Volumetric Titration with one-component reagents

Advantages of one-component titration:

• Determination of unlimited range of water content
• Convenient and easy to use
• Long shelf life

Product range HYDRANAL^® volumetric one-component reagents


Composition
HYDRANAL^®-Composite is a one-component Karl Fischer reagent for volumetric Karl Fischer titration. It contains all reactants: iodine, sulfur dioxide and the bases imidazole and 2-methylimidazole, dissolved in diethyleneglycol monoethyl ether (DEGEE). Using 2-methylimidazole in addition to imidazole improves the stability and eliminates the formation of crystals, which can interfere with the performance of the titrator. We have applied for a patent for this new formulation.


Stability
HYDRANAL^®-Composite is stabilized with DEGEE instead of 2-methoxyethanol. DEGEE improves stability; the concentration loss is less than 5 % per year.


Toxicity
HYDRANAL^®-Composites are free of pyridine and 2-methoxyethanol. DEGEE is non-hazardous unlike 2-methoxyethanol, which is fetotoxic and teratogenic (see ECETOC Technical Report No 17).


Using HYDRANAL^®-Composite
We recommend the following procedure for titrations with HYDRANAL^®-Composite (Figure 2.1):

1. Fill the burette with HYDRANAL^®-Composite
2. Add HYDRANAL^®-Methanol dry or HYDRANAL^®-Methanol Rapid or HYDRANAL^®-CompoSolver E to the titration vessel
3. Titrate to dryness with HYDRANAL^®-Composite
4. Add sample
5. Titrate the water content with HYDRANAL^®-Composite

Figure 2.1: Volumetric one-component titration with HYDRANAL®-Composite.

• Volumetric titration using two-component reagents
• Coulometric titration

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