Grade 542 Ashless Fine Precipitate Filter

GE’s Whatman Grade 542 filters are acid hardened to allow high retention of 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)

Slow flow rate filters for gravimetric determination

Hardened Grade 542 quantitative papers enable 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.

Grade 542: 2.7 µm

Specifications:

• Grade: Grade 542
• Format: Circles
• Type: Hardened Ashless
• Typical Particle Retention in Liquid: 2.7 µm
• Typical Water Flow Rate (ml/min) for 9cm diameter: 13
• Nominal Thickness: 150 µm
• Nominal Basis Weight: 96 g/m²
• Nominal Air Flow Rate: 64s/100mL/in²
• Nominal Ash Content: 0.005%
• Material: High-quality cotton linters
• Alpha Cellulose Content Min.: ≥98%
• Typical Trace Element Levels: Aluminium 3.4 µg/g, Antimony <0.5 µg/g, Arsenic <0.5 µg/g, Barium <0.5 µg/g, Boron <1 µg/g, Calcium 14.7 µg/g, Chromium 1.1 µg/g, Copper 8.2 µg/g, Iron 16.3 µg/g, Lead <0.5 µg/g, Magnesium 3.3 µg/g, Manganese <0.5 µg/g, Mercury <0.5 µg/g, Potassium 3.7 µg/g, Silicon <6 µg/g, Sodium 17 µg/g, Zinc 87.8 µg/g

Ordering Information: