Filter Paper Class 41 Ashless

Filter Paper Class 41 Ashless – Fine, High-Speed Quantitative Filter Paper

Filter Paper Class 41 Ashless is a fine-retention, high-speed quantitative filter paper engineered for laboratories requiring rapid filtration with extremely low ash residue. Manufactured from ultra-pure cotton linters and refined to achieve maximum alpha-cellulose content, Grade 41 provides excellent purity and consistent analytical performance.

With an ash content of ≤0.0009%, this ashless paper offers precise separation of fine particles while maintaining one of the fastest flow rates among quantitative-grade papers.

Available Sizes

70mm • 90mm • 110mm • 125mm

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Key Features

• Ash content ≤0.0009% for high-accuracy quantitative work

• Fast-flow ashless filter paper with fine retention

• Manufactured from high-purity alpha-cellulose fibers

• Ideal for filtering small precipitates without sacrificing speed

• Smooth sheet structure with strong wet strength

• Reliable and consistent performance for analytical laboratories

• High clarity of filtrate suitable for advanced instrumental analysis

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Ideal Applications for Grade 41

Grade 41 Ashless is designed for situations where speed, purity, and fine particle capture are all required. Common uses include:

• Quantitative chemical analysis

• Rapid filtering of fine precipitates

• Preparation of samples for AAS, ICP, XRF, and gravimetric methods

• Environmental testing and water analysis

• Metal content determination (Zinc, Lead, Molybdenum, etc.)

• High-throughput laboratory workflows requiring fast turnaround

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Why Choose FilterLab Class 41 Ashless?

Compared to other ashless papers, Grade 41 offers the fastest flow rate, making it ideal for time-sensitive quantitative analyses. Its combination of fine retention and ultra-low ash residue ensures that analytical results remain uncompromised by contaminants.

As part of FilterLab’s quantitative range—alongside the slightly slower, higher-loading Grade 40—Grade 41 gives laboratories the flexibility to choose the optimal paper for their workflow.

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Delivery

We supply and deliver across Johannesburg, including Pretoria, Vereeniging, East Rand, South Rand, West Rand, with nationwide courier delivery throughout South Africa.