Abstract
To study nutrient dynamics and cycling in oligotrophic open ocean environments, continuous measurements of nanomolar nitrate, nitrite, and phosphate are valuable. However, such studies are usually impeded by the detection limits of conventional nutrient-sensors and analyzers. Here, we developed a shipboard deployable underway system for simultaneously monitoring nitrate plus nitrite and phosphate at nanomolar concentrations by the coupling of an optimized flow injection analytical system with two long-path liquid waveguide capillary cells (LWCC). The detection limits are ∼2 nM for nitrate plus nitrite and ∼1.5 nM for phosphate, respectively. Results from realtime surveys of waters over the west Florida continental shelf and the oligotrophic Sargasso Sea are presented. This system has also been successfully used to analyze more than 1000 discrete seawater samples manually during 2 cruises in the North Atlantic.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 319-326 |
| Number of pages | 8 |
| Journal | Limnology and Oceanography: Methods |
| Volume | 6 |
| Issue number | JUL |
| State | Published - Jul 2008 |
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ASJC Scopus subject areas
- Ocean Engineering
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Underway monitoring of nanomolar nitrate plus nitrite and phosphate in oligotrophic seawater. / Li, Qian P.; Hansell, Dennis A; Zhang, Jia Zhong.
In: Limnology and Oceanography: Methods, Vol. 6, No. JUL, 07.2008, p. 319-326.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Underway monitoring of nanomolar nitrate plus nitrite and phosphate in oligotrophic seawater
AU - Li, Qian P.
AU - Hansell, Dennis A
AU - Zhang, Jia Zhong
PY - 2008/7
Y1 - 2008/7
N2 - To study nutrient dynamics and cycling in oligotrophic open ocean environments, continuous measurements of nanomolar nitrate, nitrite, and phosphate are valuable. However, such studies are usually impeded by the detection limits of conventional nutrient-sensors and analyzers. Here, we developed a shipboard deployable underway system for simultaneously monitoring nitrate plus nitrite and phosphate at nanomolar concentrations by the coupling of an optimized flow injection analytical system with two long-path liquid waveguide capillary cells (LWCC). The detection limits are ∼2 nM for nitrate plus nitrite and ∼1.5 nM for phosphate, respectively. Results from realtime surveys of waters over the west Florida continental shelf and the oligotrophic Sargasso Sea are presented. This system has also been successfully used to analyze more than 1000 discrete seawater samples manually during 2 cruises in the North Atlantic.
AB - To study nutrient dynamics and cycling in oligotrophic open ocean environments, continuous measurements of nanomolar nitrate, nitrite, and phosphate are valuable. However, such studies are usually impeded by the detection limits of conventional nutrient-sensors and analyzers. Here, we developed a shipboard deployable underway system for simultaneously monitoring nitrate plus nitrite and phosphate at nanomolar concentrations by the coupling of an optimized flow injection analytical system with two long-path liquid waveguide capillary cells (LWCC). The detection limits are ∼2 nM for nitrate plus nitrite and ∼1.5 nM for phosphate, respectively. Results from realtime surveys of waters over the west Florida continental shelf and the oligotrophic Sargasso Sea are presented. This system has also been successfully used to analyze more than 1000 discrete seawater samples manually during 2 cruises in the North Atlantic.
UR - http://www.scopus.com/inward/record.url?scp=49249138809&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=49249138809&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:49249138809
VL - 6
SP - 319
EP - 326
JO - Limnology and Oceanography: Methods
JF - Limnology and Oceanography: Methods
SN - 1541-5856
IS - JUL
ER -