Qualitative Lab Filter Papers/613

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Ahlstrom-Munksjö's qualitative grades of laboratory filter paper are recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative lab filter papers are often used in routine separation work that still requires high purity and consistent performance. 

Ahlstrom-Munksjö offers a complete range of low ash lab filter papers for general laboratory work that provides the ideal combination or particle retention, filtration speed, loading capacity, and wet-strength. All of our qualitative lab filter grades consist of >95% super refined α-cellulose and linter fibers.

Standard Grades Retention in µm Filtering Speed Herzberg sec/100mls Filtering Speed Rapidity mls/min Loading Capacity GE Whatman Cross Reference
610 1.5 1724 4 Medium 5
642 2.0 229 30 Medium 2
601 2.5 124 55 Medium 1
237 3.0 114 60 Very High 3
609 4.0 98 70 Medium -
627 4.0 80 85 High -
613 6.0 114 60 Medium Student Grade
631 10.0 34 200 High 4
615 25.0 29 235 High -
617 35.0 19 360 Very High -
Wet-Strength Grades Retention in µm Filtering Speed Herzberg sec/100mls Filtering Speed Rapidity mls/min Loading Capacity GE Whatman Cross Reference
950 2.0 491 14 Medium 6
909 3.0 105 65 Medium 91
962 27.0 28 245 High 114
961 40.0 19 360 Very High 113

Key Features

  • Qualitative analysis
  • Low ash content 0.06% 
  • Untreated
  • Consistent performance
  • Wet-strengthened grades available
  • Custom cut
  • Bulk packaging
View Ahlstrom Guide for More Information