Coulometric Reagents

Coulometry normally necessitates two reagent solutions, an anolyte and a catholyte. The anolyte is added to the anodic compartment and the catholyte to the cathodic compartment.
HYDRANAL^®-Coulomat A reagents are used as anolyte. Every anolyte contains iodide and a sulphur dioxide/imidazole buffer in a suitable solvent. HYDRANAL^®-Coulomat C reagents are used as catholytes.

Toxicity

HYDRANAL^®-Coulomat G-Types have been developed as anolyte as well as catholyte.
These reagents are:

• Pyridine free.
• Chloroform free.
• Carbon tetrachloride free.
• 2-methoxyethanol free.

HYDRANAL^®-Coulomat G reagents contain methanol as the only hazardous component. The non-toxic HYDRANAL^®-Coulomat E is mainly based on ethanol and does not wear the skull and crossbones on the label.

Stability

All reagents have a shelf life of at least five years, as long as the bottles remain unopened.

Advantages of the coulometric titration Easy to use. High accuracy. Suitable for the determination of 10 mg - 10 mg of water. Reagents available with and without halogenated hydrocarbons.

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Literature

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