Search results for: Chelsea N. Monty

Items from 1 to 8 out of 8 results

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A visible colorimetric sensor based on nanoporous polypropylene fiber membranes for the determination of trihalomethanes in treated drinking water

Evan K. Wujcik, Stephen E. Duirk, George G. Chase, Chelsea N. Monty

Sensors and Actuators B: Chemical > 2016 > 223 > C > 1-8

Water is an integral part of our society, and it is of the utmost importance that this water is clean and safe for potable use. Drinking water sources can become contaminated with halogenated organic compounds (HOCs) via improper disposal of refrigeration or air conditioning units, industrial usage, and even through the disinfection of our drinking water (chlorination). One class of these HOCs regulated...

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Fabric Nanocomposite Resistance Temperature Detector

Nathaniel J. Blasdel, Evan K. Wujcik, Joan E. Carletta, Kye-Shin Lee, more

IEEE Sensors Journal > 2015 > 15 > 1 > 300 - 306

This paper illustrates the characterization of a fabric resistance temperature (RTD) detector made from electrospun nylon-6 functionalized with multiwalled carbon nanotubes (MWCNTs) and polypyrrole (PPy) for use in supracutaneous applications like smart clothing, prosthetic sockets, and other medical devices where a temperature detecting fabric is better suited than a rigid detector. The nanocomposite...

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Detection of halogenated organics by their inhibitory action in a catalytic reaction between dimethyl acetylenedicarboxylate and 2-methyl-4-nitroaniline

Isaac Afreh, Evan K. Wujcik, Nathaniel Blasdel, Benjamin Sauer, more

Journal of Analytical Chemistry > 2015 > 70 > 7 > 825-830

The purpose of this paper is to report on the detection of toxic halogenated organic compounds in water using their inhibitory action on a pyridine-catalyzed reaction between dimethyl acetylenedicarboxylate (DMAD) and 2-methyl-4-nitroaniline (MNA). Previous work has shown that similar techniques can successfully lower the detection limit of sulfides and arsines in water samples, compared to their...

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An acetylcholinesterase-inspired biomimetic toxicity sensor

Evan K. Wujcik, Nicolas J. Londoño, Stephen E. Duirk, Chelsea N. Monty, more

Chemosphere > 2013 > 91 > 8 > 1176-1182

This work demonstrates the ability of an acetylcholinesterase-inspired biomimetic sensor to accurately predict the toxicity of acetylcholinesterase (AChE) inhibitors. In surface waters used for municipal drinking water supplies, numerous pesticides and other anthropogenic chemicals have been found that inhibit AChE; however, there is currently no portable toxicity assay capable of determining the...

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Ion Sensor for the Quantification of Sodium in Sweat Samples

Evan K. Wujcik, Nathaniel Jacob Blasdel, Daniel Trowbridge, Chelsea N. Monty

IEEE Sensors Journal > 2013 > 13 > 9 > 3430 - 3436

We present the conception of an electrochemical sodium ion sensor for point-of-care sweat analysis. This flexible amperometric sensor was developed to quantify the amount of sodium ions in sweat (in real-time), alleviating the wait time, large sample size, possible contamination, and expensive analytical equipment associated with current diagnostic procedures requiring sweat analysis. This sensor...

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Non-biological inhibition-based sensing (NIBS) demonstrated for the detection of toxic arsenic compounds

Chelsea N. Monty, Nicolas J. Londoño, Richard I. Masel

Chemosphere > 2011 > 82 > 11 > 1644-1648

This work demonstrates the success of a recently developed technique in chemical amplification, non-biological inhibition-based sensing (NIBS), for the detection of toxic arsenic compounds. Screening for toxic arsenic compounds is especially important due to their prevalence in wastewater and water sources. The detection method presented in this work amplifies the chemical response of toxic arsenic...

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Optimization of a multiphase sensor for detection of phosphonates in air

Chelsea N. Monty, Ilwhan Oh, Richard I. Masel

AIChE Journal > 56 > 1 > 241 - 247

The objective of this article is to report the modeling and optimization of a new MEMS‐based phosphonate sensor that utilizes a porous membrane between a gas and a liquid stream to allow operation at low‐liquid and high‐gas flow rates. Previous work from our laboratory demonstrated that phosphonate molecules can be detected with such a device, but the sensitivity was insufficient for certain applications...