Description:
Cytiva Whatman 1442-047 Grade 42 Quantitative Ashless Filter Paper, 4.7cm. These high-purity Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. This grade is designed for gravimetric analysis and sample preparation for instrumental analysis. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry. Other typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Cytiva's Grade 42 filters also makes them suitable for processes that require ashing.
Specifications:
| Brand | Cytiva Whatman |
| Product Number | 1442-047 |
| Thickness | 200 µm (typical) |
| Particle Retention | 2.5 µm (Particle retention rating at 98% efficiency), in liquid max. |
| Filtration Speed | 1870 s (Herzberg) |
| Ash Content | 0,007% |
| Airflow Rate | 96 s/100 ml/in² |
| Basis Weight | 100 g/m² |
| Burst Strength | 0.048 bar wet burst; 1.723 bar dry burst |
| Flow Rate | 5 ml/min (Water flow) |
| Tensile Strength | 55.8 N/15 mm, Tensile M/D Dry |
