Whatman，实验室分离产品的开发和创新者。从滤纸和滤器，到微生物学和色谱产品，Whatman创新的产品和方法使生命科学领域中的科学家，工程师和医护工作者能够更简便，更快捷，更精确，更安全的进行他们的工作。无论是在药物成分分析，物质纯化和鉴定，还是环境应用中的非细胞样品制备，无论何处何地，Whatman公司以其高质量，可靠和创新的产品。
nCellulose Filter 滤纸系列
lQualitative Filter Papers - Standard Grades 定型滤纸-标准级
lQualitative Filter Papers - Wet Strengthened Grades 湿强定性滤纸
lQualitative Filter Papers - Folded (Prepleated Grades) 定性滤纸-折叠（摺状级）
lQuantitative Filter Papers - Ashless Grades (Ash 0.007%) 无灰级定量滤纸
lQuantitative Filter Papers - Hardened Low Ash Grades 硬化低灰定量滤纸
lQuantitative Filter Papers - Hardened Ashless Grades 硬化无灰级别定量滤纸
lFilter Papers for Technical Use 工业应用滤纸
lApplication Specific Filters 特殊应用滤纸
| Cellulose Filter Selection - Trace Elements: typical values (ug/g of paper) | |||||||
| Grade | 1 | 42 | 542 | Grade | 1 | 42 | 542 |
| Aluminum | < 0.5 | 2 | 1 | Iron | 5 | 6 | 3 |
| Antimony | < 0.02 | < 0.02 | < 0.02 | Lead | 0.3 | 0.2 | 0.1 |
| Arsenic | < 0.02 | < 0.02 | < 0.02 | Magnesium | 7 | 1.8 | 0.7 |
| Barium | < 1 | < 1 | < 1 | Manganese | 0.06 | 0.05 | 0.05 |
| Boron | 1 | 1 | 2 | Mercury | < 0.005 | < 0.005 | < 0.005 |
| Bromine | 1 | 1 | 1 | Nitrogen | 23 | 12 | 260 |
| Calcium | 185 | 13 | 8 | Potassium | 3 | 1.5 | 0.6 |
| Chlorine | 130 | 80 | 55 | Silicon | 20 | < 2 | < 2 |
| Chromium | 0.3 | 0.3 | 0.7 | Sodium | 160 | 33 | 8 |
| Copper | 1.2 | 0.3 | 0.2 | Sulfur | 15 | < 5 | < 2 |
| Fluorine | 0.1 | 0.2 | 0.3 | Zinc | 2.4 | 0.6 | 0.3 |
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