NMHCs_GC_online_CX3400-MS-SaturnIII_HPB
Varian_GC-3400-MS_HPB_C5-C14-hydrocarb
retired
▶ 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 2001-05-01
| 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 1998-01-01
| Sample air flow | Vacuum sampling |
| Pump | |
| Kind of pump | Membrane |
| Air flow | 80.0 mL/min |
▶ 🧬 Compounds from 9999-01-01
▶ 🧪 Air Treatment during sampling from 2000-01-01
| Water removal | Ab-/Adsorbent type |
| CO₂ removal | None |
| Oxidant removal | Cartridges/filter material |
| Cartridges/filter material | Na2S2O3 |
| Particle removal | PTFE (Teflon) |
▶ 🌬️ Air Sampling from 2000-01-01
| Air sampling technique | Concentrating on adsorbents |
| Concentrating on adsorbents | |
| Adsorption material | self-filled stainless steel tube or glass (Supelco) filled with Tenax TA and CarbopackX and Carboxen |
| Adsorption temperature | 30.0 °C |
| Desorption temperature | 200.0 °C |
| Air sampling system manufacturer | DWD |
| Air sampling system model | DWD custom-made |
| Sampling system serial number | 0002a |
| Sampling interval | 12.0 min |
| Air sampling duration | 20.0 min |
| Air sampling volume | 1.5 L |
▶ 💉 Injection from 2000-01-01
| Injection technique | Thermodesorption |
| Thermodesorption mode | Cryofocus |
| Cryofocus adsorption | -180.0 °C |
| Cryofocus desorption | 60.0 °C |
| Injection split | Splitless |
▶ ⚗️ GC System from 2000-01-01
| Instrument manufacturer | Varian |
| Instrument model | Varian CX 3400 |
| First column | |
| Length | 50.0 m |
| Material | BPX-5 |
| Film thickness | 0.5 µm |
| Inner diameter | 320.0 µm |
▶ 📡 Detection from 2000-01-01
| Detection method | FID-MS |
| Detection system | |
| Manufacturer | Varian |
| Mass spectrometry system | |
| Mass spectrometry manufacturer | Varian |
| Mass spectrometry model | Varian Saturn III |
| Type | Ion Trap |
| Tune frequency | Monthly |
▶ 📐 Calibration from 2000-01-01
| Zero gas generation technique | Catalyst |
| Zero gas generation with catalyst | |
| Catalyst type | Custom-made PD/PT catalyst |
| Catalyst temperature | 400.0 °C |
| Calibration frequency | 2.0 weeks |
| Number of repetitions | 3.0 |
| Zero gas / Blank frequency | 1.0 weeks |
| Blank substraction | Applied |
| Linearity check frequency | 1.0 months |
Certificates (3)
Name: NPL_NMHCs_1998_HPB
Supplier: NPL
Cylinder: 2851B
Valid: 1998-08-01 → 2026-08-10
Applied: 2000-01-01 → 2005-10-01
Name: NPL_NMHCs_2005_HPB
Supplier: NPL
Cylinder: APE 358162
Valid: 2005-08-01 → ?
Applied: 2005-10-01 → 2010-10-01
Name: NPL_NMHCs_2009_HPB
Supplier: NPL
Cylinder: D64 1624
Valid: 2009-12-02 → 2011-12-01
Applied: 2010-10-01 → 2012-01-01
▶ 📋 Measurement QA/QC
| Instrument log book | Hard copy |
| Checklist | 1.0 days |
▶ ✅ Data QA/QC
| Time series analysis of calibrations | ✓ |
| Time series analysis of compound ratios | ✓ |
| @VOC@ | ✓ |
| Other QA/QC method | Check of time series of retention times and peak width (excel), Check of time series of target gases |
▶ 📤 Data Submission
| Database | Submission interval |
|---|---|
| ACTRIS | 1.0 years |
| EMEP | 1.0 years |
| GAW-WDCRG | 1.0 years |
▶ 👤 Operators
| Operator | Level |
|---|---|
| 0009-0006-5196-5402 | scientist |
| Test User | technician |
| Test User | technician |