Environmental Electrochemistry: Analyses of Trace Element by Martial Taillefert, Rozan

By Martial Taillefert, Rozan

This ebook examines the usefulness of electrochemical tools for knowing advanced average biogeochemical techniques. It describes ideas constructed to degree hint metals, redox species, and significant ions in clean- and marine waters, hydrothermal vents, sediments, microbial mats, extraterrestrial structures, and at mineral-water interfaces. it will likely be of use to scientists and researchers who have to describe biogeochemical biking of hint components in traditional environments.

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2 The electrochemical package was first tested in cold waters away from high temperature vents and high flow rates. Thus, no significant change in signal could be expected. Figure 2 shows five LSV scans of 0 in ambient 2 °C seawater near the vent site at 2500 meter water depth. The electrochemical analyzer and electrode package shows excellent reproducibility. 3 μΜ consistent with previous results (19). 5 meter above a vent orifice where the temperature was 25°C. At the orifice the temperature was 360 °C as measured by a second thermocouple without electrodes attached.

ACS Symposium Series; American Chemical Society: Washington, DC, 2002. 50 Conclusions Real time, in situ measurements in oceanic hydrothermal vent environments were accomplished with a submersible electrochemical analyzer and PEEK™ Au/Hg electrodes for dissolved 0 , Fe , FeS , free H S and total sulfide ( S v s ZFeS + H S). The electrochemical instrumentation is robust to work in extreme environments and is commercially available. The electrodes are designed to operate at temperatures up to 150 °C.

1999, 40, 74-79. 13. ; Buffle, J. Env. Sci. Tech. 2000, 34, 4018-4024. 14. ;Koudelka-Hep, M . Anal. Chem. (in press). 15. ; Buffle, J. Electroanalysis. 1995, 7, 55-63. 16. ; Koudelka-Hep, M . Anal. Chim. Acta. 1996, 329, 203-214. 17. -L. ; Buffle, J. Anal. Chem. 1996, 68, 3670-3678. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2002. 39 18. ; Koudelka-Hep, M . Anal. Chem. 1998, 70, 2949-2956. 19. ; Zhang, H. ; IUPAC Series of Analytical and Physical Chemistry of Environmental Systems; John Wiley & Sons: Chichester, 2000, Vol.

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