NMHCs_GC_online_xx_ZEP
operational
🔬 gas chromatograph, online
🏭 Agilent
📦 Agilent 6890N
▶ Description
Gas chromatograph operated at the observatory platform Zeppelin to perform online in-situ measurements of non-methane hydrocarbons (NMHCs).
▶ 🔧 Inlet System from 9999-01-01
| Operated in atmospheric simulation chamber | ✗ |
| Measurement height above ground | 15.0 m |
| Measurement height above building | 10.0 m |
| Distance from ozone inlet | 30.0 m |
| Inlet tube material | Stainless steel |
| Inlet line heating | ✓ |
| Inlet line temperature | 5.0 °C |
| Filter inlet material | Stainless steel |
| Lower mesh size | 60.0 µm |
| Upper mesh size | 60.0 µm |
▶ 💨 Sample from 9999-01-01
| Sample air flow | Vacuum sampling |
| Pump | |
| Kind of pump | Membrane |
| Pump manufacturer | KNF |
| Pump model | KNF UN05 Neoprene |
| Air flow | 100.0 mL/min |
▶ 🧬 Compounds from 9999-01-01
| # | Name |
|---|---|
| 1 | 2-methylbutane |
| 2 | 2-methyl-propane |
| 3 | benzene |
| 4 | ethene |
| 5 | n-butane |
| 6 | n-pentane |
| 7 | propane |
| 8 | toluene |
▶ 🧪 Air Treatment during sampling from 9999-01-01
| Water removal | Nafion |
| CO₂ removal | Other |
| CO₂ removal | Using two cryotraps and flush out the CO2 during transfer from trap1 to trap2 |
| Oxidant removal | None |
| Particle removal | Stainless steel screen |
▶ 🌬️ Air Sampling from 9999-01-01
| Air sampling technique | Concentrating on adsorbents |
| Concentrating on adsorbents | |
| Adsorption material | Medusa |
| Adsorption temperature | -170.0 °C |
| Desorption temperature | 100.0 °C |
| Air sampling duration | 20.0 min |
| Air sampling volume | 2.0 L |
▶ 💉 Injection from 9999-01-01
| Injection technique | Thermodesorption |
| Thermodesorption mode | Cryofocus |
| Injection split | Splitless |
▶ ⚗️ GC System from 9999-01-01
| Instrument manufacturer | Agilent |
| Instrument model | Agilent 6890N |
| Pre column | |
| Length | 0.5 m |
| Weight | 150.0 mg |
| Material | MS-4A |
| Lower mesh size | 100.0 µm |
| Upper mesh size | 110.0 µm |
| First column | |
| Length | 60.0 m |
| Material | GC-GasPro |
| Inner diameter | 320.0 µm |
| Second column | |
| Length | 25.0 m |
| Material | CP-PoraBOUND Q |
| Inner diameter | 320.0 µm |
▶ 📡 Detection from 9999-01-01
| Detection method | Mass spectrometry |
| Mass spectrometry system | |
| Mass spectrometry manufacturer | Agilent |
| Type | Quadrupole |
| Tune frequency | Monthly |
▶ 📐 Calibration from 9999-01-01
| Zero gas generation technique | N/A |
| Calibration frequency | 1.0 weeks |
| Zero gas / Blank frequency | 1.0 weeks |
| Blank substraction | Applied |
▶ 📋 Measurement QA/QC
| Instrument log book | Electronic |
| Checklist | 1.0 days |
▶ ✅ Data QA/QC
| Time series analysis of calibrations | ✗ |
| Time series analysis of compound ratios | ✗ |
| @VOC@ | ✓ |
▶ 📤 Data Submission
| Database | Submission interval |
|---|---|
| ACTRIS | 1.0 years |