Whatman 1001-070 Quantitative Filter Paper Circles 70mm Grade 1 11µm

Description

Product Overview

Whatman’s 1001-070 quantitative filter paper circles are engineered to meet the demanding standards of modern laboratories. Each circle measures 70mm in diameter and conforms to Grade 1 specifications, guaranteeing uniform thickness and consistent pore distribution. The 11 µm pore size enables precise separation of fine particulates while maintaining a high flow rate of 10.5 seconds per 100 mL per square inch, which translates to efficient processing times for routine analyses.

The filter paper is manufactured from high‑purity cellulose fibers that have been rigorously tested for chemical compatibility, ensuring that the material does not interact with a wide range of solvents, acids, and bases. This inertness makes the product suitable for applications ranging from simple clarification of aqueous solutions to more complex procedures involving organic solvents. The circles are supplied in a convenient pack of 100, allowing laboratories to maintain a ready stock without the need for frequent re‑ordering.

Beyond its core specifications, the product benefits from a robust quality‑control regime at Whatman’s facilities. Each batch undergoes microscopic inspection to verify pore uniformity, and flow‑rate testing is performed under standardized conditions to confirm compliance with the advertised performance metrics. The result is a filter paper that delivers repeatable, reliable results, reducing variability in experimental outcomes.

Designed with user convenience in mind, the circles can be easily placed into standard filter holders, vacuum manifolds, or custom filtration rigs. Their flat, rigid structure minimizes the risk of tearing during handling, and the 70mm diameter aligns with common laboratory equipment dimensions, eliminating the need for adapters or modifications.

Usage

These filter paper circles find extensive use across multiple sectors. In the food industry, they are employed to clarify juices, dairy extracts, and beverage samples, ensuring that downstream analytical methods such as HPLC or spectrophotometry receive clear, particle‑free solutions. Agricultural laboratories rely on the circles to filter soil extracts and pesticide residues, facilitating accurate quantification of contaminants.

Environmental monitoring professionals use the paper to capture airborne particulates and to prepare samples for gas detection assays. The high flow rate allows rapid processing of large volumes, which is essential when monitoring air quality over extended periods. In academic settings, the circles serve as a teaching tool for demonstrating basic separation techniques, reinforcing theoretical concepts with hands‑on experience.

Because the filter paper is chemically inert, it is also suitable for preparing samples for mass spectrometry, where contamination can compromise results. Researchers working with delicate biomolecules appreciate the low binding characteristics of the cellulose substrate, which helps preserve sample integrity throughout the filtration step.

Why Choose Us

Choosing Whatman’s quantitative filter paper circles means selecting a product backed by decades of expertise in membrane technology. The brand’s reputation for consistency and reliability is reinforced by independent laboratory testing and positive customer reviews, reflected in a solid 3.8‑star rating across multiple platforms.

Whatman’s commitment to sustainability is evident in the sourcing of its raw materials. The cellulose fibers are derived from responsibly managed forests, and the manufacturing process adheres to strict environmental standards, reducing waste and energy consumption.

Customers benefit from comprehensive technical support. Whether you need assistance selecting the appropriate filter grade or troubleshooting an unexpected flow‑rate deviation, Whatman’s knowledgeable service team is available to provide guidance, ensuring that you achieve optimal performance in every application.

Furthermore, the product’s packaging includes clear labeling of dimensions, grade, and flow specifications, simplifying inventory management and compliance with laboratory documentation requirements.

Key Features

• Uniform 70 mm Grade 1 circles deliver consistent filtration results across all batches.
• 11 µm pore size provides fine particle retention while maintaining a rapid flow rate.
• High‑purity cellulose material ensures chemical compatibility with a broad range of solvents.
• Pack of 100 circles offers convenient bulk supply for busy laboratory environments.
• Dedicated technical support and after‑sales service to assist with any usage questions.

FAQ

What does Grade 1 mean for filter paper?

Grade 1 is a classification that indicates the filter paper has a uniform thickness, low ash content, and consistent pore size distribution. This grade is ideal for quantitative analyses where reproducibility and accuracy are critical.

Can these circles be used with organic solvents?

Yes. The cellulose fibers are chemically inert and have been tested with common organic solvents such as methanol, ethanol, acetone, and chloroform. They do not swell or degrade, preserving filtration performance.

How does the flow rate of 10.5 seconds per 100 mL per square inch compare to other filters?

This flow rate is considered fast for a Grade 1 filter with an 11 µm pore size. It allows rapid processing of large sample volumes, reducing overall analysis time while still providing high‑quality filtration.

Are the circles suitable for educational laboratory exercises?

Absolutely. Their ease of handling, reliable performance, and clear specifications make them an excellent choice for teaching basic filtration techniques in classroom settings.

What warranty or guarantee does Whatman provide?

Whatman offers a satisfaction guarantee on its filter papers. If a batch does not meet the advertised specifications, customers can contact the support team for a replacement or refund, subject to verification of the issue.