Ahlstrom 6130-2700 Qualitative Filter Paper, 27cm Diameter, 6 Micron, Medium Flow, Grade 613 (Pack of 13)

Ahlstrom's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention, filtration speed, loading capacity and wet-strength. Qualitative analysis, low ash content 0.06 percent, untreated, consistent performance, wet-strengthened grades, custom cut. These grades contain a high level of alpha-cellulose that provides high purity but will weaken when wet. The inherent strength of standard (untreated) grades does not pose a problem when they are used in routine quadrant folded applications. We do not recommend these grades for use in vacuum work or when wet handling is required. Ahlstrom 613 is commonly used in student laboratories.

• Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance
• Qualitative grades consist of greater than 95 percent super refined a-cellulose and linter fibers
• Standard qualitative filter papers are suitable for quadrant folded or gravity flow applications
• Qualitative filter paper is a strong filter paper with a medium flow rate and retention
• This strong general-purpose filter is also useful in buchner funnels for barium carbonate, lead chromate and beryllium hydroxides