Whatman 1540324 Quantitative Hardened Low Ash Filter Circles, Grade 540, 24 mm, Maximum Volume 454 ml/m (Pack of 100)

• The general purpose hardened ashless filter paper with medium retention and flow rate
• Extremely pure and strong with a hard surface
• High chemical resistance to strong acid and alkali

These are the supreme quantitative filter papers featuring high wet strength and chemical resistance. These papers are acid-hardened, which reduces ash to an extremely low level. The tough surfaces pf these filters make them suitable for a wide range of critical analytical filtration operations. Each grade offers a convenient combination of filtration speed and particle retention.