http://lod.bco-dmo.org/id/dataset/914915
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
2023-11-14
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Iodine speciation and isotope ratio values from iodine radiotracer incubation experiments conducted on the R/V Atlantic Explorer cruise AE1825 with samples collected at BATS and Hydrostation S in September of 2018
2025-10-14
publication
2025-10-14
revision
BCO-DMO Linked Data URI
2025-10-14
creation
http://lod.bco-dmo.org/id/dataset/914915
Dalton Hardisty
Michigan State University
principalInvestigator
Kevin Sutherland
Harvard University
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: Hardisty, D., Sutherland, K., Schnur, A. (2025) Iodine speciation and isotope ratio values from iodine radiotracer incubation experiments conducted on the R/V Atlantic Explorer cruise AE1825 with samples collected at BATS and Hydrostation S in September of 2018. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-10-14 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/914915 [access date]
Methods and Sampling: <p>Seawater was collected from the Bermuda Atlantic Time Series (BATS) and Hydrostation S (Hydro) sites in the Sargasso Sea in September 2018.&nbsp; Depth profile investigations at BATS were taken at 32.343⁰N 64.594⁰W at 21 separate depths between 1m and 4500m.&nbsp; Hydrostation S samples were taken at 32.165⁰N 64.501⁰W at 10 depths between 1m and 500m.&nbsp; Incubation water was taken from two depths (1m and 240m) and collected into four carboys (two euphotic (1m) and two subphotic (240m)).&nbsp; One carboy from each depth was filtered using a 0.2µm filter to remove bacteria and other biology and particles while another was left unfiltered.&nbsp; 129I (t1/2&nbsp; ~15.7 My) (Eckert and Ziegler Isotope Products ©) (Hardisty et al., 2020, Hardisty et al., 2021), was added directly to each of the carboys at a targeted concentration of ~70nM 129I- for investigating iodine redox reactions in natural seawater over time.&nbsp; 129I- was added before aliquoting the carboy water for individual incubations to ensure homogenous 129I- concentrations at t0 for all incubations.&nbsp; 200ml from each carboy were fractionated into separated incubation containers.&nbsp; Samples for t0 were immediately subsampled from spiked incubation containers, with this and subsequent (t1, t2, tf) subsamples being ~50ml.&nbsp; All subsamples were immediately filtered at 0.2µm to end interaction with biology after sampling.&nbsp; Subsamples were refrigerated and stored at 4°C until they returned to Michigan State University and were frozen for storage.</p>
<p>Five incubation factors were used to create 20 incubation trials using a ship-deck light-filtering incubator to mimic at-depth light filtration, cooled with a continuous flow of ambient surface seawater and stored in translucent and amber Nalgene bottles for dark incubations: each done in triplicate.&nbsp; Factors included: 1) filtering of samples through a 0.2µm syringe filter, meant as a control to screen filtered seawater of bacteria and macro-organisms and particles, kept in either the light or the dark depending on incubation, (Campos et al., 1996, Farrenkoph et al., 1997, Hardisty et al., 2020); 2) addition of O2•- dismutase (SOD) to incubations both filtered and unfiltered, but all left in the dark, intended as a control to remove ambient O2•- in seawater (Sutherland et al., 2020, Li et al., 2012, Diaz et al., 2013); 3) addition of superoxide thermal source (SOTS) and hydrogen peroxide (H2O2) to filtered samples kept in the dark in separate experiments, both suspected of being able to aid in oxidation of I- to IO3- in seawater, 4) unfiltered water in the dark to determine the role, if any, of photochemical reactions that may cause the reduction of IO3- to I- in the presence of organic matter (Chance et al., 2014, Spokes and Liss 1996); five additions of MnCl2 to iterations of the above in order to consider the potential of preferential Mn2+ oxidation relative to I-.&nbsp; Note that controls 2 and 5 were only relevant if I- oxidation was detected in the other controls.</p>
<p>Seawater for samples was taken from both photic (1m) and subphotic (240m) depths and collected in carboys.&nbsp; Superoxide thermal source was kept frozen (-80⁰C) until it was added by pipette to two of the incubations (11 and 19) as a combination of 1ml dimethyl sulfoxide (DMSO) + 1mg SOTS (3027.55µM SOTS) (Cayman Chemicals, CAS number 223507-96-8) at a volume targeting 10 nM O2•- (Heller and Croot, 2010).&nbsp; This was made fresh daily immediately before adding to samples and added daily to account for natural decay.&nbsp; The O2•- concentration of the SOTS stock was not analyzed but O2•- concentration was analyzed in one experiment a few hours post-SOTS addition – to allow to reach steady state concentrations – to confirm O2•- accumulation near target levels. Hydrogen peroxide (30%) was added at a volume targeting 50nM H2O2 in each solution.&nbsp; SOD was added by pipette daily – thus accounting for decay and titration via potentially newly formed O2•- within the incubations – from a stock volume of 4kU/ml to incubations to produce samples with SOD volume of 0.32kU/ml.&nbsp; Given potential long oxidation timescales of I-, all incubations were performed over a 140-hour time period, with subsamples collected for iodine species measurement at t0, ~t40, ~t88, and ~t140 hours.<br />
<br />
The concentrations of IO3- and I- from the incubations were determined at MSU after sample collection via the methods outlined by Jickells (1988) for spectrophotometry (IO3-) and by Hardisty et al., (2020) for ion exchange chromatography (I-, DOI) and ICP-MS.</p>
<p>Iodine isotope ratios were determined via the methods outlined in Hardisty et al., (2020) and Hardisty et al., (2021) using chromatographic separation and subsequent analysis via multi-collector ICP-MS (MC-ICP-MS).<br />
<br />
See the results publication Schnur et al. (2024) for more information.</p>
<p>See the related dataset "BATS/Hydrostation S: iodine speciation and superoxide concentration" (https://www.bco-dmo.org/dataset/914955) for details of the&nbsp;steady-state concentration of O2•-&nbsp;methodology.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1829406 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1829406
completed
Dalton Hardisty
Michigan State University
(517) 353-5744
288 Farm Lane, Room 207
East Lansing
MI
488242600
US
hardist1@msu.edu
pointOfContact
Kevin Sutherland
Harvard University
ksutherland@fas.harvard.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
sample
incubation_num
timepoint
hours
date_time_collected_AT
ISO_DateTime_Collected_UTC
depth_m
iodate_spec_nM
iodate_ICPMS_nM
DOI_ICPMS_nM
iodide_ICPMS_nM
Riodate
Riodide
RDOI
notes
Triple Quadrupole Inductively-Coupled Plasma Mass Spectrometer
ThermoFinnigan Neptune MC-ICP-MS
VWR UV-Vis Scanning 3100 PC spectrophotometer
theme
None, User defined
sample identification
sample description
time_point
time_elapsed
Date and time
ISO_DateTime_UTC
depth
iodate (IO3-)
dissolved organic iodine (DOI)
iodide, iodine anion (I-)
Ratio isotopes 129I/127I in iodate (IO3-)
Ratio isotopes 127I/129I in iodide (I-)
No BCO-DMO term
comments
featureType
BCO-DMO Standard Parameters
Inductively Coupled Plasma Mass Spectrometer
Multi Collector Inductively Coupled Plasma Mass Spectrometer
Spectrophotometer
instrument
BCO-DMO Standard Instruments
AE1825
service
Deployment Activity
BATS, Bermuda
place
Locations
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.
Collaborative Research: Experimental constraints on the rates and mechanisms of iodine redox transformations in seawater
https://osprey.bco-dmo.org/project/860005
Collaborative Research: Experimental constraints on the rates and mechanisms of iodine redox transformations in seawater
<p><em>NSF Award Abstract:</em><br />
The goal of this study is to constrain the chemical and biological reactions controlling the iodine cycle in the marine environment. Seawater iodine plays a key role in the cycling of carbon, dissolved oxygen, and ozone, and has been hypothesized to also influence the elemental cycles of manganese and nitrogen. The composition of iodine in sedimentary rocks has also been proposed as an archive of ancient seawater oxygen availability. Unfortunately, few constraints currently exist on iodine reaction rates and mechanisms in seawater, limiting quantitative applications. To remedy this, scientists from Michigan State University (MSU) and Woods Hole Institute of Oceanography (WHOI) will use a rare iodine isotope, iodine-129, as a tracer of iodine chemical reactions in controlled seawater incubations designed to determine specific reaction rates and mechanisms from two end-member environments: well-oxygenated mid-Atlantic seawater as part of the United Kingdom-based Atlantic Meridional Transect (AMT) annual time series and low oxygen zones in the Pacific Ocean. The project will contribute to building the future United States STEM (Science Technology, Engineering and Mathematics)-trained workforce via the training of one graduate student and at least one undergraduate student from the campus of MSU. This includes hands-on field training and experience through two research cruises, extensive analytical training at WHOI, as well as experience in Earth system modeling simulations of iodine-oxygen interactions at the modern and ancient sea surface. The experimental constraints are designed to inform broader modeling of iodine-related chemical cycles for scientific communities including atmospheric and marine chemists, environmental regulators, and geologists.</p>
<p>The redox potential of iodate-iodide is uniquely poised for probable applications as both a redox tracer of Oxygen Minimum Zone (OMZ)-like conditions in modern and past oceans as well as a critical component of air-sea exchange reactions regulating tropospheric ozone levels. However, a currently limited understanding of the first-order rates and mechanisms of iodine redox transformations in seawater limits applications, which our research seeks to address. Specifically: (1) Marine iodate production, the oxidized and most abundant species, has yet to be observed experimentally despite the fact that most marine inputs from estuarine and other sources consist of the reduced species, iodide. Mass balance demands that in situ marine oxidation is widespread. The oxidant is unknown, but it is unlikely oxygen (O2) due to thermodynamic barriers. (2) Unconstrained in situ processes drive significant accumulation of reduced iodide in photic waters globally, particularly at low latitudes, which ultimately act as a major tropospheric ozone sink. (3) Constraints on rates and reaction mechanisms in OMZs are limited despite iodine being amongst the first redox-sensitive species to reduce under declining O2. We will employ an isotope tracer—iodine-129 as both iodide and iodate—in shipboard seawater incubation experiments to determine the rates and mechanisms of iodine redox transformations governing these widespread trends. This method will be deployed across the largest known gradients in marine iodine speciation—the Eastern Tropical North Pacific oxygen minimum zone and a latitudinal transect of photic and sub-photic waters as part of the Atlantic Meridional Transect. Incubation experiments from these cruises will be used to place first order constraints on the rates of iodine redox transformations at high- and low-[O2], the loci of most intense iodine redox cycling (both vertically and spatially), as well as the mechanisms driving redox transformations. Controls will test oxidants, biotic versus abiotic processes, as well as interactions and comparisons with similar redox cycles such as manganese and nitrogen.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
Iodine Redox
largerWorkCitation
project
eng; USA
oceans
BATS, Bermuda
-64.501
-64.501
32.165
32.165
2018-09-11
2018-09-18
Martha’s Vineyard Sound and the Eastern Tropical North Pacific oxygen deficient zone
0
BCO-DMO catalogue of parameters from Iodine speciation and isotope ratio values from iodine radiotracer incubation experiments conducted on the R/V Atlantic Explorer cruise AE1825 with samples collected at BATS and Hydrostation S in September of 2018
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/984400.rdf
Name: sample
Units: unitless
Description: <p>Sample number as part of an incubation beginning with DH-BATS2018-""</p>
http://lod.bco-dmo.org/id/dataset-parameter/984401.rdf
Name: incubation_num
Units: unitless
Description: <p>Incubation number 1-20</p>
http://lod.bco-dmo.org/id/dataset-parameter/984402.rdf
Name: timepoint
Units: unitless
Description: <p>Timepoint of incubation, between t0 and tfinal</p>
http://lod.bco-dmo.org/id/dataset-parameter/984403.rdf
Name: hours
Units: hours
Description: <p>Timepoint in hours</p>
http://lod.bco-dmo.org/id/dataset-parameter/984404.rdf
Name: date_time_collected_AT
Units: unitless
Description: <p>Date and time (local) of seawater sample collection in Atlantic/Bermuda Time (AST/ADT)</p>
http://lod.bco-dmo.org/id/dataset-parameter/984405.rdf
Name: ISO_DateTime_Collected_UTC
Units: unitless
Description: <p>Date and time of seawater sample collection in UTC time zone. ISO 8601 format.</p>
http://lod.bco-dmo.org/id/dataset-parameter/984406.rdf
Name: depth_m
Units: meters
Description: <p>Depth of sample taken</p>
http://lod.bco-dmo.org/id/dataset-parameter/984407.rdf
Name: iodate_spec_nM
Units: nanomolar (nM)
Description: <p>Concentration of iodate measured on spectrophotometer</p>
http://lod.bco-dmo.org/id/dataset-parameter/984408.rdf
Name: iodate_ICPMS_nM
Units: nanomolar (nM)
Description: <p>Concentration of iodate measured on an Inductively-Coupled Plasma Mass Spectrometer (ICPMS)</p>
http://lod.bco-dmo.org/id/dataset-parameter/984409.rdf
Name: DOI_ICPMS_nM
Units: nanomolar (nM)
Description: <p>Concentration of dissolved organic iodine (DOI) measured on an Inductively-Coupled Plasma Mass Spectrometer (ICPMS)</p>
http://lod.bco-dmo.org/id/dataset-parameter/984410.rdf
Name: iodide_ICPMS_nM
Units: nanomolar (nM)
Description: <p>Concentration of iodide measured on an Inductively-Coupled Plasma Mass Spectrometer (ICPMS)</p>
http://lod.bco-dmo.org/id/dataset-parameter/984411.rdf
Name: Riodate
Units: unitless
Description: <p>Ratio iodate 129I/127I. Ratio of iodine radioactive isotope 129I to stable isotope 127I in iodate (IO3-).</p>
http://lod.bco-dmo.org/id/dataset-parameter/984412.rdf
Name: Riodide
Units: unitless
Description: <p>Ratio of iodide 129I/127I. Ratio of iodine radioactive isotope 129I to stable isotope 127I in iodide (I-).</p>
http://lod.bco-dmo.org/id/dataset-parameter/984413.rdf
Name: RDOI
Units: unitless
Description: <p>Ratio of DOI 129/127. Ratio of iodine radioactive isotope 129I to stable isotope 127I in dissolved inorganic iodine (DOI).</p>
http://lod.bco-dmo.org/id/dataset-parameter/984414.rdf
Name: notes
Units: unitless
Description: <p>Special notes for dataset</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
23021
https://datadocs.bco-dmo.org/file/M7zvVxnF6BEg6V/914915_v1_iodine_and_isotopes.csv
914915_v1_iodine_and_isotopes.csv
Primary data file for dataset ID 914915, version 1
download
815
https://datadocs.bco-dmo.org/file/DwnjVlKuOq9j8M/ICP-MS_runs-blanks-and-yields.csv
ICP-MS runs blanks and yields
Supplementary Table: ICP-MS runs blanks and yields
*All spot checks had to have their ng summed and divided by initial mass for samples and blanks to know true value (b1+b2)
* This table corresponds to Supplementary Table 5 in Schnur et al. (2024).
Column information (name, description, units):
incubation_num,Incubation number 1-20,unitless,
redox_species,Redox species of iodine being measured,unitless,
200ppb_I-_yield_%,% I- standard recovered via column chromatography and ICPMS,%,
200ppb_KIO3-_yield_%,% KIO3- standard recovered via column chromatography and ICPMS,%,
blank_ppb,Blank values recovered via ICPMS,ppb,
blank_nM,Blank values recovered via ICPMS,nM,
notes,notes,unitless,
download
https://osprey.bco-dmo.org/dataset/914915/data/download
download
onLine
dataset
<p>Seawater was collected from the Bermuda Atlantic Time Series (BATS) and Hydrostation S (Hydro) sites in the Sargasso Sea in September 2018.&nbsp; Depth profile investigations at BATS were taken at 32.343⁰N 64.594⁰W at 21 separate depths between 1m and 4500m.&nbsp; Hydrostation S samples were taken at 32.165⁰N 64.501⁰W at 10 depths between 1m and 500m.&nbsp; Incubation water was taken from two depths (1m and 240m) and collected into four carboys (two euphotic (1m) and two subphotic (240m)).&nbsp; One carboy from each depth was filtered using a 0.2µm filter to remove bacteria and other biology and particles while another was left unfiltered.&nbsp; 129I (t1/2&nbsp; ~15.7 My) (Eckert and Ziegler Isotope Products ©) (Hardisty et al., 2020, Hardisty et al., 2021), was added directly to each of the carboys at a targeted concentration of ~70nM 129I- for investigating iodine redox reactions in natural seawater over time.&nbsp; 129I- was added before aliquoting the carboy water for individual incubations to ensure homogenous 129I- concentrations at t0 for all incubations.&nbsp; 200ml from each carboy were fractionated into separated incubation containers.&nbsp; Samples for t0 were immediately subsampled from spiked incubation containers, with this and subsequent (t1, t2, tf) subsamples being ~50ml.&nbsp; All subsamples were immediately filtered at 0.2µm to end interaction with biology after sampling.&nbsp; Subsamples were refrigerated and stored at 4°C until they returned to Michigan State University and were frozen for storage.</p>
<p>Five incubation factors were used to create 20 incubation trials using a ship-deck light-filtering incubator to mimic at-depth light filtration, cooled with a continuous flow of ambient surface seawater and stored in translucent and amber Nalgene bottles for dark incubations: each done in triplicate.&nbsp; Factors included: 1) filtering of samples through a 0.2µm syringe filter, meant as a control to screen filtered seawater of bacteria and macro-organisms and particles, kept in either the light or the dark depending on incubation, (Campos et al., 1996, Farrenkoph et al., 1997, Hardisty et al., 2020); 2) addition of O2•- dismutase (SOD) to incubations both filtered and unfiltered, but all left in the dark, intended as a control to remove ambient O2•- in seawater (Sutherland et al., 2020, Li et al., 2012, Diaz et al., 2013); 3) addition of superoxide thermal source (SOTS) and hydrogen peroxide (H2O2) to filtered samples kept in the dark in separate experiments, both suspected of being able to aid in oxidation of I- to IO3- in seawater, 4) unfiltered water in the dark to determine the role, if any, of photochemical reactions that may cause the reduction of IO3- to I- in the presence of organic matter (Chance et al., 2014, Spokes and Liss 1996); five additions of MnCl2 to iterations of the above in order to consider the potential of preferential Mn2+ oxidation relative to I-.&nbsp; Note that controls 2 and 5 were only relevant if I- oxidation was detected in the other controls.</p>
<p>Seawater for samples was taken from both photic (1m) and subphotic (240m) depths and collected in carboys.&nbsp; Superoxide thermal source was kept frozen (-80⁰C) until it was added by pipette to two of the incubations (11 and 19) as a combination of 1ml dimethyl sulfoxide (DMSO) + 1mg SOTS (3027.55µM SOTS) (Cayman Chemicals, CAS number 223507-96-8) at a volume targeting 10 nM O2•- (Heller and Croot, 2010).&nbsp; This was made fresh daily immediately before adding to samples and added daily to account for natural decay.&nbsp; The O2•- concentration of the SOTS stock was not analyzed but O2•- concentration was analyzed in one experiment a few hours post-SOTS addition – to allow to reach steady state concentrations – to confirm O2•- accumulation near target levels. Hydrogen peroxide (30%) was added at a volume targeting 50nM H2O2 in each solution.&nbsp; SOD was added by pipette daily – thus accounting for decay and titration via potentially newly formed O2•- within the incubations – from a stock volume of 4kU/ml to incubations to produce samples with SOD volume of 0.32kU/ml.&nbsp; Given potential long oxidation timescales of I-, all incubations were performed over a 140-hour time period, with subsamples collected for iodine species measurement at t0, ~t40, ~t88, and ~t140 hours.<br />
<br />
The concentrations of IO3- and I- from the incubations were determined at MSU after sample collection via the methods outlined by Jickells (1988) for spectrophotometry (IO3-) and by Hardisty et al., (2020) for ion exchange chromatography (I-, DOI) and ICP-MS.</p>
<p>Iodine isotope ratios were determined via the methods outlined in Hardisty et al., (2020) and Hardisty et al., (2021) using chromatographic separation and subsequent analysis via multi-collector ICP-MS (MC-ICP-MS).<br />
<br />
See the results publication Schnur et al. (2024) for more information.</p>
<p>See the related dataset "BATS/Hydrostation S: iodine speciation and superoxide concentration" (https://www.bco-dmo.org/dataset/914955) for details of the&nbsp;steady-state concentration of O2•-&nbsp;methodology.</p>
Specified by the Principal Investigator(s)
<p>Matlab was used for processing iodine isotope data.&nbsp;&nbsp; MATLAB version is R2015b (academic use).&nbsp;&nbsp;UV-Vis Analyst software Version 5.44.</p>
Specified by the Principal Investigator(s)
* Sheet name "Table 1" of file "Schnur_BATS_Supplement_Table_BCO-DMO_20230817.xlsx" was exported as csv from Excel then imported into the BCO-DMO data system as the primary table for this dataset. It will appear on this dataset as "914915_v1_iodine_and_isotopes.csv."
* Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number]
* ISO_DateTime_UTC added in ISO 8601 format using the datetime provided in time zone Bermuda/Atlantic time "AST/ADT"
* Upon request, the following columns were rounded to integer (from long decimals) iodate_ICPMS_nM, DOI_ICPMS_nM, iodide_ICPMS_nM, iodate_spec_nM
* Sheet name "Supplementary Table 4" of file "Schnur_BATS_Supplement_Table_BCO-DMO_20230817.xlsx" added as a supplemental file "ICP-MS runs blanks and yields" to this dataset.
Specified by BCO-DMO Data Managers
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
Triple Quadrupole Inductively-Coupled Plasma Mass Spectrometer
Triple Quadrupole Inductively-Coupled Plasma Mass Spectrometer
PI Supplied Instrument Name: Triple Quadrupole Inductively-Coupled Plasma Mass Spectrometer PI Supplied Instrument Description:All iodide and DOI concentrations were measured via a Triple Quadrupole Inductively-Coupled Plasma Mass Spectrometry (ICP-MS-TQ) after ion exchange chromatography with AG1-X8 resin (Hardisty 2020) was used to separate species from whole seawater samples. Instrument Name: Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:ICP Mass Spec Instrument Description: An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/
ThermoFinnigan Neptune MC-ICP-MS
ThermoFinnigan Neptune MC-ICP-MS
PI Supplied Instrument Name: ThermoFinnigan Neptune MC-ICP-MS PI Supplied Instrument Description:All iodine isotope ratios were measured on a ThermoFinnigan Neptune MC-ICP-MS at the Woods Hole Oceanographic Institute (WHOI) Plasma Facility (Hardisty et al., 2020). Instrument Name: Multi Collector Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:MC-ICPMS Instrument Description: A Multi Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) is a type of mass spectrometry where the sample is ionized in a plasma (a partially ionized gas, such as Argon, containing free electrons) that has been generated by electromagnetic induction. A series of collectors is used to detect several ion beams simultaneously.
A MC-ICPMS is a hybrid mass spectrometer that combines the advantages of an inductively coupled plasma source and the precise measurements of a magnetic sector multicollector mass spectrometer. The primary advantage of the MC-ICPMS is its ability to analyze a broader range of elements, including those with high ionization potential that are difficult to analyze by Thermal Ionization Mass Spectrometry (TIMS). The ICP source also allows flexibility in how samples are introduced to the mass spectrometer and allows the analysis of samples introduced either as an aspirated solution or as an aerosol produced by laser ablation.
VWR UV-Vis Scanning 3100 PC spectrophotometer
VWR UV-Vis Scanning 3100 PC spectrophotometer
PI Supplied Instrument Name: VWR UV-Vis Scanning 3100 PC spectrophotometer PI Supplied Instrument Description:All iodate concentrations were measured via spectrophotometery on a VWR UV-Vis Scanning 3100 PC spectrophotometer and accompanying UV-Vis Analyst software via a method outlined by Jickells (1988). Instrument Name: Spectrophotometer Instrument Short Name:Spectrophotometer Instrument Description: An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/
Cruise: AE1825
AE1825
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE1825
Rodney J. Johnson
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel