Organic acids are organic compounds that possess acidic properties. They do not fully dissolve in water, which makes them weak acids. Various industries use organic acids for corrosion treatment and prevention because they are minimally reactive to mineral acids. Juice and wine industries use organic acids to enhance flavor, color, and aroma, as well as for stability and microbiological control.
Many organic acids lack sufficient sensitivity for detection. In addition, other components commonly present in these types of samples have a high UV absorption, which can interfere with the detection of target analytes. Most carboxylic acids ionize sufficiently, making ion chromatography with suppressed conductivity detection the technique of choice to separate a large variety of organic acids with inorganic anions and detect them with high sensitivity while minimizing the sugar interferences.
Some organic acids are more highly regulated than others. See below for examples from various regulatory bodies.
|Application Notes||Sample||MDL||IC Column|
|Determination of Organic Acids in Fruit Juices and Wines by High-Pressure IC (AN 1068)||Fruit juice, wine||0.036–0.069mg/L||Dionex IonPac AS-11-HC Columns|
|Determination of Tartaric Acid in Tolterodine Tartrate Drug Products by IC with Suppressed Conductivity Detection (AN 1002)||Tolterodine tartrate||n/a||Dionex IonPac AS20 Columns|
|Determination of Organic Acids in Wastewater Using Ion-Exclusion Chromatography and On-Line Carbonate Removal (AN 291)||Wastewater||n/a||Dionex IonPac ICE-AS1 Columns|
|Determination of Oxalate and Other Anions in Bayer Liquor Using Ion Chromatography (AN 206)||Bayer liquor||n/a||Dionex IonPac AS17 Columns|
|Citric acid determination in mixed beer beverages||Citric acid||n/a||n/a|