Quantitative Ashless Filter Paper, 354 Grade, 55mm - 320mm

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£10.48 to £100.79

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Variation ID		Product Code	Pack Size	List Price
13132	photo_camera	354055	55mm x 100 Pack 354055	£10.48
13133	photo_camera	354070	70mm x 100 Pack 354070	£12.12
13134	photo_camera	354090	90mm x 100 Pack 354090	£14.91
13135	photo_camera	354110	110mm x 100 Pack 354110	£18.60
13136	photo_camera	354125	125mm x 100 Pack 354125	£21.69
13137	photo_camera	354150	150mm x 100 Pack 354150	£27.74
13138	photo_camera	354185	185mm x 100 Pack 354185	£38.32
13139	photo_camera	354240	240mm x 100 Pack 354240	£59.12
13140	photo_camera	354300	300mm x 100 Pack 354300	£87.68
13141	photo_camera	354320	320mm x 100 Pack 354320	£100.79

Ashless Quantitative Filter Papers are high-purity filters made from 100% cotton linters and acid-washed to remove impurities. With an ash content of just 0.007%, they are ideal for gravimetric analysis and sample preparation where minimal residue is critical. These papers offer excellent wet strength, making them suitable for use with Buchner funnels in quantitative applications. Available in a wide range of pore sizes and formats, they meet international standards for analytical filtration.

Grade 354: is one of the fastest-filtering ashless papers in the Johnson Test Papers range. With an intermediate pore size of 12–15 µm and a filtration speed of 10 seconds (DIN 53137), it is ideal for high-throughput filtration of coarse and gelatinous precipitates. Grade 354 is commonly used in quantitative air and soil pollution analysis, including the preparation of environmental samples for metals testing. It is also used in steel and pig iron analysis for unstable precipitates such as silicon, where rapid filtration is essential. This grade is suitable for use in high-flow air monitoring systems and is available in a disposable 47 mm filter funnel format for convenience in routine applications.

Application: Wide pore filter paper used for coarse and voluminous precipitates such as iron, aluminium and chromium hydroxides, Si-determination in steel and pig iron analysis.

Key Features

Very Fast Filtration: Ideal for time-sensitive or high-throughput quantitative procedures.

Wide Pore Structure: Efficient for coarse, voluminous, or gelatinous precipitates.

Low Ash Content: 0.007% maximum, making it suitable for combustion and residue weighing.

Instrumental Prep: Supports rapid filtering of digested samples prior to metals analysis.

Convenient Formats: Available in disposable 47 mm filter funnels for easy handling.

Air pollution monitoring at high flow rates (e.g., XRF or gas compound analysis)
Quantitative soil and sludge filtration following acid digestion
Filtration of coarse hydroxides: iron, aluminium, zirconium, chromium, cobalt
Rapid analysis of unstable precipitates like silicon in steel and pig iron
Environmental metals testing in solid sample matrices

Available Grades

Grade	Whatman Equivalent	Speed	Thickness (mm)	Pore Size (μM)	Weight (g/m²)	Filtration Speed (sec*)	Burst Strength (kg/cm²)
351	= No.42	Very Slow Filtering	0.14	2-3	84	180	> 0.20
352	= No.40	Medium Filtering	0.15	3-5	84	100	> 0.20
353	= No.43	Medium fast filtering	0.16	5-8	84	50	< 0.20
354	= No.41	Fast Filtering	0.17	8-12	84	20	> 0.20