Quantitative Filter Paper StonyLab 90mm Ashless, 20µm Retention

Description

Product Overview

StonyLab Premium Quantitative Filter Paper is engineered for laboratories that demand high‑precision quantitative and gravimetric analyses. Each sheet measures 90 mm in diameter, providing a standard size that fits most laboratory filtration apparatuses. The filter paper is manufactured from high‑purity cellulose fibers that have undergone a rigorous ash‑removal process, resulting in an ash content of ≤0.01%. This ashless construction eliminates background contamination, allowing scientists to obtain clear filtrates and accurate mass measurements. The uniform pore structure, rated at a 20 µm particle retention threshold, ensures consistent filtration performance across the entire pack of 100 sheets. Filtration speed ranges from 35 to 70 seconds per sheet, balancing rapid processing with thorough particle capture. The product dimensions of 3.54 × 3.54 × 0.79 inches and a lightweight 1.41 oz per pack make storage and handling straightforward. Since its launch on June 6 2023, the filter paper has earned a #61 ranking in the Quantitative Lab Filter Paper subcategory, reflecting strong market acceptance and reliability.

Usage

Designed for a wide range of laboratory applications, StonyLab’s quantitative filter paper excels in gravimetric analysis, precipitation experiments, and the filtration of suspended solids. Researchers can employ the sheets in vacuum filtration setups, gravity‑driven filtration rigs, or even simple funnel assemblies. The ashless nature of the paper makes it ideal for sensitive analytical procedures where trace contaminants could skew results, such as metal ion precipitation, pharmaceutical impurity removal, and environmental sample preparation. Its 20 µm retention capability captures fine particulates while allowing clear liquids to pass, facilitating downstream processes like drying, weighing, and spectroscopic analysis. The consistent pore size across all sheets ensures reproducibility, a critical factor when performing multiple replicates or comparative studies. Because the paper is chemically inert, it does not react with acids, bases, or organic solvents commonly used in laboratory protocols, further expanding its versatility.

Why Choose Us

StonyLab stands behind every sheet of premium quantitative filter paper with a commitment to quality and customer satisfaction. The manufacturing process incorporates a proprietary ash‑removal technique that surpasses industry standards, guaranteeing an ultra‑low ash level that most competitors cannot match. Each batch undergoes rigorous quality control testing, including pore size verification, ash content analysis, and filtration speed assessment, ensuring that every sheet delivers the performance promised on the label. In addition to product excellence, StonyLab provides responsive after‑sales support; customers who receive damaged or defective sheets can contact the support team for immediate replacement or a full refund. This dedication to service has earned the product a perfect 5‑star rating from verified purchasers. Moreover, the packaging of 100 sheets offers a cost‑effective solution for laboratories that require bulk quantities without compromising on consistency or reliability.

Key Features

• Ultra‑low ash content (≤0.01%) delivers contaminant‑free filtrates for accurate measurements
• Consistent 20 µm particle retention ensures reliable capture of fine particulates
• Fast filtration time (35‑70 seconds) improves laboratory workflow efficiency
• Standard 90 mm diameter fits most filtration equipment, reducing the need for adapters
• Dedicated customer support and warranty provide peace of mind for every purchase

FAQ

What types of analyses are best suited for this filter paper?

The paper is ideal for gravimetric and precipitation analyses, as well as any procedure that requires removal of suspended solids or fine particles down to 20 µm. It works well with acids, bases, and organic solvents.

How does the ashless feature benefit my experiments?

By limiting ash to ≤0.01%, the filter paper prevents background contamination that could affect mass measurements or spectroscopic readings, leading to more accurate and reproducible results.

Can I use this filter paper with vacuum filtration systems?

Yes, the 90 mm size is compatible with standard vacuum filtration apparatuses. The low resistance and uniform pore structure allow for efficient vacuum flow without clogging.

What is the recommended storage condition for the filter paper?

Store the sheets in a cool, dry place away from direct sunlight. The sealed packaging protects the paper from moisture and dust, preserving its performance over time.

What should I do if I receive a damaged pack?

Contact StonyLab customer service immediately with your order details. The team will arrange a replacement or refund to ensure you receive a fully functional product.