Polyester sheets (about 0.2mm thick) can be more economically coated, since they can be manufactured in roll form. Other advantages are that polyester sheets are unbreakable, and they need less packing and less shelf space for storage.
Furthermore, they can be cut and eluted, etc. Small sheets, such as 8x4cm, can be economically manufactured and packed. The charring technique can be applied for silica coated POLYGRAM sheets, however at somewhat lower temperatures than on glass. The maximum temperature for POLYGRAM sheets is 160Â°C.
Silica 60, specific surface (BET) ~ 500 m2/g, mean pore size 60 Ã…, specific pore volume 0.75 mL/g, partcile size 5â€“17 Âµm; 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); special inorganic fluorescent pigment with blue fluorescence for long-wave UV (366 nm)
Binders: highly polymeric products, which are stable in almost all organic solvents and resistant towards aggressive visualisation reagents
The binder system for POLYGRAM sheets is also completely stable in purely aqueous eluents.
NANOCOLOR Potassium 50 (REF 985045) has been improved. The change is introduced from LOT 45004, which is available from stock as of 20th July 2020.
The test is now produced with an integrated ammonium compensation. The modified recipe allows a simple determination of potassium in the presence of an ammonium interference up to a concentration of 200 mg/L NH4-N, which is unique in the market.
The use of the additional ammonium compensation reagent (REF 918045) is therefore no longer necessary. Additional information on this topic will be part of our upcoming water news mailing.
Please note, that the test procedure has changed.
An update of the photometers is not required.
Please find the new product information within the following link.
Note: Please save your special methods and measurement data prior to the update. More information can be found in the customer information
For old photometers (PF-11 etc.) asking for blank guidance is available here.