The Analyzer Source

Assignment Status: Assigned Session Title: ACS (American Chemical Society) Poster Session Session Date 03/17/2019 Starting Time: ( Slot # 25 ) SUNDAY POSTERS: 3:30pm-7:30pm Author(s) present 5:30pm-7:30pm Location: Pub Pittcon, Pennsylvania Convention Center, Philadelphia, PA Authors : Driscoll and Maclachlan Abstract: A method for the analysis of ppb levels of mercury using a photoionization detector (PID) with a 10.6 eV lamp was described several years ago. The ionization potential for Hg is 10.43 eV, so it responds to the PID. A new gold film in the preconcentrator was used to collect and concentrate the Hg vapor from the air. The system is purged at 200 degrees C to remove any water vapor and/ or VOC’s from the gold film. This also improves the selectivity of the PID since all VOC’s which would respond are removed. Then the gold film is rapidly heated to 550 degrees C to remove the Hg. We have decreased the volume of the preconcentrator by more than an order of magn

Assignment Status: Assigned Session Title: Analytical Agricultural Applications (Half Session) Session Date 03/17/2019 Starting Time: 03:05 PM  ( Slot # 1 )  Authors: Driscoll and Maclachlan Abstract: Carbon dioxide, methane, and nitrous oxide are important greenhouse gases. In fact, methane is the second largest anthropogenic greenhouse gas (GHG), that contributes 14% of total anthropogenic GHG emissions estimated in 2004. Agricultural emissions of methane account for about 60% of the total methane from anthropogenic sources, of which 25% arises from fermentation in livestock. A considerable effort is underway to modify the diets of livestock to reduce methane emissions. A rapid analysis of these components is necessary to accurately measure these components. A considerable amount of ammonia is present and that should be measured. One potential solution to this dilemma is to utilize fast GC columns with a low mass in a portable GC like the PID Analyzers Model GC312. What