Product Details
Qualitative cellulose filter papers perform separation by entrapping particulate within the random matrix of cellulose fibers in the depth of the media, widely used for determining and identifying particulate in both liquids and gases, as well as clarifying liquid samples. These natural fiber filter papers are easier to use and more convenient than flat filters when used in a filter funnel due to their sharply creased prefolded pattern, reducing preparation time. They are commonly used for general laboratory separation, clarification applications, and soil analysis methods. Quantitative cellulose filter papers are primarily employed in gravimetric analysis procedures and sample preparation for further testing with various instrumentation. Manufactured from refined pulp and alpha linters, these very high-quality filter papers are acid washed and exhibit extremely low ash content, which is determined by the dry method at 900°C in a muffle furnace. Filter media nomenclature is serialized with no indication of grade or quality, while furnish refers to raw materials used in wet laid product manufacture. Particle retention is nominal at 98% efficiency in liquid, and flow rate indicates liquid flow speed relative to comparable products. Basis weight represents the nominal weight per square meter at 8% moisture content, thickness is measured under 4 psi using TAPPI method T411. Filter paper is supplied as flat stock in sheets, rolls, or die-cut parts, or fluted with 1/4 or 1/2 quadrant funnel folding. The surface characteristic is stated relative to comparable products. The kit and package include the specified qualitative or quantitative cellulose filter paper formats suitable for laboratory separation, clarification, gravimetric analysis, and soil analysis, with dimensions and specifications conforming to the described measurement standards. The product carries standard warranty terms ensuring quality and performance compliance.
