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Title: Detecting trihalomethanes using nanoporous-carbon coated surface-acoustic-wave sensors

Abstract

We study nanoporous-carbon (NPC) grown via pulsed laser deposition (PLD) as a sorbent coating on 96.5-MHz surface-acoustic-wave (SAW) devices to detect trihalomethanes (THMs), regulated byproducts from the chemical treatment of drinking water. Using both insertion-loss and isothermal-response measurements from known quantities of chloroform, the highest vapor pressure THM, we optimize the NPC mass-density at 1.05 ± 0.08 g/cm3 by controlling the background argon pressure during PLD. Precise THM quantities in a chlorobenzene solvent are directly injected into a separation column and detected as the phase-angle shift of the SAW device output compared to the drive signal. Using optimized NPC-coated SAWs, we study the chloroform response as a function of operating temperatures ranging from 10–50°C. Finally, we demonstrate individual responses from complex mixtures of all four THMs, with masses ranging from 10–2000 ng, after gas chromatography separation. As a result, estimates for each THM detection limit using a simple peak-height response evaluation are 4.4 ng for chloroform and 1 ng for bromoform; using an integrated-peak area response analysis improves the detection limits to 0.73 ng for chloroform and 0.003 ng bromoform.

Authors:
 [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1235915
Alternate Identifier(s):
OSTI ID: 1248827
Report Number(s):
SAND-2015-20772J; SAND-2014-3449J
Journal ID: ISSN 0013-4651; 558211
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 162; Journal Issue: 6; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 54 ENVIRONMENTAL SCIENCES

Citation Formats

Siegal, Michael P., Mowry, Curtis D., Pfeifer, Kent B., and Gallis, Dorina F. S. Detecting trihalomethanes using nanoporous-carbon coated surface-acoustic-wave sensors. United States: N. p., 2015. Web. doi:10.1149/2.0381506jes.
Siegal, Michael P., Mowry, Curtis D., Pfeifer, Kent B., & Gallis, Dorina F. S. Detecting trihalomethanes using nanoporous-carbon coated surface-acoustic-wave sensors. United States. doi:10.1149/2.0381506jes.
Siegal, Michael P., Mowry, Curtis D., Pfeifer, Kent B., and Gallis, Dorina F. S. Sat . "Detecting trihalomethanes using nanoporous-carbon coated surface-acoustic-wave sensors". United States. doi:10.1149/2.0381506jes. https://www.osti.gov/servlets/purl/1235915.
@article{osti_1235915,
title = {Detecting trihalomethanes using nanoporous-carbon coated surface-acoustic-wave sensors},
author = {Siegal, Michael P. and Mowry, Curtis D. and Pfeifer, Kent B. and Gallis, Dorina F. S.},
abstractNote = {We study nanoporous-carbon (NPC) grown via pulsed laser deposition (PLD) as a sorbent coating on 96.5-MHz surface-acoustic-wave (SAW) devices to detect trihalomethanes (THMs), regulated byproducts from the chemical treatment of drinking water. Using both insertion-loss and isothermal-response measurements from known quantities of chloroform, the highest vapor pressure THM, we optimize the NPC mass-density at 1.05 ± 0.08 g/cm3 by controlling the background argon pressure during PLD. Precise THM quantities in a chlorobenzene solvent are directly injected into a separation column and detected as the phase-angle shift of the SAW device output compared to the drive signal. Using optimized NPC-coated SAWs, we study the chloroform response as a function of operating temperatures ranging from 10–50°C. Finally, we demonstrate individual responses from complex mixtures of all four THMs, with masses ranging from 10–2000 ng, after gas chromatography separation. As a result, estimates for each THM detection limit using a simple peak-height response evaluation are 4.4 ng for chloroform and 1 ng for bromoform; using an integrated-peak area response analysis improves the detection limits to 0.73 ng for chloroform and 0.003 ng bromoform.},
doi = {10.1149/2.0381506jes},
journal = {Journal of the Electrochemical Society},
number = 6,
volume = 162,
place = {United States},
year = {Sat Mar 07 00:00:00 EST 2015},
month = {Sat Mar 07 00:00:00 EST 2015}
}

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Cited by: 1 work
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