Whatman No. 1

Name: Whatman No. 1
Brand: Whatman
SKU: 68741
Availability: PreOrder

UsedWhatmanFiltration suppliesNetherlands

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Particle retention: 11 µm
Particle retention in liquid: 11 µm
Nominal thickness: 180 µm
Basis weight: 87 g/m²
Surface: Smooth
Availability: Procurable
Lead time: Confirmed with your quote

All 15 specifications

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Specifications 15

Brands: Whatman
New/Used: Used
Particle retention: 11 µm
Particle retention in liquid: 11 µm
Nominal thickness: 180 µm
Basis weight: 87 g/m²
Surface: Smooth
Flow rate: 57 ml/min

Air flow rate: 13 s/100 ml/in
Filtration speed (Herzberg): 150 s/100 ml
Filtration speed (ASTM): 40 s/100 ml
Material: Cellulose
Ash content: 0.06%
Availability: Procurable
Lead time: Confirmed with your quote

Product description

High-quality qualitative filter paper with 11 µm particle retention and 57 ml/min flow rate for routine filtration.

Whatman No. 1 filter paper is a widely used, high-quality qualitative filter paper designed for routine laboratory applications requiring medium retention and flow rates.

Key features:

Particle retention: 11 µm, suitable for medium-sized particles.
Nominal thickness: 180 µm, providing durability and ease of handling.
Flow rate: 57 ml/min, ensuring efficient filtration processes.
Material: Made from high-quality cellulose fibres, ensuring consistent performance.
Low ash content: 0.06%, minimising interference in analytical procedures.

Applications:

Qualitative analytical separations: Ideal for precipitates such as lead sulphate, calcium oxalate (hot), and calcium carbonate.
Agricultural analysis: Used in soil testing and seed analysis procedures.
Food and beverage industry: Employed to separate solid foodstuffs from liquids and for clarifying beverages.
Air pollution monitoring: Collects atmospheric dust for photometric analysis.
Educational purposes: Widely used in teaching qualitative analytical techniques.

Commonly used in:

University laboratories
Research institutions
Agricultural testing facilities
Food and beverage quality control labs
Environmental monitoring agencies

Introduced in 1740 by James Whatman, this filter paper has remained a staple in laboratories worldwide, demonstrating its enduring relevance and reliability.

Why Questpair exists

Lab equipment markets are fragmented. Buyers spend weeks calling distributors, comparing quotes, and verifying supplier reliability. Sellers struggle to reach global research labs.

We built Questpair to fix this. Every supplier on the platform is verified before listing. Every quote you receive comes from a real, vetted seller. AI prepares your case in minutes, then a real specialist takes over.

We're an independent team based in The Netherlands, working with research labs and procurement teams across Europe and worldwide.

Frequently asked questions

How long does laboratory equipment typically last?

With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.

Can I get service for older equipment?

Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options alongside the offer.

Where can I buy parts?

Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.

What is the typical lead time for refurbished equipment?

Two to six weeks, depending on refurbishment scope and whether calibration is included.

Does laboratory equipment ship internationally?

We ship to 38 countries. Crating and customs handling are quoted with the instrument.