Calcium, Magnesium, and Total Hardness by Potentiometric Titration Using Ammonium Hydroxide Buffer
Method Abstract #115
Scope and Application
This method is useful for monitoring the calcium, magnesium and total hardness in water samples. It is a variation of Standard Method 2340 C and ASTM D 1126.
Sample Titration Curve
Method Performance
*Data for this measuring range was obtained using laboratory prepared standards formulated from calcium carbonate. The measuring range may be increased by using larger capacity analysis vessels and/or auto dilution.
**The Method Detection Limit (MDL) was determined based on data obtaining a coefficient of variance better than 30%. Results may differ depending on laboratory practices and sample matrix.
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