dc.contributor.author | Langdon, C | |
dc.date.accessioned | 2017-11-24T20:21:13Z | |
dc.date.available | 2017-11-24T20:21:13Z | |
dc.date.issued | 2010 | |
dc.identifier.citation | Langdon, C. (2010) Determination of Dissolved Oxygen in Seaweater By Winkler Titration using Amperometric Technique. In, The GO-SHIP Repeat Hydrography Manual: A Collection of Expert Reports and Guidelines. Version 1, (eds Hood, E.M., C.L. Sabine, and B.M. Sloyan). 18pp.. (IOCCP Report Number 14; ICPO Publication Series Number 134). DOI: https://doi.org/10.25607/OBP-1350 | en_US |
dc.identifier.uri | http://hdl.handle.net/11329/380 | |
dc.identifier.uri | https://doi.org/10.25607/OBP-1350 | |
dc.description.abstract | This paper describes procedures to be used for the determination of dissolved oxygen in discrete
samples of seawater. These procedures are based on the modified Winkler titration method
(Carpenter 1965). These modifications reduced the loss of I2
during the titration due to volatilization by optimizing the concentrations of the “pickling” reagents to encourage the formation of the more stable triiodide complex I3-
and by adopting the whole-bottle titration method which eliminates the loss of I
2
during transfer of sample aliquots. This
procedure is suitable for the measurement of the
full range of oceanic oxygen c
oncentrations (0-400 μmol kg
-1
) in uncontaminated seawater. The
typical precision that can be achi
eved using automated amperometric
endpoint detection systems is
±0.15 μmol kg
-1
.
Carpenter (1965) established the accuracy of the method as <0.1% or ±0.3 μmol
kg
-1
.
This procedure is unsuitable for seaw
ater containing hydrogen sulfide (H
2
S). In oxygen-
deficient regions (<5 μmol kg
-1
) a high concentration of nitrite (NO
2
-
) may cause a positive oxygen
bias. Polluted waters may contain reducing sub
stances that will react with the liberated I
2
resulting in
a negative oxygen bias | en_US |
dc.language.iso | en | en_US |
dc.relation.ispartofseries | ICPO Publication Series;134 | |
dc.relation.ispartofseries | IOCCP Report;14 | |
dc.rights | CC0 1.0 Universal | * |
dc.rights.uri | http://creativecommons.org/publicdomain/zero/1.0/ | * |
dc.subject.other | GO-SHIP | |
dc.title | Determination of Dissolved Oxygen in Seawater by Winkler Titration Using The Amperometric Technique. | en_US |
dc.type | Report Section | en_US |
dc.description.status | Published | en_US |
dc.description.refereed | Refereed | en_US |
dc.format.pagerange | 18pp. | en_US |
dc.subject.parameterDiscipline | Parameter Discipline::Chemical oceanography | en_US |
dc.subject.dmProcesses | Data Management Practices::Data acquisition | en_US |
dc.description.currentstatus | Current | en_US |
dc.contributor.editorparent | Hood, E.M. | |
dc.contributor.editorparent | Sabine, C.L. | |
dc.contributor.editorparent | Sloyan, B.M. | |
dc.title.parent | The GO-SHIP Repeat Hydrography Manual: A Collection of Expert Reports and Guidelines. Version 1. | en_US |
obps.resourceurl.publisher | http://www.go-ship.org/HydroMan.html | en_US |