2013 R&D 100 Winner
PID Analyzers' Model 33 Arsenic in Water & Food AnalyzerBeginning in 2011, public concern mounted over whether common food items such as apple juice and baby formulas contained hazardous levels of arsenic. After January 2012, when Consumer Reports ran tests on 88 samples of apple juice from a number of manufacturers and found levels as high as 25 ppb in some samples, instrument developers at PID Analyzers took a second look at the problem of detecting ppb levels of arsenic in foods. Their work triggered development of the Model 33 Arsenic in Water & Food Analyzer. With a detection limit of 100 pppt, the Model 33F is a sensitive and easy-to-use analyzer for the speciation and detection of arsenic compounds (inorganic and organic) in food, water or soil. The technology used is hydride generation and gas chromatography (GC) coupled with a photoionization detector (PID). The analyzer uses a pre-concentrator to collect the sample, which is then thermally desorbed and injected into a GC. The pre-concentrator is a solid adsorbent that collects Arsine (AsH3) that is then thermally desorbed, replacing the conventional liquid nitrogen trap.


PID Analyzers

Development Team

PID Analyzers' Model 33 Arsenic in Water & Food Analyzer development team (l-r): Jack Driscoll and Greg Cutter.


The Model 33 Arsenic in Water & Food Analyzer Development Team from PID Analyzers
Jack Driscoll, Principal Developer
Greg Cutter