Whatman 1440-329 Ashless Quantitative Filter Paper 3.0cm 8µm Grade 40

Description

Product Overview

The Whatman 1440-329 ashless quantitative filter paper is engineered for laboratory professionals who demand consistent performance and high purity in their analytical workflows. Each disc measures 3.0 cm in diameter and offers an 8 µm retention rating, providing a reliable medium‑speed filtration that balances throughput with fine particle capture. Manufactured by Whatman, a trusted name in laboratory filtration, this grade 40 filter paper is designed to meet the rigorous standards of quantitative gravimetric analysis across a broad spectrum of industrial and scientific applications.

Key specifications include a lightweight package dimension of 3.3 × 3 × 0.9 inches, a net weight of 0.72 ounces per pack, and a model number F1220-04. The product is certified ashless, meaning it contains no inorganic residues that could interfere with trace element detection or spectrophotometric measurements. Its high purity makes it suitable for collecting trace elements, radionuclides, and other ultra‑low‑concentration analytes from environmental samples.

Usage

Designed for versatility, the 1440-329 filter paper excels in a variety of laboratory settings. In cement and concrete research, it enables accurate gravimetric determination of calcium carbonate content, helping engineers assess material quality and durability. In mineralogy, the paper’s fine retention captures clay particles and iron oxides, supporting detailed compositional analysis of geological samples.

Environmental scientists rely on this filter paper for soil extraction procedures, where it separates solid matter from aqueous extracts, ensuring clean filtrates for subsequent chemical assays. In the food industry, the paper is employed to quantify sediment in milk and dairy products, providing a reliable method for quality control and regulatory compliance. Additionally, its ashless nature makes it an ideal pre‑filtration step before atomic absorption spectrophotometry, protecting sensitive instrumentation from clogging and contamination.

Because the filter paper is compatible with standard laboratory filtration apparatus, users can integrate it seamlessly into existing workflows without the need for specialized equipment. Its consistent pore size and uniform thickness guarantee reproducible results, reducing variability and enhancing data reliability across repeated experiments.

Why Choose Us

Choosing the Whatman 1440-329 filter paper means selecting a product backed by decades of scientific expertise and quality assurance. Whatman’s rigorous manufacturing processes include multiple quality control checkpoints, ensuring each disc meets exacting standards for pore uniformity and ash content. This commitment to excellence translates into reduced background interference, higher analytical sensitivity, and longer instrument life for users.

Our packaging of 100 discs per pack offers both convenience and cost efficiency for laboratories with high throughput demands. The product’s robust performance across diverse applications—from metallurgy to environmental monitoring—means you can rely on a single filter paper type for multiple projects, simplifying inventory management and procurement.

We also provide responsive technical support, offering guidance on optimal filtration techniques, troubleshooting assistance, and recommendations for complementary consumables. Our after‑sales service includes a satisfaction guarantee, ensuring that any quality concerns are addressed promptly and professionally.

Key Features

• Consistent 3 cm diameter discs deliver reliable filtration performance across all experiments.
• 8 µm retention captures fine particles while maintaining medium‑speed flow for efficient processing.
• Ashless composition eliminates inorganic residues, protecting sensitive analytical instruments.
• Versatile applicability in cement, clay, steel, soil, and dairy analysis reduces the need for multiple filter types.
• Dedicated customer support and a satisfaction guarantee ensure confidence in every purchase.

FAQ

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

“Ashless” indicates that the filter paper contains no inorganic ash‑forming substances. This is crucial for trace‑element analysis because any residual ash can introduce background signals, skewing results and potentially damaging sensitive equipment such as atomic absorption spectrophotometers.

Can this filter paper be used with standard laboratory filtration equipment?

Yes, the 3 cm diameter discs are compatible with most standard filter holders, funnel assemblies, and vacuum filtration setups commonly found in analytical laboratories. No special adapters are required.

Is the 8 µm retention suitable for all types of gravimetric analysis?

The 8 µm pore size provides a balance between fine particle capture and reasonable flow rates, making it suitable for a wide range of gravimetric applications, including cement, clay, steel, and soil analyses. For ultra‑fine particles, a smaller pore size may be preferred.

How should the filter paper be stored to maintain its performance?

Store the filter paper in a cool, dry environment away from direct sunlight and moisture. The sealed packaging protects the discs from humidity, preserving their pore structure and ashless properties until use.

What support is available if I encounter issues with the product?

Our technical support team is available to answer questions about filtration techniques, troubleshoot performance issues, and provide recommendations for complementary consumables. We also offer a satisfaction guarantee and can arrange replacements if a batch does not meet quality expectations.