Cytiva Whatman™ Quantitative Filter Paper: Grade 540 Circles

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.

Product Code	Brand	Diameter (Metric)
11310514	Cytiva 1540-321	21 mm
11320514	Cytiva 1540-324	24 mm
11330514	Cytiva 1540-042	42.5 mm
11332865	Cytiva 1540-055	55 mm
10194111	Cytiva 1540-090	90 mm
10072071	Cytiva 1540-110	110 mm
10586161	Cytiva 1540-125	125 mm
10092081	Cytiva 1540-150	150 mm
11342995	Cytiva 1540-185	185 mm
11380504	Cytiva 1540-240	240 mm

Description

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 8μm
• Medium flow rate (Herzberg filtration speed 200s)

Specifications

• Airflow Rate: 13 s/100 mL/in²
• Material: Cotton Linters
• Filtration Speed: ASTM, 55 seconds; Herzberg, 200 seconds
• Grade: Grade 540
• Quantity: 100/Pk.
• Type: Hardened Ashless

• Format: Disc
• Particle Retention: 8 μm
• 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