Whatman Grade 934-AH RTU Glass Microfiber Filter Papers

These ready-to-use, Grade 934-AH RTU Whatman Glass Microfiber Filter Papers are the time-saving version of GEs 934-AH glass microfiber filter papers, which are widely used for dissolved, suspended and volatiles solids analysis. They have been prewashed, dried (or ignited), 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 also have fine particle retention of 1.5 µm at high flow rates to process heavy, turbid samples. In addition, the pre-weighed glass microfiber filter papers are packaged with a barcoded aluminum pan noting the filter weight. The barcode from this pan can be used to find documentation of the filter weight on the GE website. Each box of 934-AH RTU filters also has a barcode that can be used to download the weights of all filters from that box.

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

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


Image(s) are representative of the product group and not necessarily the individual product.

For Volatiles, Pre-Rinsed and Ignited
Diameter (mm): 35

RTU, For Volatiles, Pre-Weighed
Diameter (mm): 35

For Volatiles, Pre-Rinsed and Ignited
Diameter (mm): 42

RTU, For Volatiles, Pre-Weighed
Diameter (mm): 42

For Volatiles, Pre-Rinsed and Ignited
Diameter (mm): 47

RTU, For Solids, Double Weight
Diameter (mm): 47

RTU, For Volatiles, Pre-Weighed
Diameter (mm): 47

For Volatiles, Pre-Rinsed and Ignited
Diameter (mm): 70

RTU, For Solids, Double Weight
Diameter (mm): 70

RTU, For Volatiles, Pre-Weighed
Diameter (mm): 70

For Volatiles, Pre-Rinsed and Ignited
Diameter (mm): 90

RTU, For Solids, Double Weight
Diameter (mm): 90

RTU, For Volatiles, Pre-Weighed
Diameter (mm): 90