Friday, May 15, 2015

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.





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