Whatman Ashless Quantitative Filter Paper 50mm 4-12µm Grade 589/2 100

Description

Product Overview

The Whatman Ashless Quantitative Filter Paper is engineered for precise laboratory filtration tasks that demand consistent particle retention and minimal ash interference. With a 50 mm diameter and a retention range of 4‑12 µm, this filter paper meets DIN 53 135 class 2b specifications, making it suitable for medium‑fine precipitate work. Its basis weight of 85 g/m² and typical thickness of 180 µm provide a balanced combination of strength and flexibility, allowing easy handling while maintaining structural integrity during filtration processes.

Manufactured by Whatman, a trusted name in laboratory consumables, the paper features an ashless composition with an ash content of only 0.01 %. This low ash level is critical for quantitative analyses where any residual ash could skew results, ensuring that the measured values reflect the true composition of the sample. The product is supplied in a pack of 100 sheets, each individually cut to a precise 50 mm diameter, facilitating quick setup and consistent performance across multiple experiments.

Usage

Designed for a broad spectrum of quantitative laboratory methods, this filter paper excels in applications such as sand content determination in foodstuffs, flour grading, and the analysis of aqueous suspensions. Its medium filtration speed, rated at 70 herzberg, enables efficient processing without compromising the resolution needed for fine particle separation. The ashless nature of the paper makes it ideal for methods where trace contaminants could affect analytical outcomes, such as gravimetric determinations and spectrophotometric assays.

Researchers and quality control technicians in food science, environmental testing, and material science laboratories will find this filter paper particularly valuable. Its compatibility with standard laboratory filtration equipment, including funnel assemblies and vacuum filtration setups, ensures seamless integration into existing workflows. The 50 mm size fits most standard filter holders, reducing the need for additional adapters or custom equipment.

Why Choose Us

Choosing the Whatman Ashless Quantitative Filter Paper means selecting a product backed by decades of scientific expertise and rigorous quality assurance. Each batch undergoes comprehensive testing to verify particle retention, ash content, and mechanical strength, guaranteeing reproducible results across different laboratories and geographic locations. The paper’s consistent thickness and basis weight contribute to uniform flow rates, minimizing variability between runs.

Our commitment to sustainability is reflected in the ashless formulation, which reduces waste and simplifies post‑filtration disposal. Additionally, the packaging is designed for convenience and protection, with each sheet sealed to prevent moisture absorption that could alter performance. Should you encounter any issues, our dedicated technical support team is available to provide guidance on optimal usage and troubleshooting.

Key Features

• Consistent 4‑12 µm retention ensures reliable separation of medium‑fine particles.
• Low ash content (0.01 %) eliminates background interference for accurate quantitative results.
• Standard 50 mm diameter fits most laboratory filter holders, simplifying setup.
• Durable 85 g/m² basis weight provides strength while maintaining flexibility during filtration.
• Responsive customer support and technical assistance for seamless laboratory integration.

FAQ

What does “ashless” mean and why is it important?

“Ashless” indicates that the filter paper contains a very low amount of inorganic residue after combustion, typically 0.01 % ash. This is crucial for quantitative analyses because any residual ash can add weight or interfere with chemical reactions, leading to inaccurate results.

Can this filter paper be used with vacuum filtration systems?

Yes, the 50 mm diameter and robust construction make it compatible with standard vacuum filtration apparatuses. The paper’s strength prevents tearing under reduced pressure, ensuring a smooth filtration process.

What types of analyses benefit most from this filter paper?

Methods that require precise particle size retention and low background interference, such as sand content determination in food products, flour grading, and analysis of aqueous suspensions, benefit greatly from this ashless quantitative filter paper.

How should the filter paper be stored to maintain performance?

Store the sheets in a cool, dry environment away from direct sunlight. Keep the packaging sealed until use to protect the paper from moisture, which could affect flow rates and retention characteristics.

Is the product compliant with any industry standards?

Yes, the filter paper conforms to DIN 53 135 class 2b specifications for ashless quantitative filtration, ensuring it meets recognized quality and performance criteria for laboratory use.