Qualitative Filter Papers- No. 642– 11.0cm (100PK)
sku#:
255-0344
In stock
Qualitative Filter Papers - No.642
Ahlstrom’s qualitative grades of filter paper are, by definition, recommended for use in analytical ethods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance. 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. All our qualitative grades consist of > 95% super refined α - cellulose and linter fibers
Key Features
Qualitative analysis Low Ash Content Untreated Consistent Performance Wet- Strengthened Grades - Available Custom Cut Bulk Packaging
Specs.
Retention In um: 2.0 Filtration Speed Herzberg sec/100mls : 229 Filtration Speed Rapidity mls/min: 30 Load Capacity: Medium Cross Reference: 2
Standard Grades (Non Wet-Strengthened)
Standard qualitative filter papers are suitable for quadrant folded or gravity flowapplications. These grades contain a high level of alpha-cellulose that provides high puritybut will weaken when wet. The inherent strength of standard (untreated) grades does notpose a problem when they are used in routine quadrant folded applications. We do notrecommend these grades for use in vacuum work or when wet handling is required.
Ahlstrom 642: 2μm – Medium Speed
This grade has finer particle retentionthan Ahlstrom 601 but with slightly lowerfiltration speed. Ahlstrom 642 also has higherabsorption than Ahlstrom 601. It is used ingeneral laboratory applications to retainparticles above 2 μm in size. Ahlstrom 642 isalso found in agricultural and environmentallaboratories for plant growth trials, soiltesting, and air analysis for monitoringspecific contaminants and in the filtration oforganic and sulfide precipitates.
Ahlstrom’s qualitative grades of filter paper are, by definition, recommended for use in analytical ethods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance. 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. All our qualitative grades consist of > 95% super refined α - cellulose and linter fibers
Key Features
Specs.
Standard Grades (Non Wet-Strengthened)
Standard qualitative filter papers are suitable for quadrant folded or gravity flowapplications. These grades contain a high level of alpha-cellulose that provides high puritybut will weaken when wet. The inherent strength of standard (untreated) grades does notpose a problem when they are used in routine quadrant folded applications. We do notrecommend these grades for use in vacuum work or when wet handling is required.
Ahlstrom 642: 2μm – Medium Speed
This grade has finer particle retentionthan Ahlstrom 601 but with slightly lowerfiltration speed. Ahlstrom 642 also has higherabsorption than Ahlstrom 601. It is used ingeneral laboratory applications to retainparticles above 2 μm in size. Ahlstrom 642 isalso found in agricultural and environmentallaboratories for plant growth trials, soiltesting, and air analysis for monitoringspecific contaminants and in the filtration oforganic and sulfide precipitates.
| Brand | AHLSTROM FILTRATION LLC |
|---|---|
| Product Type | |
| Pack Size | 1.0000 |
| UOM | PK |
| Supplier Part Number | 6420-1100 |