The measurement of reactive silicate in saline-hypersaline lakes: examples of the problem |
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| Authors: | JK Toxey DA Meese KA Welch WB Lyons |
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| Institution: | (1) Department of Geology, University of Alabama, 35487-0338 Tuscaloosa, AL, USA;(2) U.S. Army Cold Regions Research and Engineering Laboratory, 03755 Hanover, NH, USA;(3) Present address: Department of Geosciences, University of Arizona, 85721 Tucson, AZ, USA |
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| Abstract: | The analysis of reactive silicate or H4SiO4 in saline lake waters using the silicomolybdic acid method developed by Mullin and Riley (1955) suffers from a rather severe
salt interference. Our data show that the interference occurs in waters where both chloride and sulfate are the major anions.
The interference leads to lower than actual values (by as much as 50 per cent). Until the chemical mechanism of the interference
is quantitatively understood, dilution with deionized water appears to be the best approach to obtaining reliable data. This
may limit the technique's usage in waters of high TDS, and low reactive silicate. |
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| Keywords: | brine nutrients silicate |
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