membranes in automatic air filtration units

GF-F34

27

355

75

Measurement of crop protection agent using gas chromatography
(GC) or HPLC

Separation and determination of cold sludge when brewing beer

Soot separation prior to use of gas analyzers

Roll filters for automatic air filtration units

GF-F63

-

280

50

Suitable for PM1, PM2.5, PM10 and TSP sampling and beta-ray attenuation

GF-F91

-

1350

220

Meets the requirements of ISO standard 3308:2000




Glass Microfiber with Surface Coating Treatment 


TCLP Testing Filters (Acid-treated with low metal content)

For a long time we have been using landfills to dispose of solid waste, but the solid waste leachate from landfills is continuously polluting the groundwater and soil. With the accumulation of time, usually 3-5 years the waste leachate will pollute 1-2km of soil and groundwater in the landfill area, this process persists for 10-20 years, the pollution area will gradually expand.

We need to constantly monitor the spread of contaminants in the area around the solid waste landfill, continually assess the potential risks, recover and dispose of waste leachate in a sound manner. The TCLP approach is commonly used in the assessment of landfill solid waste contamination risks.

To dispose of hazardous waste in a United States municipal landfill, TCLP limits must fall within standard levels set for maximum contamination levels (MCLs). 

Cobetter TCLP glass fiber membranes is made from 0.7 micron density, binder free glass fiber paper, which is acid-treated with low metal content to support TCLP testing by providing accurate information about TCLP limits to ensure the best disposal plan .

 


Specifications

Nominal Thickness

420 μm

Nominal basis weight

80 g/m²

Typical Particle Retention in Liquid

0.7 μm

Format

Customized 



Gas-Absorption Filters (Copper acetate treatment)

In the detection process of gas sensor, the composition of the detected gas is often complex, and it is easy to create cross interference between different gases. For example, for gas sensor that is indicated to detect carbon monoxide, hydrogen could be also on the gas sensor if hydrogen’s concentration is high in the test environment. Then hydrogen may also react and get a signal that the concentration of carbon monoxide is higher than the actual volume.

In order to reduce the interference of some non-specific gases in air detection process, Cobetter glass fiber membrane with copper acetate treatment can absorb some interfering gases in the air, such as H2S, HMDS, etc.


Features and Benefits

Rapid diffusion speed.

High adsorption capacity.

Efficient adsorption for interfering gases.

Low chemical background, no adsorption on detected gas.

Provide customization with a variety of specifications and treatment options. 



Glass Microfiber bonded with PTFE

Pure borosilicate glass microfibers reinforced with woven glass cloth and bonded with PTFE. Both glass and PTFE display excellent chemical and thermal resistance properties and their combination permits the application in many of the most demanding filtration environments.


Features and Benefits

High dimensional stability and high porosity

- High temperature resistance

- Great creep and wear resistance 

- Broad chemical compatibility

- Good electrical insulation properties

- Low air resistance

- Low moisture



Applications

- Aerosol sampling tests

- Diesel exhaust monitoring

- Stack emission sampling tests

- Ambient air monitoring for particulate concentration

- Waste incinerator with high temperature, high viscosity dust flue gas purification

- Flue gas purification of the iron and steel smelting blast furnace gas

- Carbon black, coking furnace flue gas purification

- Chemical industry, metallurgy, cement and other industries

- Flue gas dry desulfurization of power plant coal fired boiler



Glass Fiber Filter for Liquid Analysis

Glass-Microfiber-Filters-for-Liquid-Filtration-01.jpg

Glass Microfiber Filters for Air Filtration

Glass-Microfiber-Filters-for-Air-Filtration-02.jpg




For technical data sheet or application inquiry, you are more than welcome to contact our sales representative by sales@cobetterfilter.com or leave a message