Dataset: Dissolved Trace Metals

Name: Concentrations of total dissolved trace metals (Fe, Mn, Zn, Ni, Cd) obtained using seaFAST preconcentration and ICP-MS from the R/V Kilo Moana cruise KM1128 in the Central Pacific Ocean in October 2011
Published: 2021-07-09
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.836347.2

Spatial Extent: N:17 E:-154.4 S:-15 W:-174.5

Temporal Extent: 2011-10-03 - 2011-10-24

Project:

Connecting Trace Elements and Metalloenzymes Across Marine Biogeochemical Gradients (GPc03) (MetZyme)

Program:

U.S. GEOTRACES (U.S. GEOTRACES)

Principal Investigator:

Mak A. Saito (Woods Hole Oceanographic Institution, WHOI)

Co-Principal Investigator:

Natalie Cohen (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2021-07-09

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Concentrations of total dissolved trace metals (Fe, Mn, Zn, Ni, Cd) obtained using seaFAST preconcentration and ICP-MS from the R/V Kilo Moana cruise KM1128 in the Central Pacific Ocean in October 2011

Abstract:

Concentrations of total dissolved trace metals (Fe, Mn, Zn, Ni, Cd) obtained using seaFAST preconcentration and ICP-MS from the R/V Kilo Moana cruise KM1128.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2021-07-09	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.836347.2	2021-07-09
2021-01-15	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.836347.1	2021-01-15

Methods & Sampling

Seawater sampling occurred during October 1-25 2011 onboard the R/V Kilo Moana during the METZYME expedition (Saito et al., 2014). Seawater samples for trace metal analyses were collected using a trace metal clean rosette consisting of X-Niskins on a trace metal clean (Amsteel) winch line. Following seawater collection, X-Niskins were brought into a fabricated shipboard class-100 clean room and pressurized with filtered high purity nitrogen gas. Seawater was filtered through 47mm 0.2 µm Supor membranes to remove the particulate fraction.

METZYME seawater was acidified to pH 1.8 using hydrochloric acid (Optima grade, Fisher Chemical). Seawater preconcentration was performed using an automated solid phase extraction system, seaFAST pico, run in offline concentration mode. Following offline seaFAST preconcentration, the multi-element quantitative analysis was performed using an iCAP Q inductively coupled plasma-mass spectrometer (ICP-MS) (Thermo Scientific). Concentrations of Fe, Mn, Zn Ni and Cd were determined using a six-point external standard curve with a multi-element standard (SPEX CertiPrep), diluted to range from 1-10 ppb in 5% nitric acid. Indium standards (SPEX CertiPrep) were similarly added to these standard stocks, diluted to 1, 2, 3, 4 and 10ppb. Instrument injection blanks consisted of 5% nitric acid in Milli-Q. Standard curve R² values were ≥0.98 for the metals monitored.

Data Processing Description

Quality flags follow the SeaDataNet schem as per the GEOTRACES recommendations: https://www.geotraces.org/geotraces-quality-flag-policy/

Flag definitions:
1 = good quality;
2 = probably good;
3 = probably bad;
4 = bad;
6 = below detection;
9 = missing data.

BCO-DMO Processing:
- renamed fields;
- added date/time fields in ISO8601 format;
- formatted flag columns as integers;
- replaced values of 0.00 with 'nd' for sample 1226558 because it was not run (quality flag of 9).
Version history:
- 2021-07-09 (v2; current) - published version 2, which includes corrections to data and flags.
- 2021-01-15 (v2) - version 1 published.

Data Files

File
dissolved_trace_metals.csv (Comma Separated Values (.csv), 41.14 KB) MD5:213c32a9f55879cdbe0ab792f01be5a3 Primary data file for dataset ID 836347

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1031271

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
KM1128	GPc03 MetZyme	2011-10-01	R/V Kilo Moana	Carl Lamborg (Chief Scientist) Mak A. Saito (Co-Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE SEACAT 19plus

Supplied Description:

Temperature, oxygen and conductivity sensor data were collected using a SBE19plusV2 system (Seabird Electronics Inc.) attached to a CTD extension stand on the Trace Metal Rosette

Instrument Type

Generic Name: CTD Sea-Bird SBE SEACAT 19plus

Acronym: Sea-Bird SEACAT 19 Plus

Generic Description:

Self contained self powered CTD profiler. Measures conductivity, temperature and pressure in both profiling (samples at 4 scans/sec) and moored (sample rates of once every 5 seconds to once every 9 hours) mode. Available in plastic or titanium housing with depth ranges of 600m and 7000m respectively. Minature submersible pump provides water to conductivity cell.

Inductively Coupled Plasma Mass Spectrometer

Supplied Name: Thermo iCAP Q ICP-MS

Supplied Description:

Instrument Type

Generic Name: Inductively Coupled Plasma Mass Spectrometer

Acronym: ICP Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/

Generic 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.

Niskin bottle

Supplied Description:

Dissolved trace metal samples were collected by an internally programmed standard SBE Rosette (Seabird Electronics Inc.) user-modified to serve as a trace metal clean system with 24 8 L X-Niskin bottles (Ocean Test Equipment).

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

SeaFAST Automated Preconcentration System

Supplied Name: seaFAST Pico

Supplied Description:

Seawater preconcentration was performed using an automated solid phase extraction system, seaFAST pico, run in offline concentration mode.

Instrument Type

Generic Name: SeaFAST Automated Preconcentration System

Generic Description:

The seaFAST is an automated sample introduction system for analysis of seawater and other high matrix samples for analyses by ICPMS (Inductively Coupled Plasma Mass Spectrometry).

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Station_ID	Station identifier	unitless	station
Start_Date_UTC	Date at start of sample collection; format: MM/DD/YYYY Format: %m/%d/%Y	unitless	date
Start_Time_UTC	Time (UTC) at start of sample collection; format: hh:mm Format: %H:%M	unitless	time
Start_ISO_DateTime_UTC	Date and time (UTC) at start of sample collection formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
End_Date_UTC	Date at end of sample collection; format: MM/DD/YYYY Format: %m/%d/%Y	unitless	date
End_Time_UTC	Time (UTC) at end of sample collection; format: hh:mm Format: %H:%M	unitless	time
End_ISO_DateTime_UTC	Date and time (UTC) at end of sample collection formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
Start_Latitude	Latitude at start of sampling event	degrees North	lat
Start_Longitude	Longitude at start of sampling event	degrees East	lon
End_Latitude	Latitude at end of sampling event	degrees North	lat
End_Longitude	Longitude at end of sampling event	degrees East	lon
Event_ID	Event number	unitless	event
Sample_ID	Sample number	unitless	sample
Sample_Depth	Sample depth	meters (m)	depth
Mn_D_CONC_BOTTLE_czyiap	Total dissolved Mn concentration	nanomoles per kilogram (nmol/kg)	Mn
SD1_Mn_D_CONC_BOTTLE_czyiap	One standard deviation of Mn_D_CONC_BOTTLE_czyiap	nanomoles per kilogram (nmol/kg)	Mn
Flag_Mn_D_CONC_BOTTLE_czyiap	Quality flag for Mn_D_CONC_BOTTLE_czyiap	unitless	q_flag
Ni_D_CONC_BOTTLE_6xcczg	Total dissolved Ni concentration	nanomoles per kilogram (nmol/kg)	Ni
SD1_Ni_D_CONC_BOTTLE_6xcczg	One standard deviation of Ni_D_CONC_BOTTLE_6xcczg	nanomoles per kilogram (nmol/kg)	Ni
Flag_Ni_D_CONC_BOTTLE_6xcczg	Quality flag for Ni_D_CONC_BOTTLE_6xcczg	unitless	q_flag
Zn_D_CONC_BOTTLE_6qkiaq	Total dissolved Zn concentration	nanomoles per kilogram (nmol/kg)	Zn
SD1_Zn_D_CONC_BOTTLE_6qkiaq	One standard deviation of Zn_D_CONC_BOTTLE_6qkiaq	nanomoles per kilogram (nmol/kg)	Zn
Flag_Zn_D_CONC_BOTTLE_6qkiaq	Quality flag for Zn_D_CONC_BOTTLE_6qkiaq	unitless	q_flag
Cd_D_CONC_BOTTLE_zlf6jp	Total dissolved Cd concentration	nanomoles per kilogram (nmol/kg)	Cd
SD1_Cd_D_CONC_BOTTLE_zlf6jp	One standard deviation of Cd_D_CONC_BOTTLE_zlf6jp	nanomoles per kilogram (nmol/kg)	Cd
Flag_Cd_D_CONC_BOTTLE_zlf6jp	Quality flag for Cd_D_CONC_BOTTLE_zlf6jp	unitless	q_flag
Fe_D_CONC_BOTTLE_hphsej	Total dissolved Fe concentration	nanomoles per kilogram (nmol/kg)	Fe
SD1_Fe_D_CONC_BOTTLE_hphsej	One standard deviation of Fe_D_CONC_BOTTLE_hphsej	nanomoles per kilogram (nmol/kg)	Fe
Flag_Fe_D_CONC_BOTTLE_hphsej	Quality flag for Fe_D_CONC_BOTTLE_hphsej	unitless	q_flag

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Database

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Dataset: Dissolved Trace Metals