Product Details
Qualitative cellulose filter papers perform separation by entrapping particulate within the random matrix of cellulose fibers throughout the depth of the media and are widely used in methods requiring determination and identification of particulate in both liquids and gases. This natural fiber filter paper is commonly used to clarify liquid samples and is more convenient than flat filters when used in a filter funnel due to its sharply creased prefolded pattern, which reduces preparation time. These filter papers are widely used for general laboratory separation, clarification applications, and soil analysis methods. Quantitative cellulose filter papers are primarily used in gravimetric analysis procedures and also perform separations by entrapping particulate within the random matrix of cellulose fibers throughout the depth of the media. They are used to prepare samples for further testing with various types of instrumentation. These very high-quality filter papers are manufactured from refined pulp and alpha linters, acid washed, and have an extremely low ash content. Filter media terms include nomenclature serialized without indication of grade or quality; furnish, referring to raw materials in wet-laid product manufacture; ash content determined by dry method in exposure at 900°C in a muffle furnace; retention as nominal retention of particulate at 98% efficiency in liquid; flow representing liquid flow rate speed relative to comparable products; basis weight as nominal weight of material per m² at 8% moisture; thickness measured under 4 psi using TAPPI method T411; flat or fluted stock supplied as sheets, rolls, or die-cut parts, with fluted having 1/4 or 1/2 quadrant funnel folding; and surface stated relative to comparables.
