NMHCs_GC_online_AgilentGC7890_FID _HPB
installed
▶ Description
Gas chromatograph operated at the observational platform Meteorological Observatory Hohenpeissenberg (DWD) to perform online in-situ measurements of non-methane hydrocarbons (NMHCs).
▶ 🔧 Inlet System from 2026-01-01
| Operated in atmospheric simulation chamber | ✗ |
| Measurement height above ground | 17.0 m |
| Measurement height above building | 2.0 m |
| Distance from NOx inlet | 6.0 m |
| Distance from condensables inlet | 5.0 m |
| Distance from ozone inlet | 6.0 m |
| Inlet tube material | Highflow glass manifold (ID ~4cm, ~12m/s) into the laboratory from there treated stainless steel 1/16" (~50ml/min) |
| Residence time | 2.0 s |
| Inlet line heating | ✗ |
| Filter inlet material | None |
▶ 💨 Sample from 2026-01-01
| Sample air flow | Vacuum sampling |
| Pump | |
| Kind of pump | Membrane |
▶ 🧬 Compounds from 9999-01-01
▶ 🧪 Air Treatment during sampling from 2026-01-01
| Water removal | Cryotrap |
| CO₂ removal | None |
| Oxidant removal | Cartridges/filter material |
| Cartridges/filter material | Na2S2O3 |
| Particle removal | PTFE (Teflon) |
▶ 🌬️ Air Sampling from 2026-01-01
| Air sampling technique | Concentrating on adsorbents |
| Concentrating on adsorbents | |
| Adsorption material | 1/4" treated stainless steel TD tube with CarbopackB and Carbosieve SIII |
| Adsorption temperature | -25.0 °C |
| Desorption temperature | 280.0 °C |
| Air sampling system manufacturer | DWD |
| Air sampling system model | DWD custom-made |
| Sampling system serial number | 0003 |
| Sampling interval | 6.0 hours |
| Air sampling duration | 15.0 min |
| Air sampling volume | 0.8 L |
▶ 💉 Injection from 2026-01-01
| Injection technique | Thermodesorption |
| Thermodesorption mode | Direct desorption |
| Injection split | Splitless |
▶ ⚗️ GC System from 2026-01-01
| Instrument manufacturer | Agilent |
| Instrument model | Agilent 7890A |
| First column | |
| Length | 50.0 m |
| Material | AL2O3 |
▶ 📡 Detection from 2026-01-01
| Detection method | FID |
| Detection system | |
| Manufacturer | Agilent |
▶ 📐 Calibration from 2026-01-01
| Zero gas generation technique | Catalyst |
| Zero gas generation with catalyst | |
| Catalyst type | Custom-made PD/PT catalyst |
| Catalyst temperature | 400.0 °C |
| Calibration frequency | 1.0 weeks |
| Number of repetitions | 3.0 |
| Zero gas / Blank frequency | 1.0 days |
| Blank substraction | Applied |
| Linearity check frequency | 1.0 months |
Certificates (2)
Name: NPL_NMHCs_2015_HPB
Supplier: NPL
Cylinder: D38 6624
Valid: 2015-12-09 → 2017-12-08
Applied: 2026-01-01 → ?
Name: NPL_NMHCs_2024_HPB
Supplier: NPL
Cylinder: D217056
Valid: 2024-07-05 → 2029-07-04
Applied: 2026-01-01 → ?
▶ 📋 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@ | ✓ |
| Other QA/QC method | time series of retention times and peak width |
▶ 📤 Data Submission
| Database | Submission interval |
|---|---|
| ACTRIS | 1.0 years |
▶ 👤 Operators
| Operator | Level |
|---|---|
| 0009-0006-5196-5402 | scientist |
| 0009-0009-1194-1926 | scientist |
| Test User | technician |
| Test User | technician |