Effect of filtration on the total alkalinity of open-ocean seawater

Effect of filtration on the total alkalinity of open-ocean seawater. and Millero F. J. Frank J. Chanson, M. Limnol. Oceanogr. Methods, Methods(5):293--295, 2007.

Paper doi abstract bibtex

Total alkalinity (TA) of filtered and unfiltered samples was measured during the P16N 2006 cruise in the Pacific Ocean and the I9N 2007 cruise in the Indian Ocean. Although filtering coastal water samples may be important to remove the contributions of phytoplankton and bacteria on the measured TA, it is not the case for open ocean samples. In this study, our results show that the at-sea measured total alkalinity of filtered and unfiltered samples were not statistically different. Measurements of 180 samples of surface, oxygen minimum, and deep waters in the Pacific and Indian oceans for unfiltered and filtered agreed to ±2 \$\mu\$mol kg–1. Therefore, the findings of this article show that it is not necessary to filter seawater samples when measuring total alkalinity in the open ocean.

@article{ chanson_effect_2007,
  title = {Effect of filtration on the total alkalinity of open-ocean seawater},
  volume = {Methods},
  issn = {1541-5856},
  shorttitle = {Effect of filtration on the total alkalinity of open-ocean seawater},
  url = {http://www.aslo.org/lomethods/locked/2007/0293.pdf http://www.aslo.org/lomethods/free/2007/0293.pdf},
  doi = {10.4319/lom.2007.5.293},
  abstract = {Total alkalinity ({TA}) of filtered and unfiltered samples was measured during the P16N 2006 cruise in the Pacific Ocean and the I9N 2007 cruise in the Indian Ocean. Although filtering coastal water samples may be important to remove the contributions of phytoplankton and bacteria on the measured {TA}, it is not the case for open ocean samples. In this study, our results show that the at-sea measured total alkalinity of filtered and unfiltered samples were not statistically different. Measurements of 180 samples of surface, oxygen minimum, and deep waters in the Pacific and Indian oceans for unfiltered and filtered agreed to ±2 \${\}mu\$mol kg–1. Therefore, the findings of this article show that it is not necessary to filter seawater samples when measuring total alkalinity in the open ocean.},
  number = {5},
  journal = {Limnol. Oceanogr. Methods},
  author = {Chanson, Mareva {and} Millero F. J. Frank J.},
  year = {2007},
  pages = {293--295}
}

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