Article

 

High-frequency measurement of seawater chemistry: Flow-injection analysis of macronutrients Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/0g354m061

Descriptions

Attribute NameValues
Creator
Abstract
  • We adapted a commercially available flow‐injection autoanalyzer (Lachat Quik‐Chem 8000) to measure seawater nitrate concentrations at a rate of nearly 0.1 Hz and phosphate and silicate concentrations at a rate half that. Several minor improvements, including reduced sample‐loop size, high sample flushing rate, modified carrier chemistry, and use of peak height rather than peak area as a proxy for nutrient concentration aided in the increase in sampling rate. The most significant improvement, however, was the construction of a copperized cadmium NO3− reduction column that had a high surface area to volume ratio and a stable packing geometry. Preliminary results from a cruise in the Ross Sea in austral spring of 1997 are shown. Precision of all three analyses is better than 1%. Comparison of the nutrient concentrations determined by the rapid analysis method described here with traditional discrete analyses shows that nitrate and silicate determined by the two approaches are within a few percent of each other, but that the phosphate concentrations determined by the rapid analysis are as much as 10% lower than those determined by the discrete analyses.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Hales, B., van Geen, A., & Takahashi, T. (2004). High-frequency measurement of seawater chemistry: Flow-injection analysis of macronutrients [Electronic version]. Limnology and Oceanography: Methods, 2, 91-101.
Journal Title
Journal Volume
  • 2
Journal Issue/Number
  • 3
Academic Affiliation
Keyword
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2010-07-10T00:06:44Z (GMT). No. of bitstreams: 1 Hales_et_al_Limnol_Oceanogr_Methods_2004_Flow-Injection.pdf: 1198407 bytes, checksum: 605d95836ce8fc49f6a840c910f783bd (MD5) Previous issue date: 2004-03
  • description.provenance : Submitted by David Moynihan (dmscanner@gmail.com) on 2010-07-08T19:52:46Z No. of bitstreams: 1 Hales_et_al_Limnol_Oceanogr_Methods_2004_Flow-Injection.pdf: 1198407 bytes, checksum: 605d95836ce8fc49f6a840c910f783bd (MD5)
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2010-07-10T00:06:44Z (GMT) No. of bitstreams: 1 Hales_et_al_Limnol_Oceanogr_Methods_2004_Flow-Injection.pdf: 1198407 bytes, checksum: 605d95836ce8fc49f6a840c910f783bd (MD5)

Relationships

Parents:

This work has no parents.

Items