This application note describes the thermometric determination of the titer of ethylenediamine-tetraacetic acid (EDTA) and of the blank value using magnesium chloride (MgCl2) as the primary standard.
Background
The chelating agent, ethylenediaminetetraacetic acid (EDTA), has applications in various segments, such as analytical chemistry, industry, medicine and cosmetics etc. Its capability of complexing different kind of metal ions makes him the substance of choice to dissolve limescale, to reduce the water hardness or to treat heavy metal poisoning. In analytical chemistry, EDTA is used as titrants in the analysis of calcium, magnesium, zinc and other metal ions. It is also used to mask metal ions during the analysis of other substances.
The change in heat of formation of the metal-EDTA complex is large enough to be followed by thermometric titration. The titer and blank value are determined usingan InMotion™ autosampler and a Thermotrode™.
This application note includes:
- General introduction
- Sample preparation and procedures
- Solutions and chemicals
- Chemistry
- Instruments and accessories
- Method in detail
- Results and remarks
Along with method files (.lmt and .xml) for direct import and implementation on the instrument.
