Gas Chromatograph

Halogenated gases measurements are performed by a Gas Chromatograph -Mass Spectrometry (Agilent 6890/5973) preconcentration/thermal-desorption(Unity-Markes).

Citation proposal
(2011) . Gas Chromatograph. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/0247377b-d149-4960-ab40-14ae2ed630de

Simple

Alternate title: Flask Sampling

Date ( Publication ): 2011-04-01T19:01:00

Purpose: Measurement of greenhouses gas concentration (CFC, HFC, HCFC,...). Air samples at the NCO-P are collected by drawing ambient air into 1-liter stainless steel flasks by means of an ultra clean air pump, over a period of about 10 min, reaching the pressure 1.8×105 Pa. Air aliquots are then analysed by gas chromatography-mass spectrometry (Agilent 6890–5973 GC-MS) equipped with an auto-sampling/pre-concentration unit (Markes International UNITY-Air Server).To obtain new information on the halogenated gas levels and variability in the high Himalayas; to quantify trends in the atmospheric record of anthropogenic halocarbons in the high Himalaya; to identify source regions and origin of these compounds including biogenic processes.

Status: Completed

Point of contact

Ev-K2-CNR - ( )

Via San Bernardino 145 Bergamo BG 24126 Italy

+39 035 3230511

+39 035 3230551

Website: ttp://www.evk2cnr.org/

Point of contact

Institute of Atmospheric Sciences and Climate (ISAC) - CNR - Paolo Bonasoni ( )

Via Gobetti 101 Bologna BO 40129 Italy

+39 051 639 9590

+39 051 639 9652

Principal investigator

Università di Urbino "Carlo Bo" - Chemical Science Institute - Michela Maione ( )

Piazza Rinascimento 6 Urbino 61029 Italy

+39 0722 303316

+39 0722 303310

Website: http://www.uniurb.it/

Maintenance and update frequency: As needed

Keywords

SHARE , Network , Station , High Altitude

Keywords ( Theme )

WMO , GAW , GAWSIS , CEOP

Keywords ( Place )

Nepal , Himalaya

Keywords ( Theme )

air , research , pollution , ecosystems , landscape , natural areas , climate , meteorology

Use limitation: No conditions apply

Access constraints: Copyright

Other constraints

Character set: UTF8

Topic category

Climatology, meteorology, atmosphere
Environment
Geoscientific information

Supplemental Information

Reference system identifier: EPSG / WGS 1984 / 7.4

Topology level: Geometry only

Geometric object type: Point

Geometric object count: 1

OnLine resource: SHARE Geonetwork portal
SHARE Geonetwork portal

OnLine resource: ISAC EVK2-Nepal Climate Observatory - Pyramid website
ISAC EVK2-Nepal Climate Observatory - Pyramid website

OnLine resource: GAWSIS (Global Atmosphere Watch Station Information System) report about Nepal Climate Observatory - Pyramid
GAWSIS (Global Atmosphere Watch Station Information System) report about Nepal Climate Observatory - Pyramid

OnLine resource: Official website of CEOP-HE (Coordinated Energy and water cycle Observation Project - High Elevation)
Official website of CEOP-HE (Coordinated Energy and water cycle Observation Project - High Elevation)

OnLine resource: 5988-3072EN.pdf
Gas Chromatograph -Mass Spectrometry (Agilent 6890/5973)

Hierarchy level: Series

Other: data: halogenated gases

Statement: GCMS is a powerful tool for identifying and quantifying volatile and semivolatile compounds in a variety of samples. The gas chromatograph functions to separate a mixture into its constituents and the mass spectrometer performs the analysis which provides the fingerprint. This fingerprint can be searched in a library of fingerprints to make an identification of unknowns. For calibration purposes, every sample run is bracketed between two working standard runs. Working standards are actual air samples in turn calibrated against the SIO2005 (Scripps Institution of Oceanography) – UB98 (University of Bristol) scales, used within the AGAGE network.