Grade 42

Whatman Grade 42 ashless quantitative filter papers are designed for critical analytical filtration procedures. Offering the finest retention among all Whatman ashless filter paper grades. These papers are particularly suited for gravimetric analysis and sample preparation.

Key Features:

Ashless: Contains a maximum of 0.007% ash, ensuring minimal contamination in sensitive analytical work.
Fine Particle Retention: With a nominal particle retention rating of 2.5 µm, Grade 42 filters are capable of capturing extremely small particles. This makes them ideal for applications requiring high precision.
Filtration Speed: These filters have a Herzberg filtration speed of 1870 seconds, reflecting their fine retention and the careful filtration process necessary for thorough analysis.
Applications: Grade 42 filters are commonly used in the cement industry as calcium carbonate filters. They are critical in the analysis of lime and cement. They are also suitable for a wide range of other gravimetric analyses, particularly where the retention of fine particles is essential.

Whatman Grade 42 filter papers are essential for any analytical procedure requiring the retention of very small particles. Their extremely low ash content and fine particle retention make them reliable for use in industries like cement production, where precise analysis is vital.