NMHCs_GC_online_Medusa25_TOB
operational
▶ Description
Gas chromatograph operated at the observatory platform Taunus Observatory to perform online in-situ measurements of non-methane hydrocarbons (NMHCs).
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▶ 🔧 Inlet System from 2023-01-01
| Operated in atmospheric simulation chamber | ✗ |
| Measurement height above ground | 12.0 m |
| Measurement height above building | 4.5 m |
| Distance from NOx inlet | 5.0 m |
| Distance from condensables inlet | 9.6 m |
| Distance from ozone inlet | 5.0 m |
| Inlet tube material | stainless steel |
| Residence time | 9.0 s |
| Inlet line heating | ✗ |
| Filter inlet material | Stainless steel |
| Lower mesh size | 0.0 µm |
| Upper mesh size | 40.0 µm |
▶ 💨 Sample from 2023-02-05
| Sample air flow | Pumping |
| Pump | |
| Kind of pump | Membrane |
| Pump manufacturer | KNF |
| Pump model | KNF N86KNE |
| Air flow | 100.0 mL/min |
▶ 🧬 Compounds from 2023-02-05
| # | Name |
|---|---|
| 1 | ethyne |
| 2 | ethane |
| 3 | propane |
| 4 | 2-methyl-propane |
| 5 | n-butane |
| 6 | 2-methylbutane |
| 7 | n-pentane |
▶ 🧪 Air Treatment during sampling from 2023-02-05
| Water removal | Nafion |
| CO₂ removal | None |
| Oxidant removal | None |
| Particle removal | None |
▶ 🌬️ Air Sampling from 2023-02-05
| Air sampling technique | Concentrating on adsorbents |
| Concentrating on adsorbents | |
| Adsorption material | Hayesep |
| Adsorption temperature | -160.0 °C |
| Desorption temperature | 110.0 °C |
| Air sampling system manufacturer | Markes |
| Air sampling system model | Markes Medusa |
| Sampling system serial number | ME101025-1 |
| Sampling interval | 1.5 hours |
| Air sampling duration | 20.0 min |
| Air sampling volume | 2.0 L |
▶ 💉 Injection from 2023-02-05
| Injection technique | Thermodesorption |
| Thermodesorption mode | Cryofocus |
| Cryofocus adsorption | -160.0 °C |
| Cryofocus desorption | 110.0 °C |
| Injection split | Splitless |
▶ ⚗️ GC System from 2023-02-05
| Instrument manufacturer | Agilent |
| Instrument model | Agilent 7890B |
| Instrument serial number | CN13513019 |
| First column | |
| Length | 60.0 m |
| Material | GS GasPro |
| Film thickness | 0.0 µm |
| Inner diameter | 320.0 µm |
| Second column | |
| Length | 25.0 m |
| Material | PoraBond Q |
| Film thickness | 5.0 µm |
| Inner diameter | 320.0 µm |
▶ 📡 Detection from 2023-02-05
| Detection method | Mass spectrometry |
| Mass spectrometry system | |
| Mass spectrometry manufacturer | Agilent |
| Mass spectrometry model | Agilent 5977B |
| Mass spectrometry serial number | US2226M041 |
| Type | Quadropole |
| Tune frequency | Monthly |
▶ 📐 Calibration from 2023-02-05
| Zero gas generation technique | N/A |
| Calibration frequency | 3.0 hours |
| Number of repetitions | 1.0 |
| Zero gas / Blank frequency | 1.0 weeks |
| Blank substraction | Applied |
| Linearity check frequency | 0.0 months |
Certificates (1)
Name: NPL_NMHCs_2022_TOB
Supplier: NPL
Cylinder: D982573
Valid: 2022-03-02 → 2024-03-02
Applied: 2023-02-05 → ?
▶ 📋 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@ | ✓ |
| Other QA/QC method | QA/QC following AGAGE protocols using GCWerks software |
▶ 📤 Data Submission
| Database | Submission interval |
|---|---|
| ACTRIS | 1.0 years |
▶ 👤 Operators
| Operator | Level |
|---|---|
| 0000-0002-4501-6108 | expert |
| 0000-0003-0557-3935 | expert |