Volumetric Karl Fischer titration for noodles

The water content of pasta (noodles, spaghetti, etc) can be determined by volumetric Karl Fischer titration.

The water content of pasta (noodles, spaghetti, etc) can be determined by volumetric Karl Fischer titration.

Pasta with a low water content of about 10% can be stored for many years.

Pasta containing much more than 12% of moisture has a considerably shortened shelf life as it can become musty and mouldy.

Prior to analysis the pasta is ground up as finely as possible in a cooled laboratory mill.

As the sample could heat up during grinding (resulting in water loss), cooling is crucial for obtaining correct results.

Extraction of the water from the powdery sample is accelerated by adding formamide and working at 50 C.

This considerably shortens the time required for the Karl Fischer titration.

Analytical System from Metrohm for the water determination :- 841 Titrando 2.841.0010 803 KF Titration Stand 2.803.0010 800 Dosino 2.800.0010 Dosing Unit 10 mL 6.3032.210 Titration vessel 50_150 mL with thermostat jacket 6.1418.250 The 841 Titrando has the sophisticated control algorithm of the Titrando which has been adapted to the characteristics of the Karl Fischer reaction and guarantees highly precise results.

You can choose between a polarized alternating current (Ipol) or a defined voltage (Upol) to be applied to the electrode.

Both working modes yield fast and precise results.

Different reagents require different parameters.

The 841 Titrando lets you select the appropriate method for each type of reagent.

Combined with the easy and intuitive user guidance this is the optimal instrument for routine operation e.g the KF icons show you at a glance whether the instrument is still busy conditioning or whether you can start the water determination.

The electrode test and the newly created parameter safety stop prevent cell run-over during conditioning.

If, for example, the electrode is not connected correctly or the titration cell is very humid, conditioning is stopped after a given time or a given volume of KF reagent added.

This new feature increases work safety in your laboratory.

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