http://lod.bco-dmo.org/id/dataset/738833
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2018-06-19
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Experimental observations of radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide
2019-04-01
publication
2019-04-01
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-04-01
publication
https://doi.org/10.1575/1912/bco-dmo.738833.1
Peter Santschi
Texas A&M, Galveston
principalInvestigator
Antonietta Quigg
Texas A&M, Galveston
principalInvestigator
Kathleen Schwehr
Texas A&M, Galveston
principalInvestigator
Chen Xu
Texas A&M, Galveston
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Santschi, P., Quigg, A., Schwehr, K., Xu, C. (2019) Experimental observations of radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-04-01 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.738833.1 [access date]
The uptake and binding of six particle-reactive and/or redox-sensitive radionuclides (210Pb, 234Th, 7Be, 59Fe, 237Np and 233Pa) with different organic functionalities of three size fractions. Dataset Description: <p>The uptake and binding of six particle-reactive and/or redox-sensitive radionuclides (210Pb, 234Th, 7Be, 59Fe, 237Np and 233Pa) with different organic functionalities of three size fractions.</p> Methods and Sampling: <p>Basically, the humic acids (HAs) from different soils were isolated and further purified according to an alkaline extraction method from the International Humic Substance Society (IHSS) (Xu et al., 2011). Briefly, the dried soil was pre-treated with a 1 M HCl solution to separate the supernatant (i.e., fulvic acid) from the soil, followed by the addition of 0.1 M KOH under N2 purging and 0.3 M K+, as KCl. Then, the supernatant was acidified to pH of 1.0 using 6 M HCl to precipitate HAs, which were pelleted by centrifugation and then suspended in a 0.1 M HCl/0.3 M HF solution overnight for five times to minimize ash content. After HF digestion, Milli-Q water was used to wash HA with the purpose of minimizing ions. HA characterization data were previously reported elsewhere (Fujitake et al., 2012) and on IHSS website (http://humic-substances.org/13c-nmr-estimates-of-carbon-distribution-in-ihss-samples/).&nbsp;</p>
<p>The HA-groundwater suspension batch experiments were conducted basically similar to a previously reported procedure (Xu et al., 2014). In brief, 5-6 mg of the purified HAs were pre-equilibrated in artificial groundwater in the centrifuge tubes for 48 h at room temperature (20 ºC) to reach the dissolution equilibrium, since the HAs were extraceted under pH &lt; 1 but the pH of artificial groundwater is 5.5. Then, ~50 Bq of each gamma emitting radionuclide, including 234Th, 237Np-233Pa, 210Pb, 7Be and 59Fe was added to the HA-groundwater slurry to a final volume of 4 mL. The radiolabeled HA-groundwater slurry was then mixed continuously for 7 days in the dark with an end-over-end mixer to ensure that quasi-equilibrium was attained15. After one-week period, particulate (&gt;0.45 µm), colloidal (3 kDa to 0.45 µm), and truly dissolved (&lt;3 kDa) phases were size fractionationated by using 0.45 µm centrifugal filter tubes followed by ultrafiltration with 3 kDa Microsep centrifugal filter tubes (Millipore). Each fraction was collected for the measurement of radionuclide activity and organic matter concentrations. All the size fractions, including the particulate, colloidal and truly dissolved phases were corrected to the same volume and geometry for the counting of 234Th, 233Pa, 237Np, 210Pb, 7Be and 59Fe activity concentrations by a Canberra ultrahigh purity germanium well gamma detector.</p>
<p>Concentrations of organic carbon and nitrogen in the colloidal and truly dissolved fractions were determined using a Shimadzu TOC-L analyzer. The organic carbon and nitrogen concentrations in the particulate phase of the HA-groundwater suspension were calculated as the difference between the total carbon/nitrogen contents of the added HAs and the sum of colloidal and truly dissolved phases.&nbsp;</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1356453 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1356453
completed
Peter Santschi
Texas A&M, Galveston
4097404476
200 Seawolf Pkwy
Galveston
TX
77553
US
santschi@tamug.edu
pointOfContact
Antonietta Quigg
Texas A&M, Galveston
409-740-4990
200 Seawolf Pkwy
Galveston
TX
77553
quigga@tamug.edu
pointOfContact
Kathleen Schwehr
Texas A&M, Galveston
200 Seawolf Pkwy
Galveston
TX
77553
pointOfContact
Chen Xu
Texas A&M, Galveston
409-354-8312
200 Seawolf Pkwy
Galveston
TX
77553
xuc@tamug.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Sample_ID
part_210Pb
part_234Th
part_7Be
part_59Fe
part_237Np
part_233Pa
col_210Pb
col_234Th
col_7Be
col_59Fe
col_237Np
col_233Pa
logKd_210Pb
logKd_234Th
logKd_7Be
logKd_59Fe
logKd_237Np
logKd_233Pa
logKdc_210Pb
logKdc_234Th
logKdc_7Be
logKdc_59Fe
logKdc_237Np
logKdc_233Pa
POC
PN
COC
CON
pcnt_POC
pcnt_PN
pcnt_COC
pcnt_CON
No
HA_ID
Site
Soil_Order
Land_use
Beckman Coulter Allegra X-12 centrifuge
Canberra ultrahigh purity germanium well gamma detector
Shimadzu TOC-L analyzer
theme
None, User defined
sample identification
radioactive isotope concentration
No BCO-DMO term
particulate organic Carbon (POC)
Total Particulate Nitrogen
Site_ID
sample description
site
site description
featureType
BCO-DMO Standard Parameters
Centrifuge
Gamma Ray Spectrometer
Shimadzu TOC-L Analyzer
instrument
BCO-DMO Standard Instruments
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Biopolymers as carrier phases for selected natural radionuclides (of Th, Pa, Pb, Po, Be) in diatoms and coccolithophores
https://osprey.bco-dmo.org/project/735996
Biopolymers as carrier phases for selected natural radionuclides (of Th, Pa, Pb, Po, Be) in diatoms and coccolithophores
<p><span style="background-color:transparent; color:rgb(0, 0, 0); font-family:arial; font-size:11pt">NSF Award Abstract:</span></p>
<p>Particle-associated natural radioisotopes are transported to the ocean floor mostly via silica and carbonate ballasted particles, allowing their use as tracers for particle transport. Th(IV), Pa (IV,V), Po(IV), Pb(II) and Be(II) radionuclides are important proxies in oceanographic investigations, used for tracing particle and colloid cycling, estimating export fluxes of particulate organic carbon, tracing air-sea exchange, paleoproductivity, and/or ocean circulation in paleoceanographic studies. Even though tracer approaches are considered routine, there are cases where data interpretation or validity has become controversial, largely due to uncertainties about inorganic proxies and organic carrier molecules. Recent studies showed that cleaned diatom frustules and pure silica particles, sorb natural radionuclides to a much lower extent (by 1-2 orders of magnitude) than whole diatom cells (with or without shells). Phytoplankton that build siliceous or calcareous shells, such as the diatoms and coccolithophores, are assembled via bio-mineralization processes using biopolymers as nanoscale templates. These templates could serve as possible carriers for radionuclides and stable metals.</p>
<p>In this project, a research team at the Texas A & M University at Galveston hypothesize that radionuclide sorption is controlled by selective biopolymers that are associated with biogenic opal (diatoms), CaCO3 (coccolithophores) and the attached exopolymeric substances (EPS), rather than to pure mineral phase. To pursue this idea, the major objectives of their research will include separation, identification and molecular-level characterization of the individual biopolymers (e.g., polysaccharides, uronic acids, proteins, hydroquinones, hydroxamate siderophores, etc.) that are responsible for binding different radionuclides (Th, Pa, Pb, Po and Be) attached to cells or in the matrix of biogenic opal or CaCO3 as well as attached EPS mixture, in laboratory grown diatom and coccolithophore cultures. Laboratory-scale radiolabeling experiments will be conducted, and different separation techniques and characterization techniques will be applied.</p>
<p>Intellectual Merit : It is expected that this study will help elucidate the molecular basis of the templated growth of diatoms and coccoliths, EPS and their role in scavenging natural radionuclides in the ocean, and help resolve debates on the oceanographic tracer applications of different natural radioisotopes (230,234Th, 231Pa, 210Po, 210Pb and 7,10Be). The proposed interdisciplinary research project will require instrumental approaches for molecular-level characterization of these radionuclides associated carrier molecules.</p>
<p>Broader Impacts: The results of this study will be relevant for understanding biologically mediated ocean scavenging of radionuclides by diatoms and coccoliths which is important for carbon cycling in the ocean, and will contribute to improved interpretation of data obtained by field studies especially through the GEOTRACES program. This new program will enhance training programs at TAMUG for postdocs, graduate and undergraduate students. Lastly, results will be integrated in college courses and out-reach activities at Texas A&M University, including NSF-REU, Sea Camp, Elder Hostel and exhibits at the local science fair and interaction with its after-school program engaging Grade 9-12 students from groups traditionally underrepresented.</p>
Biopolymers for radionuclides
largerWorkCitation
project
eng; USA
oceans
2019-04-01
0
BCO-DMO catalogue of parameters from Experimental observations of radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/739033.rdf
Name: Sample_ID
Units: unitless
Description: <p>Identifier for the sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/739034.rdf
Name: part_210Pb
Units: unitless
Description: <p>Particulate activity percentage for Lead 210</p>
http://lod.bco-dmo.org/id/dataset-parameter/739035.rdf
Name: part_234Th
Units: unitless
Description: <p>Particulate activity percentage for Thorium 234</p>
http://lod.bco-dmo.org/id/dataset-parameter/739036.rdf
Name: part_7Be
Units: unitless
Description: <p>Particulate activity percentage for Beryllium 7</p>
http://lod.bco-dmo.org/id/dataset-parameter/739037.rdf
Name: part_59Fe
Units: unitless
Description: <p>Particulate activity percentage for Iron 59</p>
http://lod.bco-dmo.org/id/dataset-parameter/739038.rdf
Name: part_237Np
Units: unitless
Description: <p>Particulate activity percentage for Neptunium 237</p>
http://lod.bco-dmo.org/id/dataset-parameter/739039.rdf
Name: part_233Pa
Units: unitless
Description: <p>Particulate activity percentage for Protactinium 233</p>
http://lod.bco-dmo.org/id/dataset-parameter/739040.rdf
Name: col_210Pb
Units: unitless
Description: <p>Colloidal activity percentage for Lead 210</p>
http://lod.bco-dmo.org/id/dataset-parameter/739041.rdf
Name: col_234Th
Units: unitless
Description: <p>Colloidal activity percentage for Thorium 234</p>
http://lod.bco-dmo.org/id/dataset-parameter/739042.rdf
Name: col_7Be
Units: unitless
Description: <p>Colloidal activity percentage for Beryllium 7</p>
http://lod.bco-dmo.org/id/dataset-parameter/739043.rdf
Name: col_59Fe
Units: unitless
Description: <p>Colloidal activity percentage for Iron 59</p>
http://lod.bco-dmo.org/id/dataset-parameter/739044.rdf
Name: col_237Np
Units: unitless
Description: <p>Colloidal activity percentage for Neptunium 237</p>
http://lod.bco-dmo.org/id/dataset-parameter/739045.rdf
Name: col_233Pa
Units: unitless
Description: <p>Colloidal activity percentage for Protactinium 233</p>
http://lod.bco-dmo.org/id/dataset-parameter/739046.rdf
Name: logKd_210Pb
Units: unitless
Description: <p>partitioning coefficient (logKd) for Lead 210</p>
http://lod.bco-dmo.org/id/dataset-parameter/739047.rdf
Name: logKd_234Th
Units: unitless
Description: <p>partitioning coefficient (logKd) for Thorium 234</p>
http://lod.bco-dmo.org/id/dataset-parameter/739048.rdf
Name: logKd_7Be
Units: unitless
Description: <p>partitioning coefficient (logKd) for Beryllium 7</p>
http://lod.bco-dmo.org/id/dataset-parameter/739049.rdf
Name: logKd_59Fe
Units: unitless
Description: <p>partitioning coefficient (logKd) for Iron 59</p>
http://lod.bco-dmo.org/id/dataset-parameter/739050.rdf
Name: logKd_237Np
Units: unitless
Description: <p>partitioning coefficient (logKd) for Neptunium 237</p>
http://lod.bco-dmo.org/id/dataset-parameter/739051.rdf
Name: logKd_233Pa
Units: unitless
Description: <p>partitioning coefficient (logKd) for Protactinium 233</p>
http://lod.bco-dmo.org/id/dataset-parameter/739052.rdf
Name: logKdc_210Pb
Units: unitless
Description: <p>partitioning coefficient in colloidal fraction (logKdc) for Lead 210</p>
http://lod.bco-dmo.org/id/dataset-parameter/739053.rdf
Name: logKdc_234Th
Units: unitless
Description: <p>partitioning coefficient in colloidal fraction (logKdc) for Thorium 234</p>
http://lod.bco-dmo.org/id/dataset-parameter/739054.rdf
Name: logKdc_7Be
Units: unitless
Description: <p>partitioning coefficient in colloidal fraction (logKdc) for Beryllium 7</p>
http://lod.bco-dmo.org/id/dataset-parameter/739055.rdf
Name: logKdc_59Fe
Units: unitless
Description: <p>partitioning coefficient in colloidal fraction (logKdc) for Iron 59</p>
http://lod.bco-dmo.org/id/dataset-parameter/739056.rdf
Name: logKdc_237Np
Units: unitless
Description: <p>partitioning coefficient in colloidal fraction (logKdc) for Neptunium 237</p>
http://lod.bco-dmo.org/id/dataset-parameter/739057.rdf
Name: logKdc_233Pa
Units: unitless
Description: <p>partitioning coefficient in colloidal fraction (logKdc) for Protactinium 233</p>
http://lod.bco-dmo.org/id/dataset-parameter/739058.rdf
Name: POC
Units: miligrams per liter (mg/L)
Description: <p>Concentration of Particulate Organic Carbon (POC) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/739059.rdf
Name: PN
Units: miligrams per liter (mg/L)
Description: <p>Concentration of Particulate Nitrogen (PN) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/739060.rdf
Name: COC
Units: miligrams per liter (mg/L)
Description: <p>Concentration of Colloidal Organic Carbon (COC) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/739061.rdf
Name: CON
Units: miligrams per liter (mg/L)
Description: <p>Concentration of Colloidal Organic Nitrogen (CON) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/739062.rdf
Name: pcnt_POC
Units: unitless
Description: <p>Percentage of Particulate Organic Carbon (POC) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/739063.rdf
Name: pcnt_PN
Units: unitless
Description: <p>Percentage of Particulate Nitrogen (PN) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/739064.rdf
Name: pcnt_COC
Units: unitless
Description: <p>Percentage of Colloidal Organic Carbon (COC) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/739065.rdf
Name: pcnt_CON
Units: unitless
Description: <p>Percentage of Colloidal Organic Nitrogen (CON) after one week HAs-groundwater resuspension</p>
http://lod.bco-dmo.org/id/dataset-parameter/764000.rdf
Name: No
Units: unitless
Description: <p>site number</p>
http://lod.bco-dmo.org/id/dataset-parameter/764001.rdf
Name: HA_ID
Units: unitless
Description: <p>Sample description</p>
http://lod.bco-dmo.org/id/dataset-parameter/764002.rdf
Name: Site
Units: unitless
Description: <p>Name of site.</p>
http://lod.bco-dmo.org/id/dataset-parameter/764003.rdf
Name: Soil_Order
Units: unitless
Description: <p>Soil Order</p>
http://lod.bco-dmo.org/id/dataset-parameter/764004.rdf
Name: Land_use
Units: unitless
Description: <p>Land use description</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2730
https://darchive.mblwhoilibrary.org/bitstream/1912/23942/1/dataset-738833_radionuclide-uptake-humic-acids__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.738833.1
download
onLine
dataset
<p>Basically, the humic acids (HAs) from different soils were isolated and further purified according to an alkaline extraction method from the International Humic Substance Society (IHSS) (Xu et al., 2011). Briefly, the dried soil was pre-treated with a 1 M HCl solution to separate the supernatant (i.e., fulvic acid) from the soil, followed by the addition of 0.1 M KOH under N2 purging and 0.3 M K+, as KCl. Then, the supernatant was acidified to pH of 1.0 using 6 M HCl to precipitate HAs, which were pelleted by centrifugation and then suspended in a 0.1 M HCl/0.3 M HF solution overnight for five times to minimize ash content. After HF digestion, Milli-Q water was used to wash HA with the purpose of minimizing ions. HA characterization data were previously reported elsewhere (Fujitake et al., 2012) and on IHSS website (http://humic-substances.org/13c-nmr-estimates-of-carbon-distribution-in-ihss-samples/).&nbsp;</p>
<p>The HA-groundwater suspension batch experiments were conducted basically similar to a previously reported procedure (Xu et al., 2014). In brief, 5-6 mg of the purified HAs were pre-equilibrated in artificial groundwater in the centrifuge tubes for 48 h at room temperature (20 ºC) to reach the dissolution equilibrium, since the HAs were extraceted under pH &lt; 1 but the pH of artificial groundwater is 5.5. Then, ~50 Bq of each gamma emitting radionuclide, including 234Th, 237Np-233Pa, 210Pb, 7Be and 59Fe was added to the HA-groundwater slurry to a final volume of 4 mL. The radiolabeled HA-groundwater slurry was then mixed continuously for 7 days in the dark with an end-over-end mixer to ensure that quasi-equilibrium was attained15. After one-week period, particulate (&gt;0.45 µm), colloidal (3 kDa to 0.45 µm), and truly dissolved (&lt;3 kDa) phases were size fractionationated by using 0.45 µm centrifugal filter tubes followed by ultrafiltration with 3 kDa Microsep centrifugal filter tubes (Millipore). Each fraction was collected for the measurement of radionuclide activity and organic matter concentrations. All the size fractions, including the particulate, colloidal and truly dissolved phases were corrected to the same volume and geometry for the counting of 234Th, 233Pa, 237Np, 210Pb, 7Be and 59Fe activity concentrations by a Canberra ultrahigh purity germanium well gamma detector.</p>
<p>Concentrations of organic carbon and nitrogen in the colloidal and truly dissolved fractions were determined using a Shimadzu TOC-L analyzer. The organic carbon and nitrogen concentrations in the particulate phase of the HA-groundwater suspension were calculated as the difference between the total carbon/nitrogen contents of the added HAs and the sum of colloidal and truly dissolved phases.&nbsp;</p>
Specified by the Principal Investigator(s)
<p>Microsoft Excel Ver. 15.15; KaleidaGraph Ver. 4.1.3</p>
<p>BCO-DMO Processing Notes:<br />
*&nbsp;added conventional header with dataset name, PI name, version date<br />
* modified parameter names to conform with BCO-DMO naming conventions<br />
* reorganized data from three&nbsp;tables into one table<br />
* added 'nd' for STD and AVG values which were not computed<br />
* included additional site information as provided.</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Beckman Coulter Allegra X-12 centrifuge
Beckman Coulter Allegra X-12 centrifuge
PI Supplied Instrument Name: Beckman Coulter Allegra X-12 centrifuge PI Supplied Instrument Description:Beckman Coulter Allegra X-12 centrifuge Instrument Name: Centrifuge Instrument Short Name: Instrument Description: A machine with a rapidly rotating container that applies centrifugal force to its contents, typically to separate fluids of different densities (e.g., cream from milk) or liquids from solids.
Canberra ultrahigh purity germanium well gamma detector
Canberra ultrahigh purity germanium well gamma detector
PI Supplied Instrument Name: Canberra ultrahigh purity germanium well gamma detector PI Supplied Instrument Description:Canberra ultrahigh purity germanium well gamma detector Model GCW3024 Instrument Name: Gamma Ray Spectrometer Instrument Short Name: Instrument Description: Instruments measuring the relative levels of electromagnetic radiation of different wavelengths in the gamma-ray waveband.
Shimadzu TOC-L analyzer
Shimadzu TOC-L analyzer
PI Supplied Instrument Name: Shimadzu TOC-L analyzer PI Supplied Instrument Description:Concentrations of organic carbon and nitrogen in the colloidal and truly dissolved fractions were determined using a Shimadzu TOC-L analyzer. Instrument Name: Shimadzu TOC-L Analyzer Instrument Short Name:Shimadzu TOC-L Instrument Description: A Shimadzu TOC-L Analyzer measures DOC by high temperature combustion method.
Developed by Shimadzu, the 680 degree C combustion catalytic oxidation method is now used worldwide. One of its most important features is the capacity to efficiently oxidize hard-to-decompose organic compounds, including insoluble and macromolecular organic compounds. The 680 degree C combustion catalytic oxidation method has been adopted for the TOC-L series.
http://www.shimadzu.com/an/toc/lab/toc-l2.html Community Standard Description: http://onto.nerc.ac.uk/CAST/124.html