Thermometry enables direct sodium titration in foodstuffs

Argentometric titration of chloride is commonly used to quantify sodium in foodstuffs. This approach assumes that all sodium ions in the sample come from sodium chloride. However, sodium can also come from other sources, such as monosodium glutamate. Assuming that the chloride content is directly linked to the sodium content can therefore lead to inaccurate results. Direct titration of sodium using thermometric endpoint detection solves this issue.

Metrohm's OMNIS Titrator can be equipped for such thermometric titrations. The OMNIS platform supports parallel titration and can be easily expanded for fully automated analyses.

The titration itself only requires minimal sample preparation. This sample preparation includes thorough homogenisation of the sample and complete release of sodium from the matrix are necessary. Accurate results are then obtained in less than two minutes. 

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