Glass-fibre filters

• Resistant to temperatures up to +500 °C
• Analysis of hot and acidic gases, including emission control and smoke stack gas monitoring
• Soxhlet extraction
• Analysis of pesticide residues
• Determination of oil/fat content of foods
• Analysis of oil and grease in solid wastes

Recommended filter for fast clarification of aqueous solutions and controlling water pollution.

• Made of 100 % borosilicate glass fibres with organic binder
• Chemical stability: It keeps all its properties in contact with acid solutions (except hydrofluoric acid) and basic

• High flow speed and high permeability to air
• Stabile up to 180°C
• Suitable as filter belt measuring instruments and automats for air filtration and analysis
• Fast clarification of aquous solutions and degassing of acidulous solutions

Grade GF/C is pre-rinsed and dried, grade GF/C RTU is additionally pre-treated with washing, drying, cooling (in a desiccator) and weighing steps, aligned to the requirements of EN 872. It is certified that these filters have weight loss of less than 0.017 mg/cm² after preparation, which is required by the standard. Each grade GF/C RTU ready-to-use filter is placed in an individually barcoded aluminum pan that notes the filter weight. Each box contains an additional box ID and barcode that can be used to download the weights of all 100 pans in that box.

Applications: For cell harvesting, liquid scintillation counting and binding assays, especially suitable for use in applications involving air filtration and for gravimetric analysis of volatile materials where ignition is involved.

Pre-washed, dried or ignited, cooled and weighed Glass Microfibre filters, which eliminate the pre-treating steps that are otherwise required by the US EPA Laboratory Standard Method 2540 parts C, D, and E. These glass microfiber filter papers also have fine particle retention of 1.5 µm at high flow rates to process heavy, turbid samples.
Each ready-to-use filter is placed in an individually barcoded aluminum pan that notes the filter weight. Each box contains an additional box ID and barcode that can be used to download the weights of all 100 pans in that box.

Solids: For suspended and dissolved solids. Pre-washed, dried, cooled, and weighed filters with certified mass loss between washing and drying steps of the lesser of less than 0.5 mg or 4% in accordance with US EPA Lab Standard Method 2540 parts C and D.
Solids, double weigh: As Solids additionally the drying, cooling and weighing steps are repeated twice for highest regulatory concerns.
Volatiles: For volatile substances. Pre-weighed. Aligned to US EPA Laboratory Standard Method 2540 parts C, D, and E
Volatiles, ignited: As Volatiles but pre-washed and pre-fired at 550 °C instead of pre-weighed.

Applications: To be used for solid analysis as well as a wastewater filter for a wide range of water monitorings.

For emission control.

• Hydrophilic
• Air / Gas Filtration
• Non-sterile

The stacked-disk format of Millipak® filter units eliminates the risk of fiber release from downstream support material.

Features & Benefits:

• No risk of membrane cracking as the 0.22 µm membrane is supported by a rigid plastic disc with channels
• As the membranes are welded onto the support disc, the risk of contamination is considerably reduced
• Minimum dead volume thanks to the large filter surface

• Available as a round filter or sheet
• Temperature resistance up to max. 900 °C
• Each batch is checked and certified for trace elements
• Made from micro-quartz fibers of extreme purity, binder-free
• Especially good with small amounts of particles