Details and Metadata

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Methods

The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures

Current Methods


  • Started: 2005-05-01

    The Tekran 2537 system measures mercury concentration using cold vapor atomic fluorescence spectroscopy (CVAFS).

    Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000

    Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet


  • Started: 2005-05-01

    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.

    Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000

    Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

    Quality Control Measures: As alternating cartridges are used for the measurements, cartridge bias is evaluated as part of data validation


  • Started: 2005-05-01

    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.

    Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000

    Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet


  • Started: 2005-05-01

    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.

    Instrumentation: Tekran 2537 analyzer; Tekran 1130 sampler; Tekran 1135 sampler; Campbell Scientific CR3000

    Software: Tekran 2537 analyzer program; Campbell Scientific LoggerNet

Dataset Fields

Detailed documentation of the fields comprising the dataset, including the type of measurement, units where applicable, and any controlled vocabularies or code lists present in the data


Field Name Caption Description Additional Information
AdTimAdTim

AdTim

Nominal
AreaArea

Area

Ratio Units:
BlBl

Bl

Ratio Units:
BlDevBlDev

BlDev

Ratio Units:
CC

C

Nominal
DateDate

Date

DateTime Date/Time Format: DD/MM/YYYY
DateTimeDateTime

DateTime

DateTime Date/Time Format: M-DD-YYYY hh:mm:ss
EventEvent

Event

Nominal
HgConcentrationHgConcentration

Hg Concentration

Ratio Units:
MaxVMaxV

MaxV

Nominal
StatStat

Stat

Nominal
TimeTime

Time

DateTime Date/Time Format: hh:mm:ss
TypTyp

Typ

Nominal
VolVol

Vol

Ratio Units:

Sampling Equipment

Equipment and software used to collect data, including how that equipment was used.

No sampling equipment recorded for this dataset

Site Characteristics

The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection

  • Site Description

    West slope of Mount Mansfield in an open field at the Proctor Maple Research Center. Site has a west aspect and an 8% slope

    Minimum Altitude: 399 meter

    Maximum Altitude: 399 meter