Method Abstract #106, Chloride by Direct Measure

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Chloride by Direct Measure

Method Abstract #106

Scope and Application

This method determines the chloride concentration of water samples. This method is a variation of ASTM D 512 (C)

Method Summary

This method involves the addition of an ionic strength adjuster (NaNO3) to samples which helps keep the background ionic strength high and stable in relation to the varying chloride concentrations.  The concentration is then measured directly with a chloride ion selective electrode.

Sample Titration Curve

Method Performance

*Data for this measuring range was obtained using laboratory prepared standards formulated from potassium chloride.  The measuring range may be increased by using 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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