Direct nesslerization of ammonia and nitrate in fresh-water
Copyright policy ) H. L. Golterman;
Direct nesslerization of ammonia and nitrate in fresh-water
A method for measuring NH3 colorimetrically by Nessierization without distillation is proposed. Precipitation of CaC03 is prevented by adding Na salicylate, which chelates the Ca2+, but not the Hg2+ of Nessler's reagent. NO3can be measured in the same way after reduction with TiClj. Precision and accuracy are those of a colorimetric method ; the sensitivity is somewhat lower than with the indophenol-blue method using phenol, but about the same as when using salicylate.
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These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
Citations provided by BIP!popularityPopularity provided by BIP!
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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