Whatman Quantitative Filter Papers, Ashless, Grade 42

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ID	Product Name
28418052	Grade 42 Ashless Filter Paper for Instrumental Analysis, 460 × 570 mm sheet (100 pcs)
28418043	Grade 42 Ashless Filter Paper for Instrumental Analysis, 110 mm circle (100 pcs)
28418044	Grade 42 Ashless Filter Paper for Instrumental Analysis, 125 mm circle (100 pcs)
28418045	Grade 42 Ashless Filter Paper for Instrumental Analysis, 150 mm circle (100 pcs)
28418046	Grade 42 Ashless Filter Paper for Instrumental Analysis, 185 mm circle (100 pcs)
28418048	Grade 42 Ashless Filter Paper for Instrumental Analysis, 240 mm circle (100 pcs)
28418049	Grade 42 Ashless Filter Paper for Instrumental Analysis, 320 mm circle (100 pcs)
28418038	Grade 42 Ashless Filter Paper for Instrumental Analysis, 42.5 mm circle (100 pcs)
28418039	Grade 42 Ashless Filter Paper for Instrumental Analysis, 47 mm circle (100 pcs)
28418040	Grade 42 Ashless Filter Paper for Instrumental Analysis, 55 mm circle (100 pcs)
28418041	Grade 42 Ashless Filter Paper for Instrumental Analysis, 70 mm circle (100 pcs)
28418042	Grade 42 Ashless Filter Paper for Instrumental Analysis, 90 mm circle (100 pcs)
28418050	Grade 42 Quantitative Filter Paper Ashless (Ash 0.007%), sheet, 25.4 × 90 mm

Our high-purity Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.

Ashless: 0.007% ash maximum
Fine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
Herzberg filtration speed of 1870 s
Commonly used as a calcium carbonate filter
Particularly suitable for gravimetric analysis

Whatman Grade 42 quantitative papers from Cytiva business are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.

Other typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Cytiva's Grade 42 filters also makes them suitable for processes that require ashing.

Ashless filter papers for gravimetric and instrumental analysis

Cytiva offers a range of Whatman ashless filter papers for your gravimetric analysis needs. See our other Whatman ashless grades to find the right filter paper for your sample, or use our hardened Whatman ashless filter paper grades if your analysis involves strong acid or alkali suspensions.

What are Whatman ashless quantitative filter papers?

Whatman ashless quantitative filter papers are high-purity filters that support accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis where ash content might affect weight measurements of combusted samples. Cytiva's high-purity Whatman ashless filter papers are suited for:

Environmental analysis: soil filtration analysis, when separating solid matter from aqueous extracts
Retention of small particles
Collection of trace elements and radionuclides from the atmosphere

Are you looking for a filter paper, membrane filter, or syringe filter? Let Cytiva help you find the optimal filter for your needs to ensure reliable analysis with our filter selector and size chart.

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Product	Product Name	Dimensions All Ø 42.5 mm Ø 55 mm Ø 125 mm Ø 150 mm Ø 185 mm Ø 320 mm Ø 90 mm 25.4 x 90 mm 460 x 570 mm Ø 47 mm Ø 70 mm Ø 240 mm Ø 110 mm Flag Ø 79 mm	Price
1442-125	Grade 42 Ashless Filter Paper for Instrumental Analysis, 125 mm circle (100 pcs)	Ø 125 mm	59.24 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-110	Grade 42 Ashless Filter Paper for Instrumental Analysis, 110 mm circle (100 pcs)	Ø 110 mm	51.36 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-055	Grade 42 Ashless Filter Paper for Instrumental Analysis, 55 mm circle (100 pcs)	Ø 55 mm	26.32 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-090	Grade 42 Ashless Filter Paper for Instrumental Analysis, 90 mm circle (100 pcs)	Ø 90 mm	42.04 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-070	Grade 42 Ashless Filter Paper for Instrumental Analysis, 70 mm circle (100 pcs)	Ø 70 mm	31.52 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-917	Grade 42 Ashless Filter Paper for Instrumental Analysis, 460 × 570 mm sheet (100 pcs)	460 x 570 mm	749.55 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-6551	Grade 42 Quantitative Filter Paper Ashless (Ash 0.007%), sheet, 25.4 × 90 mm	25.4 x 90 mm	72.31 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-320	Grade 42 Ashless Filter Paper for Instrumental Analysis, 320 mm circle (100 pcs)	Ø 320 mm	362.02 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-240	Grade 42 Ashless Filter Paper for Instrumental Analysis, 240 mm circle (100 pcs)	Ø 240 mm	176.64 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-185	Grade 42 Ashless Filter Paper for Instrumental Analysis, 185 mm circle (100 pcs)	Ø 185 mm	110.43 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-150	Grade 42 Ashless Filter Paper for Instrumental Analysis, 150 mm circle (100 pcs)	Ø 150 mm	74.98 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-042	Grade 42 Ashless Filter Paper for Instrumental Analysis, 42.5 mm circle (100 pcs)	Ø 42.5 mm	22.36 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-047	Grade 42 Ashless Filter Paper for Instrumental Analysis, 47 mm circle (100 pcs)	Ø 47 mm	28.97 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-971	Grade 42 Ashless Filter Paper for Instrumental Analysis, Flag sheet (100 pcs)	Flag	40.87 USD	Add to cart Get Quote In Stock Stock on request Limited stock
1442-10055	Grade 42 Ashless filter paper for instrumental analysis, 79 mm, circle, (100 pcs)	Ø 79 mm	20.80 USD	Add to cart Get Quote In Stock Stock on request Limited stock

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Whatman Quantitative Filter Papers, Ashless, Grade 42

Whatman Quantitative Filter Papers, Ashless, Grade 42

Ashless filter papers for gravimetric and instrumental analysis

What are Whatman ashless quantitative filter papers?

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