Description
Advantec MFS™ No. 231 Grade Medium Qualitative Filter Paper, 4.25 cm diameter, 100/Pk, N02314.25CMQualitative Filter Paper Features:
¹ Flow time is the time in seconds required to filter 100 mL of distilled water at 20 °C under pressure supplied by a 10 cm water column through a 10 cm² section of filter paper² Absorption speed is the distance in cm that water will travel in an upright strip of filter paper in ten (10) minutes at 20 °C³ Wet strength is the height in cm of a water column that will rupture a 10 cm² section of filter paper
- 100% alpha cotton cellulose
- pH tolerant 0 to 12
- Temperature maximum 120 °C
- Wide selection of types and sizes
- Ash content 0.1%
- Clarify and remove preciptates
- Preparation of qualitative analysis
| Grade | No. 231 |
| Characteristics | Retains crystalline precipitates, moderate flow rate, smooth surface, normal hardness |
| Diameter, cm | 4.25 |
| Weight, g/m² | 95 |
| Thickness, mm | 0.18 |
| Flow Time, sec¹ | 130 |
| Absorption Speed, cm² | 7.5 |
| Wet Strength, cm H2O³ | N/A |
| Retention Characteristic, µm | Medium |
| Collection Efficiency, %, 0.3 µm DOP | N/A |
| Conversions | |
| Whatman | 1 |
| Schleicher & Schuell | N/A |