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Use of Voltammetry to Monitor O 2 Using Au/Hg Electrodes and to Control Physical Sensors on an Unattended Observatory in the Delaware Bay
Author(s) -
Moore Tommy S.,
Nuzzio Donald B.,
Deering Timothy W.,
Taillefert Martial,
Luther George W.
Publication year - 2007
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200703926
Subject(s) - mooring , observatory , bay , environmental science , oxygen , seawater , oceanography , chemistry , geology , physics , organic chemistry , astrophysics
A voltammetric analyzer was used to control an observatory mooring in the Delaware Bay at the same time oxygen data were collected with solid‐state gold‐amalgam (Au/Hg) electrodes. Oxygen, temperature and salinity data were collected for 8 days and sent wirelessly back to the shore‐based laboratory. Observed oxygen saturations ranged from 70 to 171%, with a mean of 107%. The highest oxygen concentrations were observed when there were low tides during the solar maximum, indicating higher rates of production within the Delaware Bay than in coastal Atlantic Ocean waters which passed the mooring at high tides, as expected based on previous shipboard studies. Lower percent saturations indicated respiration, the decomposition of organic matter by oxygen, as the dominant process and corresponded to night periods. Upon recovery the electrodes were free of bio‐fouling. This study demonstrates that voltammetric techniques and equipment can be used in observatory and mooring systems.