Cytiva Borosilicate Glass Microfiber Filter, 47mm Diameter, Grade 934-AH RTU, pack/100

Cytiva Glass Microfiber Filter, 47mm Diameter, Grade 934-AH RTU, 100 per pack. Whatman offers two types of glass microfiber filters manufactured from 100% borosilicate glass: binder free that is chemically inert and with binder. These filters combine fast flow rates with high loading capacity and the retention of very fine particles, extending into the sub-micron range. Can be used at temperatures up to 500°C and are ideal for use in applications involving air filtration and for gravimetric analysis of volatile materials where ignition is involved. They have a fine capillary structure and can absorb significantly larger quantities of water than an equivalent cellulose filter, making them suitable for sport tests and liquid scintillation counting methods. Can also be made completely transparent for subsequent microscopic examination.

Whatman glass microfiber filter papers in grade 934-AH RTU have been pre-washed, dried (or ignited), cooled, desiccated and weighed, which eliminates 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 have fine particle retention of 1.5 µm at high flow rates to process heavy, turbid samples.

Whatman filter papers 934-AH family of products come in three different varieties:

• 934-AH RTU 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. (Most filters come weighed to four decimal places, however a version of the 47 mm glass microfiber filter can be measured to five decimal places if needed.)
• Ready-to-use for Volatiles—pre-washed, pre-weighed and pre-fired at 550°C aligned to US EPA Laboratory Standard Method 2540 parts C, D, and E.
• RTU Double Weigh—drying, cooling and filter paper weighing steps repeated twice for customers with the highest regulatory concern.
• Economy versions of 934-AH RTU dissolved, suspended, and volatiles testing filters are also available. These filter papers are pre-washed and dried but not weighed and do not come with barcodes.

The pre-weighed glass microfiber filter papers are packaged with a barcoded aluminium pan noting the filter paper weight. The barcode from this pan can be used to find documentation of the filter weight on the Cytiva website. Each box of 934-AH RTU filter papers also has a barcode that can be used to download the weights of all filter papers from that box.

What are grade 934-AH RTU (ready-to-use) Whatman glass microfiber filter papers used for?

Whatman 934-AH ready to use (RTU) glass microfiber filter papers are widely used for dissolved, suspended and volatiles solid analysis. They are also used for a wide range of industrial and environmental water monitoring applications including the monitoring of rivers, lakes and coastal waters, as well as analyzing purified discharge of wastewater treatment plants and monitoring discharge water from industrial plants.

Specifications:

• Grade: 934-AH RTU
• Nominal air flow rate: 3.7 s/100 ml/in²
• Nominal basis weight: 64 g/m²
• Max recommended temperature: 550 °C
• Binder type: Binder
• Typical Particle Retention in Liquid 1: 1.5 μm
• Typical water flow rate 2: 341 ml/min
• Dimensions: 47 mm