Cytiva® Filter Papers, Filter, for Fine Precipitate Retention, Grade 589/3, 12.8mm Circle, 1000 per pack

Whatman Grade 589/3 ashless filter paper from Cytiva is particularly useful in capturing very fine particulate samples such as insoluble molecules in fats or oils or supporting ash free dry mass.

• High purity (< 0.01% ash) for ash free dry mass methods
• ‘Blue ribbon filter’
• Very fine precipitate retention (class 2d acc. to DIN 53 135)
• Herzberg filtration speed of 750 s*
• Also available prepleated as Grade 589/3 ½

*The time taken to filter 100 ml water (20°C) through a filter area of 10 cm²  at a constant pressure of 5 cm water column

Ash free dry mass
Grade 589/3 filter paper from Cytiva's business supports accurate measurement of ash free dry mass. The blue ribbon filter is an established component in a variety of quantitative analysis methods, such as quantification of insoluble contaminants in animal and vegetable fats and oils.

Specifications:

• Grade: Grade 589/3
• Format: Circles
• Type: Ashless
• Typical Thickness: 160 µm
• Basis Weight: 84 g/m²
• Filtration Time to Herzberg: 1500 s
• Filtration Speed (Herzberg): 375 s
• Ash Content 1: 0.01%
• Material: High-quality cotton linters
• Alpha Cellulose Content Min.: 98%
• Ribbon Filter Color: Blue
• Application: Designed for gravimetric analysis and the preparation of samples for instrumental analysis. For very fine precipitates. Slow filter paper with highest efficiency for collecting very small particles. Also used for many analytical routine methods in different industries, e.g., determination of the amount of insoluble contaminants in animal and vegetable fats and oils.
• Diameter: 12.8 mm