Anion chromatography, a form of ion chromatography, is specifically used for the separation and subsequent analysis of anions in samples.
The separation mechanism in anion chromatography is based on the varying strengths of interactions with a fixed column material. This consists of a material that contains positively charged groups that attract and bind anions through ionic interactions. An aqueous solution (eluent) with a certain ion concentration and pH value is used to transport the anions through the column. Depending on the type of anion, it leaves the column sooner or later than others and is quantified in a conductivity detector.
Typical fields of application of ion chromatography include:
- Water analysis: quality assurance of drinking water, ultrapure water, composition of waste water, etc.
- Surface analysis: Determination of soluble contaminants on surfaces
- Corrosion products: Detection of active corrosion species such as chlorides, nitrates, etc.
