Whatman Grade 589/3 ashless filter paper 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 ˝
*The time taken to filter 100 ml water (20°C) through a filter area of 10 cm˛ at a constant pressure of 5 cm water column
Ash free dry mass
Grade 589/3 filter paper 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.