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

@inproceedings{Hales2004HighfrequencyMO,
  title={High-frequency measurement of seawater chemistry: Flow-injection analysis of macronutrients},
  author={Burke Hales and Alexander van Geen and Taro Tsukuba-gun Takahashi},
  year={2004}
}
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… CONTINUE READING

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