This application note provides a complete solution to determine urea in fertilizers employing METTLER TOLEDO's thermometric titrator. Non aqueous titration of urea samples are performed to ensure optimal acidity when dissolved in soil using a METTLER TOLEDO thermometric titrator, which is automated with an InMotion™ Autosampler.
Method of Analysis
A sample is titrated against perchloric acid after evaluating titer and blank values as per the method mentioned in the application note, M851. Iso-butylvinyl ether used as an indicator signifies a sudden inflation in temperature on reaching the end point.
Procedure
The standard urea and the fertilizer sample solutions were prepared in glacial acetic acid. On titration against perchloric acid, the plot of sample temperature (ordinate) versus volume of titrant added (abscissa) provides the equivalence point.
This Application Note Includes
- Introduction
- Sample preparation and procedures
- Solutions and chemicals
- Chemistry
- Instruments and accessories
- Method in detail
- Results and remarks
And method files (.lmt and .xml) for direct import and implementation on the instrument.
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