NMHCs_GC_online_biogenicVOCs_HPB
operational
🔬 gas chromatograph, online
🏭 Agilent
📦 Agilent 6890
▶ Description
Gas chromatograph operated at the observatory platform Meteorological Observatory Hohenpeissenberg (DWD) to perform online in-situ measurements of biogenic volotile organic compounds (BVOCs).
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▶ 🔧 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 heated treated stainless steel 1/16" (~80ml/min) |
| Residence time | 2.0 s |
| Inlet line heating | ✓ |
| Inlet line temperature | 50.0 °C |
| Filter inlet material | None |
▶ 💨 Sample from 2012-01-01
| Sample air flow | Vacuum sampling |
| Pump | |
| Kind of pump | Membrane |
| Air flow | 80.0 mL/min |
▶ 🧬 Compounds from 2012-01-01
| # | Name |
|---|---|
| 1 | 1,3,5-trimethylbenzene |
| 2 | 1,2,4-trimethylbenzene |
| 3 | 1,2,3-trimethylbenzene |
| 4 | alpha-pinene |
| 5 | beta-pinene |
| 6 | 3-carene |
| 7 | limonene |
| 8 | p-cymene |
| 9 | eucalyptol |
| 10 | sabinene |
| 11 | acetone |
▶ 🧪 Air Treatment during sampling from 2012-01-01
| Water removal | Ab-/Adsorbent type |
| CO₂ removal | None |
| Oxidant removal | Cartridges/filter material |
| Cartridges/filter material | Na2SO3 |
| Particle removal | PTFE (Teflon) |
▶ 🌬️ Air Sampling from 2012-01-01
| Air sampling technique | Concentrating on adsorbents |
| Concentrating on adsorbents | |
| Adsorption material | self-filled treated stainless steel tube (Markes) or glass (Supelco) filled with Tenax TA (~150mg) and CarbopackX (~200mg) |
| 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 | 0002b |
| Sampling interval | 12.0 hours |
| Air sampling duration | 20.0 min |
| Air sampling volume | 1.5 L |
▶ 💉 Injection from 2012-01-01
| Injection technique | Thermodesorption |
| Thermodesorption mode | Cryofocus |
| Cryofocus adsorption | -180.0 °C |
| Cryofocus desorption | 60.0 °C |
| Injection split | Splitless |
▶ ⚗️ GC System from 2012-01-01
| Instrument manufacturer | Agilent |
| Instrument model | Agilent 6890 |
| First column | |
| Length | 50.0 m |
| Material | BPX-5 |
| Film thickness | 0.5 µm |
| Inner diameter | 320.0 µm |
▶ 📡 Detection from 2012-01-01
| Detection method | FID-MS |
| Detection system | |
| Manufacturer | Agilent |
| Model | Agilent 5975B inert XL |
| Mass spectrometry system | |
| Mass spectrometry manufacturer | Agilent |
| Mass spectrometry model | Agilent 5975B inert XL |
| Type | Quad-Pol |
| Tune frequency | Monthly |
▶ 📐 Calibration from 2012-01-01
| Zero gas generation technique | Catalyst |
| Zero gas generation with catalyst | |
| Catalyst type | Customade PD/PT catalyst |
| Catalyst temperature | 400.0 °C |
| Calibration frequency | 1.0 days |
| Zero gas / Blank frequency | 1.0 weeks |
| Blank substraction | Applied |
| Linearity check frequency | 1.0 months |
Certificates (3)
Name: NIST_Monoterpenes_2024_HPB
Supplier: NIST
Valid: 2024-03-15 → 2027-03-14
Applied: 2024-04-16 → ?
Name: NPL_NMHCs_2012_HPB
Supplier: NPL
Cylinder: D91 0379
Valid: 2012-11-14 → 2014-11-13
Applied: 2012-01-01 → 2024-12-31
Name: NPL_NMHCs_2024_HPB
Supplier: NPL
Cylinder: D217056
Valid: 2024-07-05 → 2029-07-04
Applied: 2025-01-01 → ?
▶ 📋 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 analysis of target gases |
▶ 📤 Data Submission
| Database | Submission interval |
|---|---|
| ACTRIS | 1.0 years |
| GAW-WDCRG | 1.0 years |
| EMEP | 1.0 years |