NMHCs_GC_online_Medusa_CMN
operational
🔬 gas chromatograph, online
🏭 Agilent
📦 Agilent 7890A
▶ Description
Gas chromatograph operated at the observatory platform CMN-PV 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 | 2.0 m |
| Measurement height above building | 7.0 m |
| Distance from NOx inlet | 0.0 m |
| Distance from ozone inlet | 0.0 m |
| Inlet tube material | composed inlet: 1 m of Pyrex (main inlet for all the instruments) then SS tube |
| Residence time | 6.0 s |
| Inlet line heating | ✓ |
| Inlet line temperature | 20.0 °C |
| Filter inlet material | Stainless steel |
| Lower mesh size | 7.0 µm |
| Upper mesh size | 7.0 µm |
▶ 💨 Sample from 9999-01-01
| 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 9999-01-01
▶ 🧪 Air Treatment during sampling from 9999-01-01
| Water removal | Nafion |
| CO₂ removal | None |
| 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 | Hayesep-D |
| Adsorption temperature | -160.0 °C |
| Desorption temperature | 110.0 °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 7890A |
| First column | |
| Length | 25.0 m |
| Material | PoraBond Q (styrene-divinylbenzene polymer) |
| Film thickness | 5.0 µm |
| Inner diameter | 320.0 µm |
▶ 📡 Detection from 9999-01-01
| Detection method | Mass spectrometry |
| Mass spectrometry system | |
| Mass spectrometry manufacturer | Agilent |
| Mass spectrometry model | Agilent 5977B |
| Type | Quadrupole |
| Tune frequency | Monthly |
▶ 📐 Calibration from 9999-01-01
| Zero gas generation technique | Catalyst |
| Zero gas generation with catalyst | |
| Catalyst temperature | 400.0 °C |
| Calibration frequency | 1.0 months |
| Zero gas / Blank frequency | 1.0 weeks |
| Blank substraction | Applied |
| Linearity check frequency | 12.0 months |
Certificates (1)
Name: NPL_NMHCs_2014_CMN
Supplier: NPL
Cylinder: D99 4206
Valid: 2014-03-11 → 2016-03-10
▶ 📋 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 |
|---|---|
| AGAGE | 1.0 days |