Whatman 1001-813 Qualitative Filter Paper Sheet, 11 µm, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 31mm Length, 26mm Width (Pack of 1000)

• 2.6 x 3.1cm sheets
• Grade 1
• Covers a wide range of laboratory applications; frequently used for clarifying liquids
• Areas of use include the food industry, agriculture, air pollution monitoring, and gas detection
• Widely used in education for teaching simple qualitative analytical separations

This Whatman 2.6 x 3.1cm, grade 1, cellulose filter paper sheet is the most widely used filter paper for routine applications with medium retention (11µm) and flow rate. Traditionally the grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate. In agriculture, it is used for soil analysis and seed testing procedures. In the food industry, Grade 1 is used for numerous routine techniques to separate solid foodstuffs from associated liquid or extracting liquid and is widely used in education for teaching simple qualitative analytical separations. In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain-intensity measured photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and color formation quantified by optical reflectance. Retention: 11µm. Size: 2.6 x 3.1cm Sheets. 1000/Pack. Whatman #: 1001-813.