纤维素滤纸是多种多样的微滤工具，其工作原理是将颗粒截留在随机的纤维素纤维基质中。纤维素滤纸可根据其应用分为定量和定性两类。
定性滤纸通常用于测定和识别液体和气体样品中的颗粒，而定量滤纸主要用于重量分析。材料等级的选择通常基于保留特性、流速、过滤器重量和其他规格。查看并比较下表中的所有纤维素滤纸等级。
| Grade | Features & Applications | Nominal Retention | Thickness (mm) | Weight (g/m²) | Water Flow a | Collection Efficiency (%, 0.3 µm DOP) | Wet Strength b | Absorption Speed c | Whatman Equivalent |
|---|---|---|---|---|---|---|---|---|---|
| Sterlitech™ | |||||||||
| CFP 1 | Environmental, soil and seed sampling, liquid/solid separation for food and beverage, photometric staining, gas detection. | 11 µm | 0.2 | 86 | Medium | – | – | – | 1 |
| CFP 2 | General filtration, adsorbent conveyance, air/gas contaminant collection. | 8 µm | 0.17 | 101 | Med-Slow | – | – | – | 2 |
| CFP 3 | Similar to CFP1, with tighter retention. High volume sampling, adsorbent conveyance. Medium filter for botanical extraction. | 6 µm | 0.32 | 190 | Slow | – | – | – | 3 |
| CFP 4 | Prefilter, organic extractions, biological fluid separations, air monitoring. | 25 µm | 0.21 | 94 | Fast | – | – | – | 4 |
| Advantec™ | |||||||||
| No. 1 | Fast flow rate, smooth surface, normal hardness. Retains large crystalline particles and gelatinous precipitates. | Coarse | 0.2 | 90 | 45 s | 65% | 14.3 | 9.0 cm | 4 |
| No. 2 | Fast flow rate, smooth surface, normal hardness. Retains medium crystalline particles. | Medium | 0.26 | 125 | 80 s | 80% | 17.3 | 8.0 cm | 1 |
| No. 231 | Moderate flow rate, smooth surface, normal hardness. Retains crystalline particles. | Medium | 0.18 | 95 | 130 s | – | – | 7.5 cm | – |
| No. 232 | Slow flow rate, smooth surface, normal hardness. Retains medium to medium-fine particles. | Med-Fine | 0.18 | 90 | 250 s | – | – | 5.0 cm | 2 |
| No. 131 | Slow flow rate, smooth surface, normal hardness. High retention efficiencey for fine particles, like barium sulfate. | Med-Fine | 0.25 | 140 | 240 s | 90% | 19.4 | 6.0 cm | – |
| No. 235 | Very slow flow rate, smooth surface, normal hardness. Highest retention efficiency, retaining very fine particles. | Very Fine | 0.17 | 95 | 1,200 s | – | – | 4.0 cm | – |
| No. 101 | Uniformly creped surface, high surface area. Retains large particles. Seed germination. | Coarse/Gelatinous | 0.21 | 80 | 50 s | – | – | 8.0 cm | – |
定量纤维素滤纸-用于重量分析和环境监测
| Grade | Features & Applications | Nominal Retention | Thickness (mm) | Weight (g/m²) | Water Flow a | Collection Efficiency (%, 0.3 µm DOP) | Wet Strength b | Adsorption Speed c | Whatman Equivalent |
|---|---|---|---|---|---|---|---|---|---|
| Sterlitech™ | |||||||||
| CFP 40 | Soil and air sample analysis, liquid food sedimentation, sample prep for spectrophotometry. | 8-10 µm | 0.2 | 85 | Medium | – | – | – | 40 |
| CFP 41 | Loose retention. Prefiltration of gelatinous precipitates. Coarse filter for botanical extraction. | 19-26 µm | 0.22 | 85 | Fast | – | – | – | 41 |
| CFP 42 | Gravimetric analysis of fine precipitates. | 2-3 µm | 0.17 | 140 | Slow | – | – | – | 42 |
| CFP 43 | Gravimetric analysis of soil samples, water and air monitoring. | 15-17 µm | 0.21 | 85 | Medium | – | – | – | 43 |
| CFP 44 | Fine precipitate analysis. | 1.5-3.5 µm | 0.165 | 85 | Slow | – | – | – | 44 |
| Advantec™ | |||||||||
| No. 3 | Fast flow rate. Ashless. Analysis of soils, fertilizers, cement, and minerals. | 5-10 µm | 0.23 | 113 | 130 s | 80% | 19.4 | 7.5 cm | 6 |
| No. 5a | Fast flow rate, high purity. Ashless. Filtration of hydroxides, metallic aerosols, environmental monitoring, silica content determination in steel. | >10 µm | 0.22 | 97 | 60 s | 75% | 14.3 | 9.5 cm | 41 |
| No. 5b | Fast flow rate, high purity. Ashless. General gravimetric analysis, retention of SrSO4, BaSO4, HgCrO4, and collodial dispersions. | 5-10 µm | 0.21 | 108 | 195 s | 90% | 19.4 | 7.0 cm | 40 |
| No. 5c | Medium flow rate, high purity. Ashless. Retains medium-fine particles, trace, and precious metals. | <5 µm | 0.22 | 118 | 570 s | 93% | 24.5 | 6.0 cm | 42 |
| No. 6 | Ashless. Retention of medium-fine particles, trace, and precious metals. | 2-10 µm | 0.2 | 103 | 300 s | 90% | 14.3 | 6.0 cm | 42 |
| No. 7 | Highest purity, ashless. Precise gravimetric analysis. | 5-10 µm | 0.18 | 87 | 200 s | 85% | 11.2 | 7.0 cm | 40, 43, 540 |