Circle Filter Paper, quantitative, 90 mm, Grade 589/3, blue, slow, 84 g/sqm, 100 pcs.

Ash-free filter papers (on average 0.004% ash) recommended for quantitative analyses, gravimetric routine tests and sample preparation for instrumental analysis.

• Made from highly refined cotton linters and pulp
• a-cellulose content above 95%, therefore high stability and resistance
• Acid washed and therefore free of minerals and metal ions, ideal for the determination of trace elements.
• For analytical applications, quantitative and/or gravimetric routine procedures
• These papers are ideal for: Food control, beverage analysis, environmental monitoring.

These types are available as round filters with the following sizes in millimeters: 12.5 - 40.5 - 47 - 55 - 70 - 90 - 110 - 125 - 150 - 185 - 240.

This product is equivalent to: Schleicher-Schüll 589/3 blue -- Whatman 42 -- Macherey Nagel 640de -- Sartorius 391