Niskopopiołowe filtry ilościowe - wzmocnione Grade 50

Najcieńsze Utwardzone papiery filtracyjne Whatman do filtracji próżniowej na lejkach Büchnera i Hirscha. Wysoka retencja bardzo drobnych, krystalicznych osadów.
GE’s thinnest Whatman brand hardened filter paper, highly glazed Grade 50 supports vacuum filtration in Büchner funnels or Hirsch funnels and enables strong retention of very fine crystalline precipitates.

• Thinner filter design (average thickness 115 µm) than most Büchner filter papers
• Acid-treated for high wet-strength and chemical resistance
• Nominal particle retention of 2.7 µm
• Slow flow rates (Herzberg filtration speed 2685 s)
• High purity and low ash content (0.015% ash maximum)
• Compatible with Hirsch or Büchner funnels

GE offers three grades of hardened low ash filters. All three are designed for use in Hirsch and Büchner funnel applications and can be customized for an exact fit.

Wet-strengthened filters for vacuum filtration
For many vacuum filtration applications, a thin filter paper with a slow flow rate and excellent wet strength can maintain sample quality and purity. Because Grade 50 thin filter papers are hardened to minimize fiber shredding, they are a good choice for use as carriers in integrated circuits.

Grade 50 thin filter paper from GE Healthcare’s Life Sciences business is very strong when wet. It will withstand wet handling and precipitate removal by scraping.

Grade 50 is also available in Smear Tab format for wipe testing (e.g., testing of surfaces for radionuclide contamination).
Grade Grade 50 
Type Hardened low ash 
Typical Particle Retention in Liquid 2.7 µm 
Nominal Thickness 115 µm
Typical water flow rate 10 ml/min 
Nominal Basis Weight 96 g/m2
Nominal Air Flow Rate 144 s/100 mL/in2
Nominal Ash Content 0.015% 
Material High-quality cotton linters 
Alpha Cellulose Content Min. ≥98% 
Product Product Name Dimensions
1450-042 Grade 50 Filter for Quantitative Analysis; Thin; 42.5 mm circle (100 pcs) 42.5 mm
1450-055 Grade 50 Filter for Quantitative Analysis; Thin; 55 mm circle (100 pcs) fi 55 mm
1450-070 Grade 50 Filter for Quantitative Analysis; Thin; 70 mm circle (100 pcs) fi 70 mm
1450-090 Grade 50 Filter for Quantitative Analysis; Thin; 90 mm circle (100 pcs) fi 90 mm
1450-110 Grade 50 Filter for Quantitative Analysis; Thin; 110 mm circle (100 pcs) fi 110 mm
1450-125 Grade 50 Filter for Quantitative Analysis; Thin; 125 mm circle (100 pcs) fi 125 mm
1450-150 Grade 50 Filter for Quantitative Analysis; Thin; 150 mm circle (100 pcs) fi 150 mm
1450-185 Grade 50 Filter for Quantitative Analysis; Thin; 185 mm circle (100 pcs) fi 185 mm
1450-240 Grade 50 Filter for Quantitative Analysis; Thin; 240 mm circle (100 pcs) fi 240 mm
1450-320 Grade 50 Filter for Quantitative Analysis; Thin; 320 mm circle (100 pcs) fi 320 mm
1450-500 Grade 50 Filter for Quantitative Analysis; Thin; 500 mm circle (100 pcs) fi 500 mm
1450-916 Grade 50 Quantitative Filter Paper Hardened Low Ash; sheet; 150 × 230 mm 150 x 230 mm
1450-917 Grade 50 Filter for Quantitative Analysis; Thin; 460 × 570 mm sheet (100 pcs) 460 x 570 mm
1450-993 Grade 50 Filter for Quantitative Analysis; Thin; White Smear Tab Sheet (100 pcs) N/A