Diesel Compound Recovery From Canisters
Application chemist Tom Robenson presented data showing the recovery of diesel exhaust from canisters. Compounds up to C24 were recovered from canisters using a new heated canister method. The heated canister analysis was developed for the ARMY for the analysis of chemical weapons collected in canisters.
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Extended GC/MS Dynamic Range for TO14 & TO15
The power of GC/MS is hampered by its limited dynamic range. Entech application chemist Chris Casteel presented data demonstrating a 10 to the 6th dynamic range by means of variable injection volume. In this experiment a calibration curve was generated from 1000 ppb to 0.1 ppb for a TO14 TO15 standard.
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Automated Canister Collection System
Entech president Dan Cardin presented an overview of the Model 1800 Automated Canister Sampling Sytem. The instrument was developed under contract to the state of Texas for air toxic sampling at 110 sites. The new toxics sampling network required PAMS, TO14, TO15 and reduced sulfur compound recovery, compounds not recoverable with available canister sampling or auto GC systems. Additional requirements of the contract such as data logging, modem control, QA reporting and compound recovery data were discussed.
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Large Volume Static Headspace (LVSH) A New High Sensitivity GC Headspace Technique
In this presentation, Dan Cardin, President of Entech Instruments introduces and describes how Large Volume Static Headspace (LVSH) sample introduction into a GCMS is performed. He examines the use of LVSH in the analysis of samples benefiting from trace static headspace analysis (Food aromas, Fragrances in flowers, packaging contaminants) and Compares LVSH to other Headspace Techniques Relative to Sensitivity, Statistical Accuracy, Carryover, and Matrix Interference.
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