Whatman Quantitative Filter Papers, Ashless, Grade 44

Whatman Quantitative Filter Papers, Ashless, Grade 44 GE’s Whatman Grade 44 quantitative paper is a thin version of Grade 42 ashless paper. The thinness reduces the overall ash content, making Grade 44 well suited for analyses relying on ash-free dry weight. Accurate ash free dry mass measurements Fine nominal particle retention rating of 3 µm Filtration speed (Herzberg 995 s) Typical thickness of 180 µm PRODUCT PRODUCT NAME DIMENSIONS 1444-070 Grade 44 Ashless Filter Paper, Thin, 70 mm circle (100 pcs) Ø 70 mm 1444-090 Grade 44 Ashless Filter Paper, Thin, 90 mm circle (100 pcs) Ø 90 mm ...

Whatman Quantitative Filter Papers, Hardened Ashless, Grade 540

Whatman Quantitative Filter Papers, Hardened Ashless, Grade 540 GE’s Whatman Grade 540 is a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples. Acid-treated for high wet-strength Extremely low ash content (0.006% ash maximum) Nominal particle retention of 8 µm Medium flow rate (Herzberg filtration speed 200 s) High chemical resistance to strong acid and alkali suspensions PRODUCT PRODUCT NAME DIAMETER 1540-042 Grade 540 Ashless General Lab Filter Paper, 42.5 mm circles (100 pcs) 42.5 mm 1540-055 ...

Whatman Quantitative Filter Papers, Hardened Ashless, Grade 541

Whatman Quantitative Filter Papers, Hardened Ashless, Grade 541 GE’s Whatman Grade 541 acid hardened cellulose filter paper features high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration. High wet-strength High chemical resistance to strong acid and alkali suspensions Retention of gelatinous precipitate 22 µm nominal particle retention rating Fast flow rate (Herzberg filtration speed 34 s) Maximum of 0.006% ash concentration Along with fast Grade 541 filter paper, the hardened, ashless range from GE Healthcare’s Life Sciences business includes general-purpose Grade 540 and Grade 542 ...

Whatman Quantitative Filter Papers, Hardened Ashless, Grade 542

Whatman Quantitative Filter Papers, Hardened Ashless, Grade 542 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)     PRODUCT PRODUCT NAME DIAMETER 1542-055 Grade 542 Ashless Fine Precipitate FIlter, 55 mm circles (100 pcs) 55 mm 1542-070 Grade 542 Ashless Fine Precipitate FIlter, 70 mm cir ...

Whatman Quantitative Filter Paper, Hardened Low Ash, Grade 50

Whatman Quantitative Filter Paper, Hardened Low Ash, Grade 50 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   PRO ...

Whatman Quantitative Filter Papers, Hardened Low Ash, Grade 52

Whatman Quantitative Filter Papers, Hardened Low Ash, Grade 52 GE’s Whatman Grade 52 is a general-purpose filter paper for quantitative analysis in Büchner funnel and other vacuum filtrations. The acid-hardened surface and low ash content enable efficient precipitate recovery. Manufactured from high-quality cotton linters and treated to remove trace metals High wet-strength and chemical resistance Nominal particle retention of 7 µm Medium flow rate (Herzberg filtration speed 235 s) High purity (0.015% ash maximum) Compatible with Hirsch or Büchner funnel applications   PRODUCT PRODUCT NAME DIAMETER ...

Whatman Quantitative Filter Papers, Hardened Low Ash, Grade 54

Whatman Quantitative Filter Papers, Hardened Low Ash, Grade 54 GE’s Whatman Grade 54 filter paper has high wet strength and a larger nominal particle retention rating than comparable Büchner filtration papers, enabling fast vacuum filtration of coarse precipitates. Acid-treated for high wet-strength and chemical resistance Large nominal particle retention rating of 22 µm Fast filtration speed (Herzberg filtration speed 39 s) High purity (0.015% ash maximum) Compatible with Büchner funnel or Hirsch funnel applications PRODUCT PRODUCT NAME DIMENSIONS 1454-055 Grade 54 Filter for Quantitat ...

Whatman Grade 113 Qualitative Filter Papers

Whatman Grade 113 Qualitative Filter Papers Ultra high loading capacity with a particle retention well suited for use with coarse or gelatinous precipitates. Fastest flow rate of the qualitative grades. Creped surface. Thickest filter paper in the qualitative range. These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. Some wet strengthened grades are available in fold ...

Whatman Grade 114 Qualitative Filter Papers

Whatman Grade 114 Qualitative Filter Papers Only half the thickness of Grade 113 and suitable for coarse or gelatinous precipitates. Smooth surface for easy recovery of precipitates. These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. Some wet strengthened grades are available in folded (prepleated) forms. PRODUCT PRODUCT NAME DIAMETER ...

Whatman Grade 1573 Qualitative Filter Papers

Whatman Grade 1573 Qualitative Filter Papers A fast filter paper with high wet strength. It has a very smooth surface making it easy to scrape or wash off precipitate. These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. Some wet strengthened grades are available in folded (prepleated) forms.   PRODUCT PRODUCT ...