• Address:
  705 Spear Street
  South Burlington, Vermont 05403
  United States of America
  
  Phone: (802) 391-4135
  Email: femc@uvm.edu
  Website: www.uvm.edu/femc

This project measures atmospheric mercury fractions which contribute to dry and total mercury deposition. Proctor Maple Research Center and VMC participate in a network of sites collecting concentrations of atmospheric mercury species from automated, continuous measuring systems coordinated by the National Atmospheric Deposition Program.

• dataset_eml_attributelistlabel: Average lamp voltage

• dataset_eml_attributelistdescription: Average voltage of the lamp in the analyzer during sampling

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: volt
• dataset_eml_attributelistprecision: 0.0000001
• Unit: volt
• dataset_eml_attributelistnumbertype: real

• dataset_eml_attributelistlabel: Record number

• dataset_eml_attributelistdescription: Instrument-assigned identification number for the record

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: interval
• dataset_eml_attributeliststandardunit: number
• dataset_eml_attributelistprecision: 1
• Unit: number
• dataset_eml_attributelistnumbertype: integer

• dataset_eml_attributelistlabel: Baseline voltage

• dataset_eml_attributelistdescription: Baseline reading emitted by zero air (no mercury)

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: volt
• dataset_eml_attributelistprecision: 0.001
• Unit: volt
• dataset_eml_attributelistnumbertype: real

• dataset_eml_attributelistlabel: Baseline voltage standard deviation

• dataset_eml_attributelistdescription: Standard deviation of the baseline level

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: volt
• dataset_eml_attributelistprecision: 0.001
• Unit: volt
• dataset_eml_attributelistnumbertype: real

• dataset_eml_attributelistlabel: Sample event

• dataset_eml_attributelistdescription: Code indicating the type of sample (elemental, reactive, particulate) assayed

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistenudomainCustom: CodesForHgSampleEventType
• dataset_eml_attributelistcodedefinitioncode: 0
• dataset_eml_attributelistcodedefinition: GEM
• dataset_eml_attributelistcodedefinitioncode: 1
• dataset_eml_attributelistcodedefinition: Flush
• dataset_eml_attributelistcodedefinitioncode: 2
• dataset_eml_attributelistcodedefinition: Pyrolyzer heating
• dataset_eml_attributelistcodedefinitioncode: 3
• dataset_eml_attributelistcodedefinition: PBM2.5 heating
• dataset_eml_attributelistcodedefinitioncode: 4
• dataset_eml_attributelistcodedefinition: GOM heating

• dataset_eml_attributelistlabel: Sample concentration

• dataset_eml_attributelistdescription: Concentration of mercury in the sample

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: customPicogramsPerCubicMeter
• dataset_eml_attributelistprecision: 0.001
• Unit: PicogramsPerCubicMeter
• dataset_eml_attributelistnumbertype: real

• dataset_eml_attributelistlabel: Record timestamp

• dataset_eml_attributelistdescription: Time the record was captured

• dataset_eml_attributeliststoragetype: datetime

• dataset_eml_attributelistmeasurementtype: datetime
• dataset_eml_attributelistformatstring: YYYY-MM-DD hh:mm:ss

• dataset_eml_attributelistlabel: Day and time of year

• dataset_eml_attributelistdescription: Day of year plus decimal representation of hours, minutes and seconds

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: nominalDay
• dataset_eml_attributelistprecision: 0.0001
• Unit: nominalDay
• dataset_eml_attributelistnumbertype: real
• dataset_eml_attributelistbounds:
• dataset_eml_attributelistboundsminimum: 0
• dataset_eml_attributelistboumdsmaximum: 365

• dataset_eml_attributelistlabel: Instrument cartridge sampled

• dataset_eml_attributelistdescription: The cartridge within the instrument from which sample was analyzed

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Instrument date

• dataset_eml_attributelistdescription: Date as set on the instrument

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Instrument hour

• dataset_eml_attributelistdescription: Hour as set on the instrument

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: nominalHour
• dataset_eml_attributelistprecision: 1
• Unit: nominalHour
• dataset_eml_attributelistnumbertype: integer
• dataset_eml_attributelistbounds:
• dataset_eml_attributelistboundsminimum: 0
• dataset_eml_attributelistboumdsmaximum: 23

• dataset_eml_attributelistlabel: Instrument minute

• dataset_eml_attributelistdescription: Minutes as set on the instrument

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: nominalMinute
• dataset_eml_attributelistprecision: 1
• Unit: nominalMinute
• dataset_eml_attributelistnumbertype: integer
• dataset_eml_attributelistbounds:
• dataset_eml_attributelistboundsminimum: 0
• dataset_eml_attributelistboumdsmaximum: 59

• dataset_eml_attributelistlabel: Peak area

• dataset_eml_attributelistdescription: Area under the curve recorded by Cold Vapor Atomic Fluorescence Spectroscopy analysis

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: dimensionless
• dataset_eml_attributelistprecision: 1
• dataset_eml_attributelistnumbertype: integer

• dataset_eml_attributelistlabel: Peak voltage

• dataset_eml_attributelistdescription: Maximum voltage obtained during the sample analysis phase

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: volt
• dataset_eml_attributelistprecision: 0.001
• Unit: volt
• dataset_eml_attributelistnumbertype: real

• dataset_eml_attributelistlabel: Sample period duration

• dataset_eml_attributelistdescription: Duration of the sampling period

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: second
• dataset_eml_attributelistprecision: 1
• Unit: second
• dataset_eml_attributelistnumbertype: integer

• dataset_eml_attributelistlabel: Sample volume

• dataset_eml_attributelistdescription: Volume of the sample analyzed

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: ratio
• dataset_eml_attributeliststandardunit: liter
• dataset_eml_attributelistprecision: 1
• Unit: liter
• dataset_eml_attributelistnumbertype: integer

• dataset_eml_attributelistlabel: Instrument status code

• dataset_eml_attributelistdescription: Code indicating nature of operation of each cartridge

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Instrument time

• dataset_eml_attributelistdescription: Time as set on the instrument

• dataset_eml_attributeliststoragetype: datetime

• dataset_eml_attributelistmeasurementtype: datetime
• dataset_eml_attributelistformatstring: other

• dataset_eml_attributelistlabel: Mode of operation

• dataset_eml_attributelistdescription: Type of operation the instrument ran during time period

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Average temperature of analyzer

• dataset_eml_attributelistdescription: Analyzer's average temperature during sampling

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: interval
• dataset_eml_attributeliststandardunit: celsius
• dataset_eml_attributelistprecision: 0.00001
• Unit: celsius
• dataset_eml_attributelistnumbertype: real

• dataset_eml_methodsUnnamed
  • dataset_eml_methodsStartDate: 2005-05-01
    
  • dataset_eml_methoddescription: The Tekran 2537 system measures mercury concentration using cold vapor atomic fluorescence spectroscopy (CVAFS).
  dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

• dataset_eml_methodsUnnamed
  • dataset_eml_methodsStartDate: 2005-05-01
    
  • dataset_eml_methoddescription: During the first 2 hours of operation, the Tekran 2537 measures the concentration of gaseous elemental mercury (GEM). These measurements are made directly and are presented as 5-minute averages. Each average results from the operation (i.e. collection and analysis) of one of two cartridges that operate in alternating fashion.
  dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNetdataset_eml_methodsQAQC: As alternating cartridges are used for the measurements, cartridge bias is evaluated as part of data validation

• dataset_eml_methodsUnnamed
  • dataset_eml_methodsStartDate: 2005-05-01
    
  • dataset_eml_methoddescription: Gaseous oxidized mercury (GOM) and particulate-bound mercury of mean diameter less than or equal to 2.5 µm (PBM2.5) are adsorbed onto prepared glassware in the Tekran 1130/1135 speciation modules for two hours while simultaneously, the Tekran 2537A is analyzing gaseous elemental mercury (GEM) by drawing ambient air through the system.
  dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

• dataset_eml_methodsUnnamed
  • dataset_eml_methodsStartDate: 2005-05-01
    
  • dataset_eml_methoddescription: After this two hour period, the system desorbs the glassware by heating the glassware in the speciation modules until the PBM2.5 and GOM are converted to gaseous elemental mercury which can then be detected by the 2537A. During this desorption, the system pumps zero air through the speciation modules so that no ambient air (which could contain mercury) is in the system. After one hour of desorption, the system returns to detecting GEM in ambient air.
  dataset_eml_methodsInstrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000dataset_eml_methodsSoftware: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

• dataset_eml_methodsStartDate: 2005-05-01
  dataset_eml_methodsEndDate: 2016-01-04
• dataset_eml_samplingdescription: Software consists of Tekran 2537 analyzer program and Campbell Scientific LoggerNet

• dataset_eml_methodsStartDate: 2005-05-01
  dataset_eml_methodsEndDate: 2016-01-04
• dataset_eml_samplingdescription: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000