Target alkane and aromatic concentrations for sediment samples collected in southeastern Louisiana inland and coastal marshes from 2015-02-07 to 2018-06-27
Identification InformationDistribution InformationMetadata Maintenance Information
Metadata:
File identifier:
R6.x808.000-0042-metadata.xml
Language:
eng; USA
Character set:
Character set code:
utf8
Hierarchy level:
Scope code:
dataset
Metadata author:
Responsible party:
Individual name:
Jason Weick
Organisation name:
Louisiana Universities Marine Consortium (LUMCON) / Data Management
Position name:
IT Manager
Contact info:
Contact:
Phone:
Telephone:
Voice:
9858512827
Facsimile:
Address:
Address:
Delivery point:
8124 Highway 56
City:
Chauvin
Administrative area:
Louisiana
Postal code:
70344
Country:
USA
Electronic mail address:
jweick@lumcon.edu
Role:
Role code:
pointOfContact
Date stamp:
2019-07-09T21:15:57+00:00
Metadata standard name:
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
Metadata standard version:
ISO 19115-2:2009(E)
Dataset URI:
https://data.gulfresearchinitiative.org/metadata/R6.x808.000:0042
Return To Index
Identification info:
Data identification:
Citation:
Citation:
Title:
Target alkane and aromatic concentrations for sediment samples collected in southeastern Louisiana inland
and coastal marshes from 2015-02-07 to 2018-06-27
Alternate title:
Date:
Date:
Date:
2018-12-19
Date type:
Date type code:
creation
Abstract:
This dataset reports gas chromatography/mass spectrometry (GC/MS) analytical results of sediment samples
collected by Coastal Waters Consortium (CWC) researchers in southeastern Louisiana inland and coastal
marshes 2015-02-07 to 2018-06-27. It contains a master file containing all sediment sample collection
information and total target alkane and aromatic concentrations for each sample and seven excel files
(organized by Principal Investigator) that provide individual concentrations of target alkane and aromatic
analytes for all sediment samples listed in the master file.
Purpose:
In support of the Coastal Waters Consortium's effort to assess the chemical evolution, biological degradation,
and environmental stresses of petroleum and dispersant within Gulf of Mexico coastal and shelf ecosystems.
Status:
Progress code:
completed
Point of contact:
Responsible party:
Individual name:
Edward Overton
Organisation name:
Louisiana State University / Department of Environmental Sciences
Position name:
Emeritus Professor
Contact info:
Contact:
Phone:
Telephone:
Voice:
2255788634
Facsimile:
Address:
Address:
Delivery point:
School of the Coast and Environment
1271 Energy, Coast and Environment Building
City:
Baton Rouge
Administrative area:
Louisiana
Postal code:
70803
Country:
USA
Electronic mail address:
ebovert@lsu.edu
Role:
Role code:
principalInvestigator
Descriptive keywords:
Keywords:
Keyword:
gas chromatography
Keyword:
mass spectrometry
Keyword:
aromatics
Keyword:
alkanes
Keyword:
surface sediments
Keyword:
coastal marshes
Type:
Keyword type code:
theme
Descriptive keywords:
Keywords:
Keyword:
Louisiana
Keyword:
Gulf of Mexico
Type:
Keyword type code:
place
Language:
eng; USA
Topic category:
Topic category code:
environment
Extent:
Extent:
Geographic element:
Geographic bounding box:
West bound longitude:
-90.759109
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Temporal element:
Temporal extent:
Extent:
Time period:
Description:
ground condition
Begin date:
2015-02-07
End date:
2018-06-27
Supplemental Information:
File: R6.x808.000-0042_Master_Sediment_2015-2018_sub1.xlsx: LSU/RCAT ID# (Internal sample identifier assigned
by the analytical lab), Date Sample Collected (MM/DD/YYYY), Date Sample Received in Analytical Lab
(MM/DD/YYYY), Date Sample Extracted by Analytical Lab (MM/DD/YYYY), Date Sample Analyzed (MM/DD/YYYY),
Extraction Method: (Extraction method used on the sample; “Wet, PSE”), Latitude (decimal degrees), Longitude
(decimal degrees), Total Alkanes (µg/L), Total Aromatics (ng/L), Macondo Biomarker Pattern: (A, B, AB are
all indicative of relatively fresh to weathered MC252 oil; If field is blank, no biomarker pattern was
detected), Principal Investigator (CWC Principal Investigator by which or for which the sample was
collected), Sample Description (user-defined descriptor for sample), Sample Collection Depth (cm; Target
depth for sediment sample collection for oil analysis), Concentration Workbook Filename (file with
individual targeted alkane and aromatic analyte concentration data). N/A in any cell of the worksheet
indicates the information was not available or not applicable. Samples with two extraction dates indicate
samples that sat too long in the refrigerator prior to extraction, becoming contaminated. These samples were
re-extracted on second indicated date and re-analyzed.
Folder R6.x808.000-0042_Concentration_Workbooks_Sediment_2015-2018: contains seven excel files that provide
individual targeted alkane and aromatic analyte concentrations for all sediment samples listed in
R6.x808.000-0042_Master_Sediment_2015-2018_sub1.xlsx. Data is organized by CWC Principal Investigator.
Within each file, samples are grouped by LSU/RCAT ID# on different worksheets according to run batches (in
other words, sequentially numbered batches of samples are on one worksheet tab). Format and Data Parameters
and Units are the same for all files: LSU/RCAT ID# (Internal sample identifier assigned by the analytical
lab), Field ID# (user-defined descriptor for sample), Initial Sediment Wt (mg; weight of sample extracted),
Final Extract Volume (µl; volume of extracted sample after concentration), Percent Moisture (%; Percentage
of water in each sediment sample), Surrogate Corrected values for 28 alkane analytes (ug/g; Alkane
concentrations, including two isoprenoids, after applying surrogate recovery or extraction efficiency
value), Surrogate Corrected values for 43 aromatic analytes (ng/g; Aromatic concentrations for parent
aromatic compounds and alkyl homologs after applying surrogate recovery or extraction efficiency value, C30
17α,21β-Hopane (ng/g; the concentration of C30 17α,21β-Hopane (if present) in the sample, providing the
option of hopane normalization of data). Elemental Sulphur Interference: Interference from elemental sulfur
is reported in some of the raw data (highlighted in blue-colored cells). It is visually evident in the
chromatograms and affects the integration of some analytes (mainly C-2 fluorenes, C-3 DBTs, and C-1
phenanthrenes) and in most cases, the interference prevents the integration of those compounds, so they are
often 0.000. Other chromatographic interference: Chromatographic interference occurred in a few samples and
is reported in the raw data (highlighted in brown-colored cells). Unlike the elemental sulfur interference,
a source for this interference could not be identified.|GC/MS-SIM Sediment extraction (modified EPA SW-846
method 3545A): Wet, PSE=approximately 10 grams of sample was centrifuged to remove excess water that was
decanted and centrifuged sample was extracted by pressurized solvent extraction (SW-846 3545A) Qualitative
oil source-fingerprinting (ASTM D5739-00).|Pressurized solvent extractor GC/MS.|Surface samples were
collected at approximately 5cm depth. Core samples were collected at the depths indicated in the Sample
Collection Depth (cm) field in the dataset R6.x808.000-0042_Master_Sediment_2015-2018_sub1.xlsx.|The Overton
lab provided sample collection and storage guidelines to all coPI's. Data quality could be affected if these
guidelines were not followed. Quality control samples were analyzed with each analytical sample sequence.
These QC samples had to be within ±20% of the original calibration values. Extraction efficiency was
evaluated based on the percent recovery of the surrogate standard added to each sample prior to extraction.
The acceptable recovery range was 70-120%. Method blanks were also extracted and quantitated every 12
samples. Any alkanes and aromatics detected in the method blanks were surrogate corrected, averaged if
multiple blanks were prepared for each sample batch, and subtracted out of the surrogate corrected
concentrations of alkanes and aromatics in each sediment sample. At least one laboratory duplicate was
prepared and extracted for each sediment sample batch.|
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Distribution info:
Distribution:
Distributor:
Distributor:
Distributor contact:
Responsible party:
Organisation name:
Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC)
Contact info:
Contact:
Phone:
Telephone:
Voice:
3618253604
Address:
Address:
Delivery point:
6300 Ocean Drive
City:
Corpus Christi
Administrative area:
TX
Postal code:
78412
Country:
USA
Electronic mail address:
griidc@gomri.org
Online Resource:
Online Resource:
Linkage:
URL:
https://data.gulfresearchinitiative.org
Role:
Role code:
distributor
Distributor format:
Format:
Name:
xlsx
Version:
inapplicable
File decompression technique:
zip
Distributor transfer options:
Digital transfer options:
Transfer size:
1.7092
Online:
Online Resource:
Linkage:
URL:
https://data.gulfresearchinitiative.org/data/R6.x808.000:0042
Protocol:
https
Name:
Data Landing Page
Description:
GRIIDC dataset landing page
Function:
Online function code:
information
Return To Index
Metadata maintenance:
Maintenance information:
Maintenance and update frequency:
unknown
Maintenance note:
This ISO metadata record was automatically generated from information provided to GRIIDC for dataset:
R6.x808.000:0042 on 2019-12-06T02:01:42-06:00
Return To Index
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<gco:CharacterString>File: R6.x808.000-0042_Master_Sediment_2015-2018_sub1.xlsx: LSU/RCAT ID# (Internal sample identifier assigned by the analytical lab), Date Sample Collected (MM/DD/YYYY), Date Sample Received in Analytical Lab (MM/DD/YYYY), Date Sample Extracted by Analytical Lab (MM/DD/YYYY), Date Sample Analyzed (MM/DD/YYYY), Extraction Method: (Extraction method used on the sample; “Wet, PSE”), Latitude (decimal degrees), Longitude (decimal degrees), Total Alkanes (µg/L), Total Aromatics (ng/L), Macondo Biomarker Pattern: (A, B, AB are all indicative of relatively fresh to weathered MC252 oil; If field is blank, no biomarker pattern was detected), Principal Investigator (CWC Principal Investigator by which or for which the sample was collected), Sample Description (user-defined descriptor for sample), Sample Collection Depth (cm; Target depth for sediment sample collection for oil analysis), Concentration Workbook Filename (file with individual targeted alkane and aromatic analyte concentration data). N/A in any cell of the worksheet indicates the information was not available or not applicable. Samples with two extraction dates indicate samples that sat too long in the refrigerator prior to extraction, becoming contaminated. These samples were re-extracted on second indicated date and re-analyzed.
Folder R6.x808.000-0042_Concentration_Workbooks_Sediment_2015-2018: contains seven excel files that provide individual targeted alkane and aromatic analyte concentrations for all sediment samples listed in R6.x808.000-0042_Master_Sediment_2015-2018_sub1.xlsx. Data is organized by CWC Principal Investigator. Within each file, samples are grouped by LSU/RCAT ID# on different worksheets according to run batches (in other words, sequentially numbered batches of samples are on one worksheet tab). Format and Data Parameters and Units are the same for all files: LSU/RCAT ID# (Internal sample identifier assigned by the analytical lab), Field ID# (user-defined descriptor for sample), Initial Sediment Wt (mg; weight of sample extracted), Final Extract Volume (µl; volume of extracted sample after concentration), Percent Moisture (%; Percentage of water in each sediment sample), Surrogate Corrected values for 28 alkane analytes (ug/g; Alkane concentrations, including two isoprenoids, after applying surrogate recovery or extraction efficiency value), Surrogate Corrected values for 43 aromatic analytes (ng/g; Aromatic concentrations for parent aromatic compounds and alkyl homologs after applying surrogate recovery or extraction efficiency value, C30 17α,21β-Hopane (ng/g; the concentration of C30 17α,21β-Hopane (if present) in the sample, providing the option of hopane normalization of data). Elemental Sulphur Interference: Interference from elemental sulfur is reported in some of the raw data (highlighted in blue-colored cells). It is visually evident in the chromatograms and affects the integration of some analytes (mainly C-2 fluorenes, C-3 DBTs, and C-1 phenanthrenes) and in most cases, the interference prevents the integration of those compounds, so they are often 0.000. Other chromatographic interference: Chromatographic interference occurred in a few samples and is reported in the raw data (highlighted in brown-colored cells). Unlike the elemental sulfur interference, a source for this interference could not be identified.|GC/MS-SIM Sediment extraction (modified EPA SW-846 method 3545A): Wet, PSE=approximately 10 grams of sample was centrifuged to remove excess water that was decanted and centrifuged sample was extracted by pressurized solvent extraction (SW-846 3545A) Qualitative oil source-fingerprinting (ASTM D5739-00).|Pressurized solvent extractor GC/MS.|Surface samples were collected at approximately 5cm depth. Core samples were collected at the depths indicated in the Sample Collection Depth (cm) field in the dataset R6.x808.000-0042_Master_Sediment_2015-2018_sub1.xlsx.|The Overton lab provided sample collection and storage guidelines to all coPI's. Data quality could be affected if these guidelines were not followed. Quality control samples were analyzed with each analytical sample sequence. These QC samples had to be within ±20% of the original calibration values. Extraction efficiency was evaluated based on the percent recovery of the surrogate standard added to each sample prior to extraction. The acceptable recovery range was 70-120%. Method blanks were also extracted and quantitated every 12 samples. Any alkanes and aromatics detected in the method blanks were surrogate corrected, averaged if multiple blanks were prepared for each sample batch, and subtracted out of the surrogate corrected concentrations of alkanes and aromatics in each sediment sample. At least one laboratory duplicate was prepared and extracted for each sediment sample batch.|</gco:CharacterString>
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