Measuring the Citric Acid Concentration Using an Anton Paar Refractometer

Citric acid is mainly used as acidulating agent, preservative, and as a flavoring (E330) in the beverage and food industries. The quality and/or concentration of citric acid can be measured or verified by using an Anton Paar Abbemat refractometer.

1 Industrial Areas

Citric acid (2-Hydroxypropane-1,2,3-tricarboxylic acid) is a weak organic acid with the chemical formula C6H8O7. It naturally occurs in citrus fruits. For industrial purposes over one million tons per year are biotechnologically produced with mold (e.g. Aspergillus niger).

Citric acid is not only used in the beverage industry, but also in the production of detergents, soaps, food, pharmaceuticals, cosmetics, and for other industrial uses.

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