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A potential tool for high-resolution monitoring of ocean acidification
Swedish Meteorological and Hydrological Institute, Sweden; University of Gothenburg, Sweden.
University of Gothenburg, Sweden.
RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Kemi.ORCID-id: 0000-0001-6496-0586
University of Gothenburg, Sweden.
Vise andre og tillknytning
2013 (engelsk)Inngår i: Analytica Chimica Acta, ISSN 0003-2670, E-ISSN 1873-4324, Vol. 786, nr Jul, s. 1-7Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Current anthropogenic carbon dioxide emissions generate besides global warming unprecedented acidification rates of the oceans. Recent evidence indicates the possibility that ocean acidification and low oceanic pH may be a major reason for several mass extinctions in the past. However, a major bottleneck for research on ocean acidification is long-term monitoring and the collection of consistent high-resolution pH measurements. This study presents a low-power (<1 W) small sample volume (25 μL) semiconductor based fluorescence method for real-time ship-board pH measurements at high temporal and spatial resolution (approximately 15. s and 100. m between samples). A 405. nm light emitting diode and the blue and green channels from a digital camera was used for swift detection of fluorescence from the pH sensitive dye 6,8-Dihydroxypyrene-1,3-disulfonic acid in real-time. Main principles were demonstrated by automated continuous measurements of pH in the surface water across the Baltic Sea and the Kattegat region with a large range in salinity (~3-30) and temperature (~0-25 °C). Ship-board precision of salinity and temperature adjusted pH measurements were estimated as low as 0.0001 pH units.

sted, utgiver, år, opplag, sider
2013. Vol. 786, nr Jul, s. 1-7
Emneord [en]
6, 8-Dihydroxypyrene-1, 3-disulfonic acid, Fluorescence, High-flow/low-flow sampling, Non-linear calibrations, Ocean acidification, PH monitoring
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-6578DOI: 10.1016/j.aca.2013.04.040Scopus ID: 2-s2.0-84879303145Lokal ID: 23874OAI: oai:DiVA.org:ri-6578DiVA, id: diva2:964417
Tilgjengelig fra: 2016-09-08 Laget: 2016-09-08 Sist oppdatert: 2020-12-01bibliografisk kontrollert

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