NMHCs_GC_online_Medusa_JFJ
operational
🔬 gas chromatograph, online
🏭 Agilent
📦 Agilent 6890
S/N CN10641022
📌 http://hdl.handle.net/21.11157/zhnwj-fm144
▶ Description
Gas chromatograph operated at the observatory platform Jungfraujoch to perform online in-situ measurements of non-methane hydrocarbons (NMHCs). In addition about 50 different halogenated gases are measured, which include CFCs (chlorofluorocarbons, HCFCs (hydrofluorochlorocarbons), HFCs (hydroflurorocarbons) and HFOs (hydrofluoroolefins).
▶ 🔧 Inlet System from 2008-01-01
| Operated in atmospheric simulation chamber | ✗ |
| Measurement height above ground | 2.0 m |
| Measurement height above building | -10.0 m |
| Distance from NOx inlet | 50.0 m |
| Distance from ozone inlet | 50.0 m |
| Inlet tube material | Synflex |
| Residence time | 62.0 s |
| Inlet line heating | ✓ |
| Inlet line temperature | 10.0 °C |
| Filter inlet material | Stainless steel |
| Lower mesh size | 0.5 µm |
| Upper mesh size | 0.5 µm |
▶ 💨 Sample from 2008-01-01
| Sample air flow | Vacuum sampling |
| Pump | |
| Kind of pump | Membrane |
| Pump manufacturer | KNF |
| Pump model | KNF N86 |
| Air flow | 100.0 mL/min |
▶ 🧬 Compounds from 2008-01-01
| # | Name |
|---|---|
| 1 | 2-methylbutane |
| 2 | 2-methyl-propane |
| 3 | benzene |
| 4 | ethane |
| 5 | propane |
| 6 | toluene |
▶ 🧪 Air Treatment during sampling from 2008-01-01
| Water removal | Nafion |
| CO₂ removal | None |
| Oxidant removal | None |
| Particle removal | Stainless steel screen |
▶ 🌬️ Air Sampling from 2008-01-01
| Air sampling technique | Concentrating on adsorbents |
| Concentrating on adsorbents | |
| Adsorption material | Hayesep |
| Adsorption temperature | -160.0 °C |
| Desorption temperature | 100.0 °C |
| Air sampling system manufacturer | EMPA |
| Air sampling system model | EMPA custom build |
| Sampling system serial number | Medusa-12 |
| Sampling interval | 60.0 min |
| Air sampling duration | 20.0 min |
| Air sampling volume | 2000.0 L |
▶ 💉 Injection from 2008-01-01
| Injection technique | Thermodesorption |
| Thermodesorption mode | Cryofocus |
| Cryofocus adsorption | -160.0 °C |
| Cryofocus desorption | 100.0 °C |
| Injection split | Splitless |
▶ ⚗️ GC System from 2008-01-01
| Instrument manufacturer | Agilent |
| Instrument model | Agilent 6890 |
| Instrument serial number | CN10641022 |
| First column | |
| Length | 60.0 m |
| Material | GS-GASPRO |
| Film thickness | 0.05 µm |
| Inner diameter | 320.0 µm |
| Second column | |
| Length | 25.0 m |
| Material | CP-PoraBOND Q |
| Film thickness | 0.45 µm |
| Inner diameter | 320.0 µm |
▶ 📡 Detection from 2008-01-01
| Detection method | Mass spectrometry |
| Mass spectrometry system | |
| Mass spectrometry manufacturer | Agilent |
| Mass spectrometry model | Agilent 5975B |
| Mass spectrometry serial number | US62734337 |
| Type | Quadrupole |
| Tune frequency | Monthly |
▶ 📐 Calibration from 2008-01-01
| Zero gas generation technique | Alltec |
| Calibration frequency | 2.0 hours |
| Number of repetitions | 1.0 |
| Zero gas / Blank frequency | 1.0 weeks |
| Blank substraction | Applied |
| Linearity check frequency | 12.0 months |
Certificates (1)
Name: NPL_NMHCs_2014_JFJ
Supplier: NPL
Cylinder: D99 4220
Valid: 2014-03-03 → 2026-03-02
Applied: 2008-01-01 → 2026-06-18
▶ 📋 Measurement QA/QC
| Instrument log book | Electronic |
| Checklist | 1.0 weeks |
▶ ✅ Data QA/QC
| Time series analysis of calibrations | ✓ |
| Time series analysis of compound ratios | ✗ |
| @VOC@ | ✓ |
▶ 📤 Data Submission
| Database | Submission interval |
|---|---|
| ACTRIS | 1.0 years |
▶ 👤 Operators
| Operator | Level |
|---|---|
| 0000-0002-9885-7138 | scientist |