Merck, WHA2827047, Whatman®glass microfiber filters, Grade 934-AH®</SUP>

General description
Whatman Grade 934-AH borosilicate glass microfiber filters feature a smooth surface with high retention efficiency and high flow rates for large-volume liquid filtration. Ready-to-use (RTU) formats available for Total Suspended Solid (TSS), Total Dissolved Solids (TDS) and Total Suspended Volatiles (VSS). Whatman Grade 934-AH filters are well suited for large-volume filtration. Applications include cell harvesting, liquid scintillation counting, air pollution monitoring, and water pollution monitoring. Whatman Grade 934-AH binder-free glass microfiber filters are available in a wide range of sizes in circles and sheets.
Application
Water pollution monitoring
Air pollution monitoring
Cell harvesting
Liquid scintillation counting

Features and Benefits
Our 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.

Legal Information
934-AH is a registered trademark of Cytiva
Whatman is a registered trademark of Cytiva