Whatman Quantitative Filter Paper: Grade 540 Circles Whatman 1540-125

Whatman Quantitative Filter Paper: Grade 540 Circles Whatman  1540-125

packaging pack of 100

Use as a gravimetric filter during analysis of metals in acidic or alkaline solutions and in the collection of hydroxides. Whatman™ Quantitative Filter Paper: Grade 540 Circles acid-treated surface prevents tearing during filtration and allows the user to scrape precipitates from the paper.

Whatman hardened ashless quantitative filter papers are acid-hardened to give high wet strength and chemical resistance with extremely low ash content. They are suitable for a wide range of critical filtration procedures.
High-purity, acid-treated cellulose lab filter paper
Mechanically strong 
Well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples
Extremely low ash content (0.006% ash maximum)
Nominal particle retention of 8 µm
Medium flow rate (Herzberg filtration speed 200 s)

Airflow Rate 13 s/100 mL/in2
Format Circle
Particle Retention 8μm
For Use With (Application)
Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis.
Porosity Medium
Thickness (Metric) 160 μm
Description Grade 540 Ashless General Lab Filter Paper, 125 mm circles (100 pcs)
Material High-quality Cotton Linters
Filtration Speed ASTM, 55 seconds; Herzberg, 200 seconds
Grade Grade 540
Quantity 100/Pk.
Type Hardened Ashless
Diameter (Metric) 125 mm

New and sealed in manufacturers original packaging,