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Chemical Stability of the Brinkmann Bottletop Dispenser ,,, and the Brinkmann Bottletop Buret

Chemical Stability of the Brinkmann Bottletop Dispenser and the Brinkmann Bottletop Buret

Bottletop dispensers are used in the lab for dispensing a wide range of different solvents from glass or stainless steel containers. These dispensers have to meet various requirements. For example, they must not give off any substances which may disturb trace analysis, have cytotoxic properties, distort optical tests or influence chromatographic methods and residue analysis.

Even after prolonged contact with the solvent, the materials of the dispenser must not be affected nor bind the solvent non-specifically. This means that there are very high demands on the chemical resistance of bottletop dispensers.

The Brinkmann Bottletop Dispenser and Brinkmann ChemSaver Bottletop Dispenser are made of material which is particularly resistant to chemicals. Only parts made of PFA (perfluor alkoxy), PTFE (polytetrafluor ethylene), boron silicate glass 3.3 and platinum / iridium come into contact with the solvents. The adapter rings for the screw connection are made of PP (polypropylene).

The following pages include an example on the use of a Bottletop Dispenser for residue analysis in the lab of a food manufacturer as well as a list of the materials of which the Bottletop Dispenser is made and their chemical resistence.

Dispensing ultrapure solvents for residue analysis at the Hipp plant in Pfaffenhofen, Germany

The residue analysis of foodstuffs places high demands on the solvents and the inertness of the lab equipment used to detect, for example, even the smallest traces of pesticides.

Therefore, contamination caused by lab equipme
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