For semi-quantitative determinations.

For determination of pH- value.
Plastic dispensing reel with 1 roll of indicator paper and colour scale.

For determination of pH-value.
Roll length 5m, 10mm width. With three colour zones, without hydrophobic zone.
Plastic container with 1 roll of indicator paper and colour scale.

Support materials for TLC ready-to-use layers

Glass plates: glass, ~ 1.3 mm thick, high requirements for weight, packaging and storage, ideal torsional strength, high temperature stability, susceptible to breakage, can not be cut with scissors, high resistance against solvents, mineral acids and conc. ammonia, suitability for aqueous detection reagents depends on the phase

POLYGRAM^®: polyester, ~ 0.2 mm thick, low requirements for weight, packaging and storage, low torsional strength, max. 185 °C temperature stability, not susceptible to breakage, can be cut with scissors, high resistance against solvents, mineral acids and conc. ammonia, very suitable for aqueous detection reagents

ALUGRAM^®: aluminium, ~ 0.15 mm thick, low requirements for weight, packaging and storage, relatively high torsional strength, high temperature stability, not susceptible to breakage, can be cut with scissors, high resistance against solvents, low resistance against mineral acids and conc. ammonia, limited suitability for aqueous detection reagents
Glass plates, POLYGRAM^®, ALUGRAM^®

• Silica 60
• Specific surface (BET) ~500 m²/g
• Mean pore size 60 Å
• Specific pore volume 0.75 ml/g
• Particle size 5 to 17 µm
• Standard grade
• Thickness of layer for analytical plates 0.25 mm, for preparative plates 0.5 and 1 mm
• For 2 mm preparative layers a slightly coarser material is used, indicators: manganese activated zinc silicate with green fluorescence for short-wave UV (254 nm)
• Binders: highly polymeric products, which are stable in almost all organic solvents and resistant towards aggressive visualisation reagents
• Binder system for Polygram^® sheets is also completely stable in purely aqueous eluents
• Available as glass plates, Polygram polyester sheets and Alugram aluminium sheets
• Available with or without fluorescent indicator (UV 254)

For determining water hardness.
Colour change from green to red.

Medium fast filtration, smooth.
For fat determinations, free from fats and resins. Ether soluble residue <0.1 mg for diam. 270 mm filters.

Medium filtration, smooth.

Screw neck vials for storage of liquid samples.

• Wide opening
• Short thread
• Flat bottom

Pack of 100 pieces.
Other sizes and weighing aids available on request.

Snap ring / crimp neck vials N11 may be sealed either with a snap ring closure N11 or a crimp closure N11.

The syringe filters are used for filtration of suspended matter from liquid samples and are certified for HPLC. Standard CHROMAFIL syringe filters are color coded. CHROMAFIL Xtra syringe filters are labeled for method validation and certification. All CHROMAFIL syringe filters are autoclavable (121 °C and 1.1 bar for 30 min).
Hydrophilic membrane, for aqueous solutions, water-soluble oligomers and polymers like proteins binding capacity for proteins 20 µg/25 mm filter.

Fast filtration, smooth, ashless.

The syringe filters are used for filtration of suspended matter from liquid samples and are certified for HPLC. Standard CHROMAFIL syringe filters are color coded. CHROMAFIL Xtra syringe filters are labeled for method validation and certification. All CHROMAFIL syringe filters are autoclavable (121 °C and 1.1 bar for 30 min).
A hydrophobic membrane. Ideal for filtration of non-polar liquids and gases. It is very resistant to various solvents as well as acids and bases. By flushing with alcohol, followed by water, the original hydrophobic membrane can be made more hydrophilic.

Medium speed, smooth.

The syringe filters are used for filtration of suspended matter from liquid samples and are certified for HPLC. Standard CHROMAFIL syringe filters are color coded. CHROMAFIL Xtra syringe filters are labeled for method validation and certification. All CHROMAFIL syringe filters are autoclavable (121 °C and 1.1 bar for 30 min).
Hydrophilic membrane with very low adsorption for aqueous and organic/aqueous liquids i.e. polar and medium polar sample solutions. Binding capacity for proteins 84µg/25mm filter.

Transparent, smooth. 40 g/m² paper
Block of 100 sheets.

Further weighing aids available on request.

Combination phase for SPE of hydrocarbons from water acc. to DIN H53 / ISO DIS 9377-4

Special combination phase of sodium sulphate and Florisil^®.

Recommended application: hydrocarbons from drinking, surface and waste waters.

Can be used up to a maximum of 200 °C. With organic binder.

Hydrophilic membrane for filtration of water-soluble oligomers and polymers, especially suited for biological macromolecules. Very high shape stability in aqueous solutions extremely low binding capacity for proteins (21µg/ 25mm filter).

Hydrophilic membrane for polar as well as non-polar solvents. The HPLC filter, especially suited for mixtures of water and organic solvents; for TOC/DOC determination; not cytotoxic, does not inhibit the growth of microorganisms and higher cells. Polyester filter with integrated glass fibre prefilter (GF/PET): recommended for solutions with a high load of particulate matter or for highly viscous solutions.

Acid washed, calcined. Pack of 1000 g.

Roll length 5 m, 10 mm width. With two colour zones. Plastic box with 1 roll of indicator paper and colour scale. Duotest indicator papers combine two different indicator zones on a single strip. The zones are separated by a hydrophobic barrier, which effectively prevents mixing of the reaction colors, simplifying and precisely assigning the pH value.

The syringe filters are used for filtration of suspended matter from liquid samples and are certified for HPLC. Standard CHROMAFIL syringe filters are color coded. CHROMAFIL Xtra syringe filters are labeled for method validation and certification. All CHROMAFIL syringe filters are autoclavable (121 °C and 1.1 bar for 30 min).
Hydrophilic membrane for aqueous and light organic solutions. Very low adsorption of pharmaceuticals and proteins. Good stability against acids and bases. Binding capacity for proteins 29 µg per 25 mm filter.