Organic Geochemistry Facility

BGS Science Facilities – Centre for Environmental Geochemistry

We offer a range of organic geochemical measurements, experiments and interpretations spanning environmental change, environmental pollution as well as hydrocarbon geochemistry. We specialise in organic geochemical measurements at the bulk and molecular level in complex matrices such as soils, sediments (lake, estuarine-coastal, open marine) effluent-sludges, biota, waters as well as drilled rock core and chippings.

Our work

Some of our current work includes:

  • Legacy, emerging and sewage contamination in sediments, Thames estuary, UK
  • Pharmaceuticals, pesticides and toxicity, Nairobi River, Kenya
  • Sediment and soil pollution of Red River and urban canals of Hanoi, Vietnam
  • PAH, PCB and black carbon in surface soils central London, UK
  • Dermal bioaccessibility of PAH for the re-development of brownfield sites
  • Tracking organic carbon by molecular markers in the Conwy estuary, Wales, UK
  • Chemical characterisation of fossil woods (lignites) from the Miocene
  • Carbon storage and organic matter stability in freshwater wetland peats (Mexico, Panama)
  • Rock-Eval(6) hydrocarbon geochemistry of Carboniferous shales, UK
  • Understanding the transfer of hydrocarbon bearing parent rock to soils
  • Rock-Eval(6) pyrolysis – bulk rock method- for oil and gas exploration, provision of 16 standard acquisition and calculated parameters used to evaluate source rocks and hydrocarbon potential. Measurement of TOC (per cent), S1, S2, S3, Hydrogen Index, Oxygen Index, Production index, Tmax, TpS2, residual organic carbon (per cent), mineral carbon (per cent) of rocks, cuttings, coals and isolated kerogens.

 

  • Rock-Eval(6) pyrolysis – organic matter method – to asses organic matter changes in geologically immature environmental materials including soils, estuarine sediments, upland and coastal peats, microplastics, wood/charcaol and other biological/forensic materials (tyres/vegetation/paints). Rock-Eval requires between 10 to 60 mg material per analysis. For all peat and soil characterisation we offer calculated Recalcitrance and Lability indices (R and I index) in addition to the other parameters.

 

  • Iatroscan –thin layer chromatography to assess total petroleum hydrocarbons (TPH) to give saturate, aromatic and resion/asphaltene compound class concentrations enabling a rapid assessment of hydrocarbons whether in source rock or oil spill impacted sediment or soil.

 

  • Gas Chromatography-Mass Spectrometry-Mass Spectrometry (GC/MS/MS) (Thermo Scientific Trace 1300 GC TSQ900 Triple quadrupole system) for the separation and measurement of: 1) organic contaminants including polycyclic aromatic hydrocarbons (PAH 32 compounds), polychlorinated biphenyls (PCB), polybrominated diphenyl ethers (PBDE), faecal stanols/sterols and others such as organo chlorinated pesticides (DDT); 2) Measurement of organism/process specific biomarker compounds (e.g. steranes, triterpanes) using selected ion monitoring (SIM) or MS/MS; 4) Molecular palaeothermometers such as alkenones for the UK37 and UḰ37 sea-surface temperature proxy.

 

  • Liquid Chromatography-Mass Spectrometry-Mass Spectrometry (LC/MS/MS) (Ultrahigh performance HPLC-Thermo TSQ Quantiva MS/MS) for separation and measurement of: 1) organic contaminants such as pesticides, pharmaceuticals including antibiotics and xenoestrogens; 2) Tetraether lipids (GDGT) and associated BIT index (the ratio between brGDGTs mainly produced by soil bacteria and aquatic crenarchaeol) for tracking carbon in the environment: 3) Molecular palaeothermometers such as TEX 86 for the reconstruction of palaeo sea surface temperatures.

 

  • Toxicity Testing (Microtox Model 500) – we offer both the (aqueous) acute toxicity testing and (soils, sediment, drilling muds, sludges) solid phase testing using the in-vitro bioluminescent bacteria Allivibrio fischeri. The solid phase test requires 7 g of material and the aqueous test requires 10 mL water. Toxicity evaluation by microtox compliments individual compound determinations by GC/MS and LC/MS. Data reported as an EC50 that can be benchmarked against published non-toxic, moderately toxic, acutely toxic assessment criteria.

 

  • Infrared spectroscopy (FTIR), (Bio-Rad FTX3000MX), diffuse reflectance instrument which can be fitted with an auto-sampler for high throughput evaluation of functional group chemistry of leaf litter, peats, soils, sediments, mudrock, rock and biological material.

 

  • Total Organic Carbon and Black Carbon – Elementar macro C analyser for the measurement of TOC (per cent), TIC and TC. Our combustion analyser is capable of analysing large samples (0.5 g dry weight) and thus provide solution to TOC evaluations in soils and sediments. We also offer precise and accurate measurement of Black Carbon (BC per cent) in soils and sediments using classical wet chemical methods combined with elemental analysis.

 

  • Pyrolysis-Gas Chromatography-Mass Spectrometry (CDS 2500 pyroprobe) for the characterisation of structural polymers and macromolecules (polysaccharides, lignin, suberin and tannin) and geomacromolecules (kerogens and coal) present in biological, soils, sediments and rocks.

 

  • Gas Chromatograph (Hewlett Packard 6890) fitted with flame ionization detector (FID), used for the measurement of n-alkanes and fatty acids in soils, sediments and associated biological materials. Evaluation of n-alkane envelop, CPI, Pr+Ph/n-alkanes to indicate maturation, migration, biodegradation.

University collaborations

Organic Geochemistry at BGS collaborate with a variety of UK universities mainly via NERC doctoral training partnership schemes (DTP/CDT).  We regularly host PhD students undertaking experimental work and or laboratory analyses wide range of techniques and procedures available. The students have access to the range of laboratory and applied scientific expertise of the organic geochemistry team and the wider BGS.  Recent visitors include students from universities of Nottingham, Warwick, Reading, Birmingham, Newcastle, Durham, Cambridge, Hanoi and Nairobi.

 Selected publications and reports

Need more information?

For more information please contact Dr Christopher Vane

You may also be interested in

geoscientist in the lab

Centre for Environmental Geochemistry

The Centre for Environmental Geochemistry focuses on the use of geochemistry in research, training and teaching.

Show more
Inorganic science facility

Inorganic Geochemistry Facility

The Inorganic geochemistry facility provides high quality analytical expertise and specialist services for the production and geochemical interpretation of inorganic data for BGS projects, and for commercial, university and public sector clients around the world.

Show more

Was this page helpful?

  • How can we make this section better?*

  • Please select a reason*

  • How can we make this section better?*