دورية أكاديمية
In situ spectrophotometric measurement of dissolved inorganic carbon in seawater.
| العنوان: | In situ spectrophotometric measurement of dissolved inorganic carbon in seawater. |
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| المؤلفون: | Liu X; College of Marine Science, University of South Florida , 140 7th Avenue S., St. Petersburg, Florida 33701, United States., Byrne RH, Adornato L, Yates KK, Kaltenbacher E, Ding X, Yang B |
| المصدر: | Environmental science & technology [Environ Sci Technol] 2013 Oct 01; Vol. 47 (19), pp. 11106-14. Date of Electronic Publication: 2013 Sep 17. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 0213155 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5851 (Electronic) Linking ISSN: 0013936X NLM ISO Abbreviation: Environ Sci Technol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Washington DC : American Chemical Society Original Publication: Easton, Pa. : American Chemical Society, c1967- |
| مواضيع طبية MeSH: | Carbon/*analysis , Seawater/*analysis, Florida ; Spectrophotometry |
| مستخلص: | Autonomous in situ sensors are needed to document the effects of today's rapid ocean uptake of atmospheric carbon dioxide (e.g., ocean acidification). General environmental conditions (e.g., biofouling, turbidity) and carbon-specific conditions (e.g., wide diel variations) present significant challenges to acquiring long-term measurements of dissolved inorganic carbon (DIC) with satisfactory accuracy and resolution. SEAS-DIC is a new in situ instrument designed to provide calibrated, high-frequency, long-term measurements of DIC in marine and fresh waters. Sample water is first acidified to convert all DIC to carbon dioxide (CO2). The sample and a known reagent solution are then equilibrated across a gas-permeable membrane. Spectrophotometric measurement of reagent pH can thereby determine the sample DIC over a wide dynamic range, with inherent calibration provided by the pH indicator's molecular characteristics. Field trials indicate that SEAS-DIC performs well in biofouling and turbid waters, with a DIC accuracy and precision of ∼2 μmol kg(-1) and a measurement rate of approximately once per minute. The acidic reagent protects the sensor cell from biofouling, and the gas-permeable membrane excludes particulates from the optical path. This instrument, the first spectrophotometric system capable of automated in situ DIC measurements, positions DIC to become a key parameter for in situ CO2-system characterizations. |
| المشرفين على المادة: | 7440-44-0 (Carbon) |
| تواريخ الأحداث: | Date Created: 20130903 Date Completed: 20140505 Latest Revision: 20220409 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1021/es4014807 |
| PMID: | 23991621 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 1520-5851 |
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| DOI: | 10.1021/es4014807 |