Saturday, May 16, 2015

A new technique for ppt levels of mercury in air & water


Accepted for presentation at #acsBoston on the American Chemical Society Division of Environmental Chemistry August 16-20 2015 at both SCI-MIX and ENVR posters

ABSTRACT SYMPOSIUM NAME: SCI-MIX and General Posters
ABSTRACT SYMPOSIUM PROGRAM AREA NAME: [ENVR] Division of Environmental Chemistry
CONTROL ID: 2253367
PRESENTATION TYPE: Poster
TITLE: A new technique for ppt levels of mercury in air and  water
AUTHORS (FIRST NAME, LAST NAME): John N. Driscoll1Jennifer L. Maclachlan1
INSTITUTIONS (ALL): 1. PID Analyzers, LLC, Sandwich, MA, United States. 
ABSTRACT BODY: 
Abstract: 
We reported recently that the photoionization detector (PID) with a 10.6 eV lamp responds to mercury (Hg) with detection limits of 10 ppb. The PID is a non-specific method for Hg since it also has a strong response to VOC’s. Other non-specific methods like UV absorbance and atomic fluorescence use a gold pre concentrator (GPC) to collect Hg by forming a Au/Hg amalgam at room temperature, purging to remove water and VOC’s then rapidly heating to 500oC to release the Hg. We have found that this same technique can be coupled to the PID to produce an analyzer with detection limits in the ppt range. For Hg in water, the hydride method can be used to reduce Hg+2 to form elemental mercury that is concentrated on a GPC and detected by PID. This method has low ppt detection limits. This presentation will describe the method and results in detail.

Friday, May 15, 2015

SCHB is your link to ACS networks and resources


ABSTRACT SYMPOSIUM NAME: Entrepreneurs' Poster Session & SCI-MIX
ABSTRACT SYMPOSIUM PROGRAM AREA NAME: [SCHB] Division of Small Chemical Businesses
CONTROL ID: 2274406
PRESENTATION TYPE: Poster 
TITLE: SCHB is your link to ACS networks and resources
AUTHORS (FIRST NAME, LAST NAME): Mukund Chorghade1Jennifer L. Maclachlan1, Joseph E. Sabol1, George W. Ruger1, Sharon V. Vercellotti1, Carlyn A. Burton1, Anis Rahman1, Keisha Hylton-Rodic1, David J. Deutsch1
INSTITUTIONS (ALL): 1. SCHB, Natick, MA, United States. 

Abstract: 
As we celebrate our 35th year, SCHB member benefits include: free membership for the first year, a deeply discounted booth exhibit space at ACS national meetings, a listing on our website business directory, Discounted SOCMA membership, outstanding programming at ACS national, regional, and (started in 2012) partnerships with local sections for programming, webinars, and other events. At the heart of it all are amazing networking opportunities for established and start-up chemical businesses. Join us at our networking breakfast on Sunday morning August 16, 2015 at 7am (RSVP here: 
http://ow.ly/PzlqK ), Sunday lunch (RSVP here: 
 http://ow.ly/PzneR ), Monday lunch RSVP here: http://ow.ly/PzmoB and Tuesday  lunch RSVP here: http://ow.ly/PzmUA, and social event at the ACS Boston 250th national meeting, where the real business takes place! Connect with SCHB members and colleagues in the chemical enterprise at the SCHB technical sessions, Expo Booth, and social events. Follow SCHB throughout the year via social media.

Detection of ppb levels of arsenic in beers and wines


ACCEPTED for Presentation at the American Chemical Society 250th National Meeting in Boston August 16-20, 2015 on the Analytical Chemistry Division Program Track



ABSTRACT SYMPOSIUM NAME: Advances in Analytical Separations, Organized by Jennifer Maclachlan
ABSTRACT SYMPOSIUM PROGRAM AREA NAME: [ANYL] Division of Analytical Chemistry
CONTROL ID: 2260931
PRESENTATION TYPE: Oral 
TITLE: Detection of ppb levels of arsenic in beers and wines

AUTHORS (FIRST NAME, LAST NAME): John N. Driscoll1Jennifer L. Maclachlan1
INSTITUTIONS (ALL): 1. PID Analyzers, LLC, Sandwich, MA, United States. 


ABSTRACT BODY: Abstract: Government regulations have resulted in the discontinuation of many
 arsenic compounds in the USA. Still, there may be leftover supplies of arsenical pesticides in farms 
or in the fields that continue to represent residual risk. In fact, we have investigated a series of 
California wines using hydride generation/gas chromatography/photoionization detection 
(HG/GC/PID) for the analysis of trivalent and pentavalent arsenic compounds. We have found 
that the majority of wine samples contain low (10 ppb) levels of trivalent arsenic but high 
(hundreds of ppb) of pentavalent arsenic (presumably from the pesticides). 
Although pentavalent arsenic is less toxic than trivalent arsenic, it is still a serious problem with
 these high levels. We also found some beer samples with high levels of pentavalent arsenic. 
We will discuss this new method for arsenic detection (HG/GC/PID) along with the results 
for beer and wines.





Friday, May 8, 2015

Add photoionization detection capabilities to your GC




Here's a recent installation of our photoionization detector (PID) onto an HP 5890. The PID detector upgrade installation is commonly done by the end user but we had the opportunity to upgrade this client's equipment at our place. Learn more about our PID capabilities below or contact us for a quote using this link. For technical application questions, contact sales@hnu.com.