Advantage of Analysis
The popularity of the Karl Fischer titration is due in large part to several practical advantages that it holds over other methods of moisture determination, including:
- High accuracy and precision
- Selectivity for water
- Small sample quantities required
- Easy sample preparation
- Short analysis duration
- Nearly unlimited measuring range (1ppm to 100%)
- Suitability for analyzing:
- Solids
- Liquids
- Gases
- Independence of presence of other volatiles
- Suitability for automation
In contrast, loss on drying will detect the loss of any volatile substance.
The major disadvantage is that the water has to be accessible and easily brought into methanol solution. Many common substances, especially foods such as chocolate, release water slowly and with difficulty, and require additional efforts to reliably bring the total water content into contact with the Karl Fischer reagents.
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