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Showing posts from October, 2014

Wicked Sweet Science Cafe~It's how Cape Cod celebrated National Chemistry Week 2014

Candy chromatography with M&Ms


Originally they had planned to use the peanut butter ones, too. But since we all know that kids have a way of ingesting things they shouldn't (we were concerned about allergies) so they crossed it off  the sign and eliminated it from the experiment. 

Analysis of Natural Gas Composition and BTU Content from Fracking Operations

Accepted for presentation at Pittcon 2015
New Orleans, Louisiana March 8-12 2015

Abstract Number: 1370 - 5 Session 1370 - Advances in Energy Research: From Unconventional Fuels to Solar Energy
Day and Time: Tuesday, March 10, 2015, 03:05 PM
Room 240

Authors: Jack Driscoll and Jennifer Maclachlan, PID Analyzers, LLC







Significant shale deposits exist in 22 states including the Northeast states of Ohio, Pennsylvania, and New York Utah and Wyoming in the West; and gas-producing states such as Texas, Louisiana, Arkansas and Mississippi. The use of horizontal drilling and hydraulic fracking of shale has catapulted the US into the leading producer of natural gas in 2013.  Natural gas is bought or sold based on the quantity of energy delivered. The product of the concentration (determined by gas chromatography) and the heating value (BTU) determines the BTU content of the fuel. Although the natural gas from Marcelis shale is primarily methane, the composition can vary considerably from region to regio…

A New Method for the Analysis of ppb Levels of Mercury in Air and Water

Accepted for presentation at Pittcon 2015
March 8-12, 2015
New Orleans, LA
Abstract Number: 1100 - 6
Session 1100 - Environmental - Portable Instrumentation
Day and Time: 0 2015 10:25 AM
Room 256


Authors: Jack Driscoll and Jennifer Maclachlan, PID Analyzers, LLC
Methodology:Other, gold film/photoionizationApplication:EnvironmentalPrimary Focus:ApplicationTitle:A New Method for the Analysis of ppb Levels of Mercury in Air and WaterKeywords:Air
Elemental Analysis
Environmental Analysis
WaterNonspecific methods such as UV absorbance or fluorescence have been successfully used for the analysis of ppb concentrations of mercury in air and water. The unique amalgamation of mercury with gold and silver makes this possible. .Air samples are collected and only the mercury is reacted with the gold surface. Any impurities are purged through, then the amalgam is heated to desorb the mercury which is measured by the detector. 
We have used a very sensitive but nonspecific photoionization detector (PID) with a …

A New Method for ppb Analysis of H2S in Air and Water

Accepted for presentation at Pittcon 2015
March 8 - 12, 2015
New Orleans, LA
Abstract Number: 770 - 3
Session 770 - Environmental - LC/GC Techniques
Day and Time: Monday, March 09, 2015, 02:10 PMRoom 257
Authors: Jack Driscoll and Jennifer Maclachlan, PID Analyzers, LLC




Methodology:Gas ChromatographyApplication: EnvironmentalPrimary Focus: ApplicationTitle: A New Method for ppb Analysis of H2S in Air and WaterKeywords:
Environmental Analysis
Gas Chromatography
GC Detectors
Specialty Gas Analysis
The photoionization detector (PID) is a very sensitive GC detector for sulfur compounds with pg detection limits for hydrogen sulfide. This compound can be efficiently collected in the field in an impinger with a basic solution (0.01M NaOH) at a known period of time and flow rate. The solution should be kept out of sunlight. Back in the lab, since the pKa for H2S is 6.9, the addition of 0.1 M acid will convert the sulfide (collected) to H2S which can be swept out of a vessel with an inlet, exhaust and sep…