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Arctic LTER Database
Arctic LTER Database
Acceptance and utilization of LTER data requires that:
(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:
Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543
Older Metadata: Attribute table not in XML (EML) file
| Dataset URLs: | METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data |
| Dataset ID: | 99e4ions |
| Dataset Title: | Measurements of Alkalinity, calcium, magnesium, sodium, potassium, sulfate, and chloride for lake E4 during the summer of 1999 , Arctic LTER 1999. |
| Investigator 1: | |
| First Name: | Anne | | Last Name: | Giblin | | Address line 1: | | | Address line 2: | | | Address line 3: | | | City: | | | State: | | | Zip Code: | | | Country: | | | Associate Investigators: | Neil Bettez, Jennifer Wasik |
| Keywords: | Alkalinity, Cations, Anions, Calcium, magnesium, sodium, potassium, sulfate, chloride. |
| Abstract: |
Measurements of Alkalinity, calcium,
magnesium, sodium, potassium, sulfate, and chloride for lake E4 during the
summer of 1999 |
| Contact: |
Arctic LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7496
Email: arc_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/ARC/ |
| DATA FILE INFORMATION: |
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| Data File Name |
99e4ions |
| Beginning Date |
5/1/1999 |
| End Date |
9/1/1999 |
| Number of Data Records |
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| Other Files to Reference |
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| Availability Status |
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| Quality Control Information |
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| Maintenance Description |
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| Log of Changes: |
Log of changes:
Anion samples were re run in Jan of 1999 on a
Dionex DX 20 ion chromatograph and values from the Dionex 2000 were replaced.
For Archival Use:
DATE RECEIVED: Jan 20, 2000
DATA FILE ENTERED BY: Neil Bettez
DATA FILE VALIDATION: Neil Bettez
NAME: Neil Bettez
DATE: Jan 20, 2000 |
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| RESEARCH LOCATION: |
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| Geographic Description |
Lake E4 |
| Location Bounding Box |
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| West Bounding Coordinate |
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| East Bounding Coordinate |
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| North Bounding Coordinate |
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| South Bounding Coordinate |
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| OR if single point location |
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| Latitude |
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| Longitude |
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| TAXONOMIC COVERAGE: |
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| Organisms studied |
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| Methods: |
Water samples were collected and filtered through a 25mm GFF glass fiber
filter. Cation samples are stored at 4 C in 60 ml HDPE bottles and are
preserved by acidifying to ~ pH 2 (100 ul Ultrex HCL / 60 ml sample. Anion
samples are stored at 4 C in 30 HDPE bottles.
Alkalinity was measured using a Gran titration (Strum and Morgan, 1984).
Cation samples are run on a Perkin Elmer atomic absorption spectrophotometer.
Chemical interference in flame AAS originates during dissociation of the analyte
in the flame cell forming a compound that volatilizes at a different rate than
the standard. One method of alleviating this type of interference is through
the addition of a releasing agent or protective chelate. A releasing agent is
a metal or salt that forms a more stable compound with the interferent than the
analyte. For calcium analysis the addition of lanthanum, which acts a releasing
agent and reduces interference with the calcium peak from Al, Si, PO43-, and
SO42- is required (Rains, 1984). Lanthanum Chloride (LaCL3 FW 371.38) should be
added to a 1% final concentration to all samples and standards. 10% LaCL3 =
37.13 g / liter. Anions samples were run on a Dionex DX 20 liquid
chromatographer.
Reference Citations: Rains, Theodore, C. 1984. Atomic Absorption Spectrometry. Water
Analysis, Vol II Edited by Roger A. Minear and Lawrence H. Keith.
Stumm, W. &J. J. Morgan 1981. Aquatic Chemistry , 2nd edition. John Wiley &
Sons, New York, 780 pp.
USEPA, 1974. Methods for Chemical analysis of water and wastes. USEPA
Washington DC.
Sampling Description.
None |
Data Table
Variable Variable descrip. Precis./Units Coded Missing
(Y/N) Values
Site code site code y
Lake Lake n
Depth Depth meters n
Date Date DD-MMM-YY n
Alk Alkalinity m eqiv/l n
Ca ++ calcium uM n
Mg ++ magnesium uM n
Na+ sodium uM n
K+ potassium uM n
SO-4 sulfate uM n
Cl- cloride uM n
(12) CALCULATIONS
Variable Formula
uM = (ppm x 1000)/molecular weight of element
K+: 39.1g/mol
Na+: 22.99g/mol
Ca++ : 40.08 g/mol
Mg++ : 24.31 g/mol
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