http://lod.bco-dmo.org/id/dataset/819775
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
2020-07-29
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Analytical data for the analysis of a new instrumental method for vanadium isotopic analysis
2020-07-29
publication
2020-07-29
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-08-13
publication
https://doi.org/10.26008/1912/bco-dmo.819775.1
Jeremy D. Owens
Florida State University
principalInvestigator
Sune G. Nielsen
Woods Hole Oceanographic Institution
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: Owens, J., Nielsen, S. (2020) Analytical data for the analysis of a new instrumental method for vanadium isotopic analysis. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-07-29 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.819775.1 [access date]
Analysis of high-precision vanadium isotope ratios by medium resolution MC-ICP-MS Dataset Description: <p>This dataset includes the analytical data for the analysis of a new instrumental method for vanadium isotopic analysis.</p> Methods and Sampling: <p><strong>Methodology:</strong><br />
This work uses a new mass spectrometric method using medium resolution mode (~4000) of a Thermo Scientific Neptune MC-ICP-MS. The setup presented is able to resolve all interfering molecular species in the V mass spectrum, thus removing the uncertainty of minor isotope effects from combinations of polyatomic C, N, O, S, Ar and Cl. The method utilizes high-transmission interface cones that significantly lower the amount of V required per analysis to roughly 200–300 ng, or almost an order of magnitude less than previous methods.</p>
<p>To test this we use pure vanadium solutions and analyze various instrumental settings to reproduce the known isotopic values of these solutions. Additionally, we test sulfur interferences by spiking the pure vanadium solutions with pure an elemental sulfur solution. Using this new instrumental method we test any potential S interferences. This new method will allow for more accurate and precise seawater analysis.</p>
<p><strong>Sampling and analytical procedures:</strong><br />
Vanadium isotope compositions are measured using a Thermo Scientific Neptune MC-ICP-MS. The front-end is configured with a 'Jet' sampler cone and an 'X'-type skimmer cone in order to obtain the highest possible V transmission efficiency. Vanadium is introduced into the mass spectrometer as a dry aerosol by passing the sample through a CETAC Aridus II desolvator, which is fed by an ESI perfluoroalkoxy alkane (PFA) nebulizer that aspirates the sample solution at ~120 ml per minute. This configuration routinely produces a vanadium ion beam of ~2.5 nA for a solution containing 1 mg per g vanadium when the mass spectrometer is operated in medium resolution, equivalent to a total ion transmission of ~0.7‰.</p>
<p>The masses 48 through 53 are collected simultaneously using the L2, L1, Center, H1, H2 and H3 collectors. The Center cup was equipped with a 10¹² Ω resistor, H1 is equipped with a 10¹¹ Ω resistor, while the rest of the collectors are connected to standard 10¹¹ Ω resistors. Each sample analysis consists of 30 s background that is measured by defocusing and deflecting the ion beam away from the detectors in the electrostatic analyzer, followed by 40 cycles of 4.194 s integrations. Correction for interferences on ⁵⁰V from ⁵⁰Ti and ⁵⁰Cr that cannot be resolved in medium resolution (nor high resolution) mode are performed as outlined in Nielsen et al. 2011. Each sample is bracketed by four (two on each side) measurements of the Alfa Aesar (AA-V) standard that has been defined as δ⁵¹V = 0 (where δ⁵¹V = 1,000 × [(⁵¹V/⁵⁰Vsample - ⁵¹V/⁵⁰VAA-V)/⁵¹V/⁵⁰VAA-V]). In addition, each sample measurement is bracketed by two measurements of the bracketing standard BDH vanadium solution that has an isotope composition of δ⁵¹V = ~1.19 ±0.12 (2sd) (Nielsen et al., 2011).</p>
<p>Methods for V isotope analysis are published in Nielsen et al., 2016 (doi: <a href="http://dx.doi.org/10.1039/C5JA00397K" target="_blank">10.1039/C5JA00397K</a>).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1434785 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1434785
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1624895 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1624895
completed
Jeremy D. Owens
Florida State University
850-644-5018
1800 E. Paul Dirac Drive
Tallahassee
FL
32310
USA
jdowens@fsu.edu
pointOfContact
Sune G. Nielsen
Woods Hole Oceanographic Institution
CRPG, CNRS, Université de Lorraine 15 rue Notre Dame des Pauvres
54501 Vandoeuvre lès Nancy
France
sune.nielsen@univ-lorraine.fr
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Sample
Current_51V_voltage
Measured_d51V
two_sd
n
Actual_d51V
Thermo Neptune multi-collector ICP-MS
theme
None, User defined
sample identification
No BCO-DMO term
Vanadium
numb_obs
featureType
BCO-DMO Standard Parameters
Inductively Coupled Plasma Mass Spectrometer
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.
Fingerprinting and Calibrating Low Oxygen Conditions Using Vanadium Isotopes
https://osprey.bco-dmo.org/project/775701
Fingerprinting and Calibrating Low Oxygen Conditions Using Vanadium Isotopes
<p><em>NSF Award Abstract:</em><br />
Discovering, testing, and developing chemical proxies (relic materials) in marine sediments that reveal how strongly or weakly oxidizing near-surface environmental conditions were in the Earth's geological past are immensely important for understanding interactions between ocean chemistry, biological evolution and extinctions, and climate. To date scientists do not have a proxy for low but non-zero oxygen conditions -- the sort of conditions that are likely to have dominated in biologically important periods of Earth history. In this project, researchers will study the relationship between bottom water oxygen concentration and the isotopes of the trace metal vanadium (V) in a range of oxygen conditions in the modern ocean. Based on pilot data, theoretical calculations and dissolved seawater V concentrations they believe that stable V isotope ratios of core top sediments will correlate systematically over a range of bottom water oxygen conditions. By analyzing these materials, the research team expects to establish the relationship between V isotopes and bottom water oxygen concentrations. Given the importance of chemical proxies to quantify past climate change, the results of this study will be of great importance to the modern and paleoceanographic community, as well as for modelers to better understand a broad range of oxygen variability in Earth history.</p>
<p>Although recent investigations have provided a wealth of information about the redox conditions of the ancient oceans, there is a significant gap in understanding low oxygen conditions throughout Earth history. Therefore, it is important to develop new paleoredox proxies that can provide additional and complementary knowledge about ocean redox conditions during these important periods of Earth history. In this study, scientists will analyze bulk sediments and their organic and ferromanganese mineral fractions to investigate the V isotopic variability within the various sedimentary components. (These samples comprise organic rich to ferromanganese rich sediments due to a range in bottom water oxygen concentrations.) Reconstructing marine low oxygen conditions using vanadium isotopes would fill a void in the paleoredox proxy toolbox. Developing, calibrating, and fingerprinting the V isotopic variability in modern sediments is required to be able to apply vanadium isotopes as an accurate paleoredox proxy.</p>
Vanadium Isotopes
largerWorkCitation
project
eng; USA
oceans
2020-07-29
0
BCO-DMO catalogue of parameters from Analytical data for the analysis of a new instrumental method for vanadium isotopic analysis
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/819787.rdf
Name: Sample
Units: unitless
Description: <p>Sample name</p>
http://lod.bco-dmo.org/id/dataset-parameter/819788.rdf
Name: Current_51V_voltage
Units: volts
Description: <p>Signal intensity</p>
http://lod.bco-dmo.org/id/dataset-parameter/819789.rdf
Name: Measured_d51V
Units: per mil (‰)
Description: <p>Measured V isotope</p>
http://lod.bco-dmo.org/id/dataset-parameter/819790.rdf
Name: two_sd
Units: per mil (‰)
Description: <p>2 standard deviation error from all analyses</p>
http://lod.bco-dmo.org/id/dataset-parameter/819791.rdf
Name: n
Units: unitless
Description: <p>Number of analyses</p>
http://lod.bco-dmo.org/id/dataset-parameter/819792.rdf
Name: Actual_d51V
Units: per mil (‰)
Description: <p>Reported value using previous methods</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
292
https://darchive.mblwhoilibrary.org/bitstream/1912/26069/1/dataset-819775_vanadium-isotopes__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.819775.1
download
onLine
dataset
<p><strong>Methodology:</strong><br />
This work uses a new mass spectrometric method using medium resolution mode (~4000) of a Thermo Scientific Neptune MC-ICP-MS. The setup presented is able to resolve all interfering molecular species in the V mass spectrum, thus removing the uncertainty of minor isotope effects from combinations of polyatomic C, N, O, S, Ar and Cl. The method utilizes high-transmission interface cones that significantly lower the amount of V required per analysis to roughly 200–300 ng, or almost an order of magnitude less than previous methods.</p>
<p>To test this we use pure vanadium solutions and analyze various instrumental settings to reproduce the known isotopic values of these solutions. Additionally, we test sulfur interferences by spiking the pure vanadium solutions with pure an elemental sulfur solution. Using this new instrumental method we test any potential S interferences. This new method will allow for more accurate and precise seawater analysis.</p>
<p><strong>Sampling and analytical procedures:</strong><br />
Vanadium isotope compositions are measured using a Thermo Scientific Neptune MC-ICP-MS. The front-end is configured with a 'Jet' sampler cone and an 'X'-type skimmer cone in order to obtain the highest possible V transmission efficiency. Vanadium is introduced into the mass spectrometer as a dry aerosol by passing the sample through a CETAC Aridus II desolvator, which is fed by an ESI perfluoroalkoxy alkane (PFA) nebulizer that aspirates the sample solution at ~120 ml per minute. This configuration routinely produces a vanadium ion beam of ~2.5 nA for a solution containing 1 mg per g vanadium when the mass spectrometer is operated in medium resolution, equivalent to a total ion transmission of ~0.7‰.</p>
<p>The masses 48 through 53 are collected simultaneously using the L2, L1, Center, H1, H2 and H3 collectors. The Center cup was equipped with a 10¹² Ω resistor, H1 is equipped with a 10¹¹ Ω resistor, while the rest of the collectors are connected to standard 10¹¹ Ω resistors. Each sample analysis consists of 30 s background that is measured by defocusing and deflecting the ion beam away from the detectors in the electrostatic analyzer, followed by 40 cycles of 4.194 s integrations. Correction for interferences on ⁵⁰V from ⁵⁰Ti and ⁵⁰Cr that cannot be resolved in medium resolution (nor high resolution) mode are performed as outlined in Nielsen et al. 2011. Each sample is bracketed by four (two on each side) measurements of the Alfa Aesar (AA-V) standard that has been defined as δ⁵¹V = 0 (where δ⁵¹V = 1,000 × [(⁵¹V/⁵⁰Vsample - ⁵¹V/⁵⁰VAA-V)/⁵¹V/⁵⁰VAA-V]). In addition, each sample measurement is bracketed by two measurements of the bracketing standard BDH vanadium solution that has an isotope composition of δ⁵¹V = ~1.19 ±0.12 (2sd) (Nielsen et al., 2011).</p>
<p>Methods for V isotope analysis are published in Nielsen et al., 2016 (doi: <a href="http://dx.doi.org/10.1039/C5JA00397K" target="_blank">10.1039/C5JA00397K</a>).</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong><br />
This was a methods paper using new instrumental settings and to resolve issues with sulfur interferences, thus all solutions were pure vanadium solutions and did not contain any issues. However, we checked for any potential titanium and chromium intereferences and potential effects on the V isotope data using the previously published methods of Nielsen et al., 2011 (doi: <a href="http://dx.doi.org/10.1111/j.1751-908X.2011.00106.x" target="_blank">10.1111/j.1751-908X.2011.00106.x</a>).</p>
<p><strong>BCO-DMO Processing:</strong><br />
- modified parameter names.</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
Thermo Neptune multi-collector ICP-MS
Thermo Neptune multi-collector ICP-MS
PI Supplied Instrument Name: Thermo Neptune multi-collector ICP-MS 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/