Nitrogen dynamics regulating

Hobbie S. E. and Chapin F. S., Ill (1996) Winter regulation of tundra litter carbon and nitrogen dynamics. Biogeochemistry 35, 327-338. 

Similarly to N, most S pools are found in organic form in forest floor and soil humus. However, unlike nitrogen, there are important abiotic processes, especially sulfate sorption processes, which play a critical role in regulating sulfate dynamics in forest ecosystems. An example of this type of exposure pathway was shown in the Habbard Brook whole-tree harvesting experiment, where the decrease in sulfate output from the watershed was attributed to sulfate adsorption, which was enhanced by soil acidification from nitrification (see above). 

The ECD is well suited as a selective detector for compounds with high electron affinity and limited linear response (dynamic range 104 with nitrogen). ECD detection is mainly used for analyses of chlorine-containing pesticides. Because of the presence of a radioactive source in this detector, it is subject to special regulations (e.g. inspections location and maintenance visits). 

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