Whatman 1450-917 Filter Sheets, 460 x 570mm, Hardened Low Ash Grade 50, 100/pk (PN:1450-917)

Whatman Grade 50 filter sheets are designed for quantitative analysis and fine particle retention, making them ideal for applications such as gravimetric analysis, sample preparation, and filtration of very fine precipitates in laboratory settings.

Grade 50 is known for its slow filtration rate and high retention of very fine particles (around 2.7 µm), along with a thin, hardened, and highly glazed surface. This combination allows precise filtration while minimizing fiber shedding and improving sample purity.

Yes, these hardened low ash filter sheets are specifically suitable for vacuum-assisted filtration, such as use with Büchner or Hirsch funnels. Their high wet strength allows them to withstand pressure and handling during filtration processes.

Low ash content (typically ≤0.015%) ensures that minimal residue remains after combustion, which is critical for accurate analytical results in gravimetric testing and trace element analysis.

The large sheet size allows users to cut custom shapes or sizes, making it highly versatile for different filtration setups, including large-scale or industrial laboratory applications where standard circular filters may not fit.