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- General laboratory consumables
- Occupational safety, Security
- Analytical measurement and testing
- Stirring, Shaking, Mixing
- Sample preparation
- Distillation, separation, filtration
- Heating and cooling technology
- Liquid Handling
- Vacuum technology, Drying, Dry storage
- Optical instruments and microscopes
- Cleaning and sterilisation
- Environmental-, soil-, water-, food analysis
- Chromatography
- Cleanroom
Bottletop dispensers
You can easily and conveniently order bottle top dispensers from LABSOLUTE®, Brand, Hirschmann, Poulten & Graf, Socorex, Vitlab or other brands in the Th. Geyer online shop. The bottle-top dispensers with and without back-dispensing valve are a cost-effective way to measure liquids exactly and repeatedly. The dispensers have a choice of digital or analogue display and are supplied with adapters for all common bottle threads. The wetted components of the attachment burettes are made of inert materials, so that the dispenser can be filled and used with almost any chemical. In addition, there are particularly robust models for difficult applications such as hydrofluoric acid.
Syringe filter Minisart® NML, SFAC
Housing MBS. SFCA / CA (Surfactant-free Cellulose Acetate) membrane. For sterile, particle free, ultrapure filtration of small volumes of liquid up to approx. 100 ml. Colour coded and printed for easy membrane and pore size identification. With hydrophilic cellulose acetate membrane for minimum adsorption. Ready-to-use. With female luer-lock inlet, male luer slip outlet....
Filter paper 595, qualitative, folded filters
Highly pure filter paper (approx. 0.08% ash) recommended for precise identification of materials and for sample preparation prior to sensitive detection methods. These filter papers are perfectly qualified for food control according to LFBG paragraph 64 para. 1 and 2, beverage analysis and environmental monitoring....
Chromatography Paper
Recommended for chromatographic analysis and preparations.
- Made from pure linters with an α-cellulose content of > 98%
- High-performance resolution and wet strength
- The fibres are oriented in predominantly one direction
- Thicker papers allow higher sample volumes
- Lower capillary rises offer higher resolutions
Syringe filter CHROMAFIL®, Polytetrafluoroethylene (PTFE)
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...
Filter Papers, Grade 50, qualitative, circles and sheets
Compatible with Hirsch or Büchner funnels, average thickness 115 µm. Acid-treated for high wet-strength and chemical resistance.
- Nominal particle retention of 2.7 µm
- Slow flow rates (Herzberg filtration speed 2685 s)
- High purity and low ash content (0.015 % ash maximum)
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
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
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)
Blender bags, BagSystem®
These gamma-ray sterilized bags have a high mechanical stability and ensure safety for the samples. The filters inserted in the bags filter the liquid during sample preparation (washing process) and retain sample particles.
BagLight®: Bag without filter, for all microbiological laboratory applications....