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SUMMARY:Improving Electrochemical Point-of-Need Detection of Heavy Metals
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20195001T000000
UID:2026-04-28-23-16-43@natsci.colostate.edu
DTSTAMP:20260428T231643
Description:Research Seminar Abstract\n\nHeavy metal pollution is ubiquitou
 s throughout the environment\, often a result of anthropogenic sources\, a
 nd chronic or acute exposures have significant negative impacts on human a
 nd environmental health. Current\, centralized laboratory testing is often
  insufficient for large-scale environmental testing and limiting exposures
  as a result of high costs ($100s per sample) and extensive training requi
 red. New inexpensive and rapid alternatives are needed for testing at the 
 point-of-need. The simultaneous detection of multiple metals from a single
  sample is a beneficial tool to further reduce cost and analysis time\; ho
 wever\, this is challenging in the field with current electroanalytical te
 chniques\, where tuning assay conditions for a metal often results in poor
  selectivity and/or sensitivity for other metals in the mixture\, if not o
 utright requiring a separate assay. Stencil printed carbon electrodes (SPC
 Es) are the typical electrode choice for point-of-need diagnostics\, owing
  to their disposability and low cost. SPCEs suffer from relatively poor el
 ectrochemical characteristics though\, requiring extensive\, time-consumin
 g\, and expensive electrode surface modifications to detect metals. In thi
 s work\, an electrochemical paper-based analytical device (ePAD) for simul
 taneous electrochemical detection in dual operating conditions whereby sam
 ple is wicked down separate channels containing specific reagents for the 
 optimal detection of each metal is discussed. A novel glassy carbon microp
 article stencil printed electrode (GC-SPE) composition\, which outperforms
  conventional SPCEs for the detection of Cd and Pb\, is also developed wit
 h the goal of combining the ePAD and SPCEs toward simpler devices for the 
 detection of heavy metals at the point-of-need. The GC-SPEs have been used
  to detect trace Cd and Pb\, without prior modification\, providing detect
 ion limits of 2.5 and 5.0 ppb respectively. The ePAD and electrodes develo
 ped in this work significantly simplify heavy metal analysis in the field\
 , providing a more rapid response to exposure without adding to the cost. 
 4:00 pm
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