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On-site analysis of trace environmental contaminants
New developments in GC-MS and GC-PID instrumentation for rapid on-site analysis of
trace environmental contaminants
Andrew Hobson
Quantitech Ltd
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On-site analysis of trace environmental contaminants
The Torion Technologies TRIDION 9 GC-TMS
The Defiant Technologies Frog 4000 GC-PID
Technology Use Applications
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On-site analysis of trace environmental contaminants
Technology - TRIDION 9 GC-TMS
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On-site analysis of trace environmental contaminants
Technology - TRIDION 9 GC-TMS LTM GC module
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On-site analysis of trace environmental contaminants
Low thermal mass (LTM) gas chromatograph
Technology - TRIDION 9 GC-TMS LTM GC Column
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On-site analysis of trace environmental contaminants
Technology - TRIDION 9 GC-TMS Ion trap module
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On-site analysis of trace environmental contaminants
7
Toroidal Ion Trap Conventional Ion Trap
Technology - TRIDION 9 GC-TMS Toroidal ion trap
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On-site analysis of trace environmental contaminants
Sample
Column Detector
Oven
Technology - TRIDION 9 GC-TMS Sample path
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On-site analysis of trace environmental contaminants
Technology - TRIDION 9 GC-TMS User interface
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On-site analysis of trace environmental contaminants
Post-run Showing Library Hits
Technology - TRIDION 9 GC-TMS Result display
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On-site analysis of trace environmental contaminants
Technology – FROG 4000 GC-PID Sample flow path
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On-site analysis of trace environmental contaminants
Technology – FROG 4000 GC-PID Analytical module
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On-site analysis of trace environmental contaminants
Technology – FROG 4000 GC-PID Pre-concentrator
• ‘Tombstone’ array • Sol gel (application specific) coating • Heating to ‘fire’ sample to GC
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On-site analysis of trace environmental contaminants
Technology – FROG 4000 GC-PID Micro GC column
• 2.5m Column • 0.80 Micron OV-1 Deposition • Ramping to 150oC
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On-site analysis of trace environmental contaminants
Technology – FROG 4000 GC-PID Analytical module
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On-site analysis of trace environmental contaminants
Technology – FROG 4000 GC-PID Result display
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On-site analysis of trace environmental contaminants
Use - TRIDION 9 GC-TMS Solid Phase Microextraction (SPME) Syringe
Field Sampling Must Be:
Quick: single step sample extraction and concentration
Easy single-handed operation in protective glove
Reliable sampling of gases, liquids and solids
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On-site analysis of trace environmental contaminants
CON C
PPT
%
Gas Vapor Liquid Solid
Direct Gas Sampling
Thermal Desorption Concentrator
Liquid Injection
SPME
• Concentrations ranging from parts per trillion to percent
• Wide boiling point range
• Sample matrix
• Chemical activity
Use - TRIDION 9 GC-TMS Solid Phase Microextraction (SPME) Syringe
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On-site analysis of trace environmental contaminants
Use - TRIDION 9 GC-TMS
Injection of sample using SPME sampler automatically initiates analytical run
Automatic deconvolution of GC and MS output with results and supplementary information displayed on UI
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On-site analysis of trace environmental contaminants
Use – FROG 4000 GC-PID
Sample vial containing water or water/soil sample
Sparge with scrubbed air to pass volatiles to pre-concentrator
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On-site analysis of trace environmental contaminants
Use – FROG 4000 GC-PID
Air Sampling module – passing air sample over pre-concentrator. Sample desorbed and passed through analytical module.
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On-site analysis of trace environmental contaminants
Case study – TRIDION GC-TMS Trihalomethanes (THMs) in water • Carcinogens • 80 ppb limit in
treated water • On site analysis for
screening • Eliminates error and
sample change or loss during transportation
• SPME sampler used to acquire sample, headspace or immersion
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On-site analysis of trace environmental contaminants
Case study – TRIDION GC-TMS Geosmin – Released during bacterial breakdown,
Extracted Ion Chromatograms of 1 ppt Geosmin in Water
7334B m/z 112 Geosmin
7335B m/z 112
Geosmin
7336B m/z 112
Geosmin
GC conditions: Injector: 290oC column: 50oC initial, hold 10 s; 1o/s rate; 290oC final hold 10 s Inlet pressure: ~26 psi Splitless mode: 50:1/40-60 s; 10:1/20-40 s
Chemical name: (4S,4aS,8aR)-4,8a-Dimethyl-1,2,3,4,5,6,7,8-octahydronaphthalen-4a-ol Causes ‘earthy’ taste in fish (broken down with acid – vinegar!) Responsible for the smell after rain Detectable by humans at 5 ppt
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On-site analysis of trace environmental contaminants
Case study – TRIDION GC-TMS Odour analysis • 90 % of complaints
to EA for air pollution are due to odour
• Waste processing away from landfill on increase
• Standard method of odour analysis is human assessment
• GC-MS provides on-site speciated analysis of odour compounds
Allyl methyl sulfide Dimethyl disulfide Diallyl sulfide Allyl n-propyl sulphide Aminothiazole Methyl propyl disulfide Methyl 1-propenyl disulfide
Dimethyl trisulfide Diallyl disulphide Dipropyl disulfide Ethanedithioamide N N-dimethyl- Ethanol Thiocyanic acid, methyl ester
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On-site analysis of trace environmental contaminants
Case study – FROG 4000 GC-PID
Analysis of ppb VOCs in soil, water or air
• Collect 30 seconds GC Ramp: • Cold 40oC hold for 360 seconds • Ramp 40oC to 60oC over 60 seconds • Hot 100oC hold for 60 seconds
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On-site analysis of trace environmental contaminants
Case study – FROG 4000 GC-PID
• Tetrachloroethylene intrusion into indoor environment from contaminated sub-soil • Long term in-situ analysis showed influence of meteorological conditions
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On-site analysis of trace environmental contaminants
• On-site analysis of environmental pollutants
• Results available immediately
• No error or sample loss in transportation
• Easy to use intuitive user interface
• Reconfigure for new applications