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Chloride In Saturated Paste Extract - Flow Injection Analyzer Method

Saturated Paste Extract: Cl

Summary

This method quantifies the amount of chloridein a soil water extract, such as from the saturated paste extract using flow injection analysis. Thiocyanate ions are liberated from mercuric thiocyanate in the presence of chloride with the formation of mercuric chloride. In the presence of ferric ion, free thiocyanate ions form highly colored ferric thiocyanate. The absorbance of ferric thiocyanate is measured at 480 nm and is proportional to the chloride concentration.  The method has a detection limit of 0.1 meq/L.

Pruefer, A.  2007. Determination of Chloride by Flow Injection Analysis Colorimetry. QuikChem Method 10-117-07-1-B.  Lachat Instruments, Milwaukee, WI.

Diamond, D. 2001. Determination of Chloride by Flow Injection Analysis Colorimetry. QuikChem Method 10-117-07-1-H. Lachat Instruments, Milwaukee, WI.

Rhoades, J. D. 1982. Soluble salts. p. 167-179. In: A. L. Page et al. (ed.) Methods of soil analysis: Part 2: Chemical and microbiological properties. Monograph Number 9 (Second Edition). ASA, Madison, WI.