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Filter paper, qualitative
Filter
Qualitative filter paper, Grade 604½, folded filters
Fast, 12 to 25µm
- time saving, because folded filters have a larger surface area
- filter faster than comparable circular filters
- for coarse precipitates (e.g. hydroxide and sulphide)
- Weight: 80g/m²
- Thickness: 0.19mm
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Qualitative filter paper, Grade 593 ½, folded filters
Medium to slow 2 to 5µm
- time saving, because folded filters have a larger surface area than comparable circular filters
- for medium to fine precipitates and general laboratory work
- Weight: 85g/m²
- Thickness: 0.17mm
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Syringe filter CHROMAFIL®, Polytetrafluoroethylene (PTFE)
MACHEREY-NAGEL
CHROMAFIL
® syringe filters are used for filtration of suspended matter from liquid samples. HPLC-Certification available on the internet
Polypropylene housing
Better solvent stability compared to acrylate and polystyrene filters
Shells ultrasonically sealed, not glued...
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Filter Papers, Grade 540, quantitative, round
- Acid-treated for high wet-strength
- Extremely low ash content (0.006 % ash maximum)
- Nominal particle retention of 8 µm
- Medium flow rate (Herzberg filtration speed 200 s)
- High chemical resistance to strong acid and alkali suspensions
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Cellulose MN 300, TLC-ready-to-use plates cellulose coated
The primary field of application is the partition chromatography of polar substances such as amino acids, carboxylic acids or carbohydrates. The TLC-plates are available as glass plates, POLYGRAM ® polyester sheets and ALUGRAM ® aluminium sheets.
- Fiber length (95 %) 2-20 µm
- Average degree of polymerization 400-500
- Specific surface according to Blaine 15000 cm2/g
- ≤ 20 ppm Fe, 6 ppm Cu, 7 ppm P
- Dichloromethane extract ≤ 0.25 %
- Residue on ignition at 850 °C ≤ 1500 ppm
- Available with or without fluorescent indicator (UV 254)
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