Glass Microfiber Filters/3.20cm


Ahlstrom-Munksjö offers a full range of glass microfiber filters manufactured from 100% pure borosilicate glass. Because of their intrinsic properties, glass microfiber filters have wide applications in many areas of laboratory analysis, especially when fine filtration and high loading capacity is required. Applications for Ahlstrom-Munksjö glass microfiber filters include environmental analysis for water, wastewater, testing of soils, air pollution and monitoring, research and process biochemistry, and gravimetric analysis involving ignition of samples. Ahlstrom-Munksjö glass microfiber filters are also found in the filtration of hot gases and liquids, and in pre-filtration. 

Standard Glass Microfiber Filters

Standard glass microfiber filters contain no binders or other additives that may cause interference to sensitive enzymatic or other chemical reactions. The unique characteristics of glass microfiber filters make its use particularly advantageous to laboratory filtration by enabling fast filtration of large volumes and difficult solutions without premature clogging.



Retention in µm Filtration Speed
Herzberg sec/100mls
Filtration Speed
Rapidity mls/min
Loading Capacity GE Whatman Cross Reference
151* 0.7 274 25 Very High GF/F
121* 1.0 143 48 Very High GF/B
131* 1.0 88 78 Very High GF/C
161* 1.1 67 102 Very High 934-AH
111* 1.2 53 130 Very High GF/A
141* 3.1 19 350 Very High GF/D
169* 1.0 53 130 Very High


Products for Suspended Solids Analysis

Standard Method 2450 for measuring solids in water calls for a glass filter disc without organic binder for some steps. It is important for this gravimetric test that the filter itself not change weight so that the solids can be accurately measured.

Grade 169* - Volatile Suspended Solids
Grade 161* - Total Suspended Solids

Filter Papers for TCLP

Ahlstrom-Munksjö offers three microfiber glass grades for use in the toxicity characteristic leaching procedure (TCLP) as described in EPA Method 1311.

Grade 151* - Standard TCLP Filter
Grade 193* - Low Metal TCLP Filter
Grade 26* - Pre-washed Low Metal TCLP Filter

*View Ahlstrom Guide for more information

Key Features

  • Qualitative and laboratory analysis
  • 100% pure borosilicate glass
  • Rapid flow rate 
  • Fine particle retention 0.7µm-3.1µm
  • High loading capacity
  • Chemical and thermal resistance (up to 500° C)
  • Long shelf life
  • Brilliant white color reflecting more than 96% of visible light
  • Custom cut 
*View Ahlstrom Guide for More Information