Whatman Grade 542 Quantitative Hardened Ashless Filter Papers

Whatman Grade 542 Quantitative Hardened Ashless Filter Papers are acid hardened to allow high retention of fine particles in chemically harsh conditions. When acting as a gravimetric filter, this cellulose filter paper is therefore well suited for use in capturing fine precipitates in applications such as metal determinations and hydroxide collection.

• High wet-strength
• Acid-hardened for resistance to strong acid and alkali solutions
• Nominal particle retention rating of 2.7 µm
• Herzberg filtration speed of 2510 s
• Extremely low ash content (0.006% ash maximum)