Target alkane and aromatic concentrations for sediment samples collected in southeastern Louisiana inland and coastal marshes from 2015-02-07 to 2018-06-27

Coastal Waters Consortium III (CWC III)

DOI:
10.7266/n7-tph2-3e25
 
UDI:
R6.x808.000:0042
Last Update:
May 31 2019 15:27 UTC
 
Dataset Author(s):
Overton, Edward
Point of Contact:
Overton, Edward
Louisiana State University / Department of Environmental Sciences
School of the Coast and Environment 1271 Energy, Coast and Environment Building
Baton Rouge, Louisiana  70803
USA
ebovert@lsu.edu
Funding Source:
RFP-VI
Data Collection Period:
2015-02-07 to 2018-06-27

Identified Submitted In-Review Available
3 3 3 3

Suggested Citation:

Overton, Edward (2018) Target alkane and aromatic concentrations for sediment samples collected in southeastern Louisiana inland and coastal marshes from 2015-02-07 to 2018-06-27. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University-Corpus Christi. doi:10.7266/n7-tph2-3e25

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.

Theme Keywords:

gas chromatography, mass spectrometry, aromatics, alkanes, surface sediments, coastal marshes

File Format:

xlsx

Filename:

R6.x808.000-0042_2015-2018_sub2.zip (1.71 MB)

Dataset Downloads:

2

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 Information
Distribution Information
Metadata 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
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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 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Point: gml:pos: 29.451417 -89.768243 gml:pointMember: Point: gml:pos: 29.443867 -89.752935 gml:pointMember: Point: gml:pos: 29.438683 -89.768593 gml:pointMember: Point: gml:pos: 29.437183 -89.784923 gml:pointMember: Point: gml:pos: 29.425733 -89.786088 gml:pointMember: Point: gml:pos: 29.44325 -89.73509 gml:pointMember: Point: gml:pos: 29.45115 -89.753937 gml:pointMember: Point: gml:pos: 29.45525 -89.751964 gml:pointMember: Point: gml:pos: 29.46 -89.752824 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
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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
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