In Situ Sensor Technology for Simultaneous Spectrophotometric Measurements of Seawater Total Dissolved Inorganic Carbon and pH

2015 ◽  
Vol 49 (7) ◽  
pp. 4441-4449 ◽  
Author(s):  
Zhaohui Aleck Wang ◽  
Frederick N. Sonnichsen ◽  
Albert M. Bradley ◽  
Katherine A. Hoering ◽  
Thomas M. Lanagan ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Sensor Technology ◽  
Total Dissolved Inorganic Carbon ◽  
In Situ Sensor

Evaluation of reagentless pH modification for in situ ocean analysis: determination of dissolved inorganic carbon using mass spectrometry

2013 ◽  
Vol 27 (5) ◽  
pp. 635-642 ◽  
Author(s):  
Andres M. Cardenas-Valencia ◽  
Lori R. Adornato ◽  
Ryan J. Bell ◽  
Robert H. Byrne ◽  
R. Timothy Short
Keyword(s):  
Mass Spectrometry ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Analysis Determination

scholarly journals Texas A&M University Radiocarbon Dates IV

Radiocarbon ◽  
1978 ◽  
Vol 20 (3) ◽  
pp. 455-460 ◽  
Author(s):  
R A Parker ◽  
W M Sackett
Keyword(s):  
Water Column ◽  
Mississippi River ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
River Delta ◽  
Cariaco Basin ◽  
Mississippi River Delta ◽  
Radiocarbon Dates ◽  
Carbonate Carbon ◽  
Total Dissolved Inorganic Carbon

Organic and carbonate carbon in sediments deposited in the Cariaco Basin and on the Mississippi River Delta and the total dissolved inorganic carbon in four water column profiles comprise the samples in this list. Except as noted below the samples were processed using the benzene synthesis and other procedures described by Mathews, et al (1972).

Controls on in situ oxygen and dissolved inorganic carbon dynamics in peats of a temperate fen

2012 ◽  
Vol 117 (G2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Cristian Estop-Aragonés ◽  
Klaus-Holger Knorr ◽  
Christian Blodau
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Carbon Dynamics

scholarly journals Hydrogeochemical Characters of Karst Aquifers in Central Italy and Relationship with Neotectonics

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1926
Author(s):  
Paolo Madonia ◽  
Marianna Cangemi ◽  
Ygor Oliveri ◽  
Carlo Germani
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Central Italy ◽  
Karst Aquifers ◽  
Chemical Parameters ◽  
Physical Chemical ◽  
Preparatory Phase ◽  
Dissolved Ions ◽  
Total Dissolved Inorganic Carbon ◽  
Karst Systems

Groundwater from karst circulation systems of Central Italy were sampled and analyzed, in 2018, for delineating a preliminary, general geochemical framework of their relationship with neotectonics, in an area characterized by a frequent and often destructive seismicity. We determined field physical-chemical parameters, concentrations of main dissolved ions and gases and isotopic composition of water (δ18O, δD) and total dissolved inorganic carbon (δ13C TDIC). We discriminated between “normal” hydro-karst systems and multi-component aquifers, composed of meteoric groundwater that have also interacted with rocks of different lithological nature and/or deep fluids. These multicomponent aquifers are of potential interest in the monitoring of neotectonics activity, because changes in the stress field associated with the preparatory phase of an earthquake may affect the permeability of rocks, in turn causing variation of their chemical-isotopic character. The geographical distribution of these aquifers seems to be controlled by tectonics. In fact, the Olevano–Antrodoco–Sibillini thrust separates the more anomalous sites, located westwards of it, from the groundwater bodies at its eastern side, showing a more typical karst character.

scholarly journals Short-term fate of phytodetritus in sediments across the Arabian Sea Oxygen Minimum Zone

2008 ◽  
Vol 5 (1) ◽  
pp. 43-53 ◽  
Author(s):  
J. H. Andersson ◽  
C. Woulds ◽  
M. Schwartz ◽  
G. L. Cowie ◽  
L. A. Levin ◽  
...  
Keyword(s):  
Arabian Sea ◽  
Inorganic Carbon ◽  
Surface Sediments ◽  
Dissolved Inorganic Carbon ◽  
Oxygen Minimum Zone ◽  
Short Term ◽  
Minimum Zone ◽  
Algal Material ◽  
Oxygen Minimum

Abstract. The short-term fate of phytodetritus was investigated across the Pakistan margin of the Arabian Sea at water depths ranging from 140 to 1850 m, encompassing the oxygen minimum zone (~100–1100 m). Phytodetritus sedimentation events were simulated by adding ~44 mmol 13C-labelled algal material per m2 to surface sediments in retrieved cores. Cores were incubated in the dark, at in situ temperature and oxygen concentrations. Overlying waters were sampled periodically, and cores were recovered and sampled (for organisms and sediments) after durations of two and five days. The labelled carbon was subsequently traced into bacterial lipids, foraminiferan and macrofaunal biomass, and dissolved organic and inorganic pools. The majority of the label (20 to 100%) was in most cases left unprocessed in the sediment at the surface. The largest pool of processed carbon was found to be respiration (0 to 25% of added carbon), recovered as dissolved inorganic carbon. Both temperature and oxygen were found to influence the rate of respiration. Macrofaunal influence was most pronounced at the lower part of the oxygen minimum zone where it contributed 11% to the processing of phytodetritus.

scholarly journals Technical Note: Precise quantitative measurements of total dissolved inorganic carbon from small amounts of seawater using a gas chromatographic system

2013 ◽  
Vol 10 (10) ◽  
pp. 6601-6608 ◽  
Author(s):  
T. Hansen ◽  
B. Gardeler ◽  
B. Matthiessen
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Biological Effects ◽  
Total Sample ◽  
Measurement Range ◽  
Technical Note ◽  
Infrared Detection ◽  
Detection Methods ◽  
Total Dissolved Inorganic Carbon ◽  
Ct Measurement

Abstract. Total dissolved inorganic carbon (CT) is one of the most frequently measured parameters used to calculate the partial pressure of carbon dioxide in seawater. Its determination has become increasingly important because of the rising interest in the biological effects of ocean acidification. Coulometric and infrared detection methods are currently favored in order to precisely quantify CT. These methods however are not sufficiently validated for CT measurements of biological experiments manipulating seawater carbonate chemistry with an extended CT measurement range (~1250–2400 μmol kg–1) compared to natural open ocean seawater (~1950–2200 μmol kg−1). The requirement of total sample amounts between 0.1–1 L seawater in the coulometric- and infrared detection methods potentially exclude their use for experiments working with much smaller volumes. Additionally, precise CT analytics become difficult with high amounts of biomass (e.g., phytoplankton cultures) or even impossible in the presence of planktonic calcifiers without sample pre-filtration. Filtration however, can alter CT concentration through gas exchange induced by high pressure. Addressing these problems, we present precise quantification of CT using a small, basic and inexpensive gas chromatograph as a CT analyzer. Our technique is able to provide a repeatability of ±3.1 μmol kg−1, given by the pooled standard deviation over a CT range typically applied in acidification experiments. 200 μL of sample is required to perform the actual CT measurement. The total sample amount needed is 12 mL. Moreover, we show that sample filtration is applicable with only minor alteration of the CT. The method is simple, reliable and with low cumulative material costs. Hence, it is potentially attractive for all researchers experimentally manipulating the seawater carbonate system.

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