Automated portable analyzer for lead(II) based on sequential flow injection and nanostructured electrochemical sensors
Abstract
A fully-automated portable analyzer for toxic metal ion detection based on a combination of a nanostructured electrochemical sensor and a sequential flow injection system has been developed in this work. The sensor was fabricated from a carbon paste electrode modified with acetamide phosphonic acid self-assembled monolayer on mesoporous support (Ac-Phos SAMMS) which was embedded in a very small wall-jet (flow-onto) electrochemical cell. The electrode was solid-state and mercury-free. Samples and reagents were injected into the system and flowed through the electrochemical cell by a programmatic sequential flow technique which required minimal volume of samples and reagents and allowed the automation of the analyzer operation. The portable analyzer was evaluated for lead (Pb) detection due to the excellent binding affinity between lead and the functional groups of Ac-Phos SAMMS as well as the great concern for lead toxicity. Linear calibration curve was obtained in a low concentration range (1 to 25 ppb of Pb(II)). The reproducibility was excellent; the percent relative standard deviation was 2.5 for seven consecutive measurements of 10 ppb of Pb(II) solution. Excess concentrations of Ca, Ni, Co, Zn, and Mn ions in the solutions did not interfere with detection of lead, due to the specificity and themore »
- Authors:
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 859979
- Report Number(s):
- PNNL-SA-45434
Journal ID: ISSN 0039-9140; TLNTA2; 11098; 9305; 6899; KP1301020; TRN: US200523%%16
- DOE Contract Number:
- AC05-76RL01830
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: Talanta; Journal Volume: 68; Journal Issue: 2
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; LEAD; AUTOMATION; ELECTROCHEMICAL CELLS; ELECTRODES; ION DETECTION; PHOSPHONIC ACIDS; SPECIFICITY; ACETAMIDE; PORTABLE EQUIPMENT; MEASURING INSTRUMENTS; environmental molecular sciences laboratory
Citation Formats
Yantasee, Wassana, Timchalk, Chuck, Fryxell, Glen E., Dockendorff, Brian P., and Lin, Yuehe. Automated portable analyzer for lead(II) based on sequential flow injection and nanostructured electrochemical sensors. United States: N. p., 2005.
Web. doi:10.1016/j.talanta.2005.07.013.
Yantasee, Wassana, Timchalk, Chuck, Fryxell, Glen E., Dockendorff, Brian P., & Lin, Yuehe. Automated portable analyzer for lead(II) based on sequential flow injection and nanostructured electrochemical sensors. United States. doi:10.1016/j.talanta.2005.07.013.
Yantasee, Wassana, Timchalk, Chuck, Fryxell, Glen E., Dockendorff, Brian P., and Lin, Yuehe. Thu .
"Automated portable analyzer for lead(II) based on sequential flow injection and nanostructured electrochemical sensors". United States.
doi:10.1016/j.talanta.2005.07.013.
@article{osti_859979,
title = {Automated portable analyzer for lead(II) based on sequential flow injection and nanostructured electrochemical sensors},
author = {Yantasee, Wassana and Timchalk, Chuck and Fryxell, Glen E. and Dockendorff, Brian P. and Lin, Yuehe},
abstractNote = {A fully-automated portable analyzer for toxic metal ion detection based on a combination of a nanostructured electrochemical sensor and a sequential flow injection system has been developed in this work. The sensor was fabricated from a carbon paste electrode modified with acetamide phosphonic acid self-assembled monolayer on mesoporous support (Ac-Phos SAMMS) which was embedded in a very small wall-jet (flow-onto) electrochemical cell. The electrode was solid-state and mercury-free. Samples and reagents were injected into the system and flowed through the electrochemical cell by a programmatic sequential flow technique which required minimal volume of samples and reagents and allowed the automation of the analyzer operation. The portable analyzer was evaluated for lead (Pb) detection due to the excellent binding affinity between lead and the functional groups of Ac-Phos SAMMS as well as the great concern for lead toxicity. Linear calibration curve was obtained in a low concentration range (1 to 25 ppb of Pb(II)). The reproducibility was excellent; the percent relative standard deviation was 2.5 for seven consecutive measurements of 10 ppb of Pb(II) solution. Excess concentrations of Ca, Ni, Co, Zn, and Mn ions in the solutions did not interfere with detection of lead, due to the specificity and the large number of the functional groups on the electrode surface. The electrode was reliable for at least 90 measurements over 5 days. This work is an important milestone in the development of the next-generation metal ion analyzers that are portable, fully-automated, and remotely-controllable.},
doi = {10.1016/j.talanta.2005.07.013},
journal = {Talanta},
number = 2,
volume = 68,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2005},
month = {Thu Dec 15 00:00:00 EST 2005}
}
-
We have successfully developed electrochemical sensors based on functionalized nanostructured materials for voltammetric analysis of toxic metal ions. Glycinyl-urea self-assembled monolayers on mesoporous silica (Gly-UR SAMMS) was incorporated in carbon paste electrodes for the detection of toxic metal ions such as lead, copper, and mercury based on adsorptive stripping voltammetry (AdSV). The electrochemical sensor yields a linear response at low ppb level of Pb2+ (i.e., 2.5 to 50 ppb) after a 2 minute preconcentration period, with reproducible measurements (%RSD = 3.5, N = 6), and excellent detection limits (at few ppb). By exploiting the interfacial functionality of Gly-UR SAMMS, themore »
-
Portable Analyzer Based on Microfluidics/Nanoengineered Electrochemical Sensors for In-situ Characterization of Mixed Wastes
Required characterizations of the DOE's transuranic (TRU) and mixed wastes (MW) before disposing and treatment of the wastes are currently costly and have lengthy turnaround. Research toward developing faster and more sensitive characterization and analysis tools to reduce costs and accelerate throughputs is therefore desirable. This project is aimed at the development of electrochemical sensors, specific to toxic transition metals, uranium, and technetium, that can be integrated into the portable sensor systems. This system development will include fabrication and performance evaluation of electrodes as well as understanding of electrochemically active sites on the electrodes specifically designed for toxic metals, uraniummore » -
Portable Analyzer Based on Microfluidics/Nanoengineered Electrochemical Sensors for In-situ Characterization of Mixed Wastes
Required characterizations of the DOE's transuranic (TRU) and mixed wastes (MW) before disposing and treatment of the wastes are currently costly and have lengthy turnaround. Research toward developing faster and more sensitive characterization and analysis tools to reduce costs and accelerate throughputs is therefore desirable. This project is aimed at the development of electrochemical sensors, specific to toxic transition metals, uranium, and technetium, that can be integrated into the portable sensor systems. This system development will include fabrication and performance evaluation of electrodes as well as understanding of electrochemically active sites on the electrodes specifically designed for toxic metals, uraniummore » -
Portable Analyzer Based on Microfluidics, Nanoengineered Electrochemical Sensors
This report summarizes the NMSU activity over the first year of the project (i.e., the 11/03-8/04 period). This research effort aims at developing a portable analytical system for fast, sensitive, and inexpensive, on-site monitoring of toxic transition metals and radionuclides in contaminated DOE Sites. In accordance to our original objectives our studies have focused on various fundamental and practical aspects of microchip devices for monitoring metal contaminants. As described in this section, we have made a substantial progress, and introduced effective routes for improving the reliability of devices for field screening of toxic metals. This 11-mos activity has already resultedmore » -
Portable Analyzer Based on Microfluidics/Nanoengineered Electrochemical Sensors for in Situ Characterization of Mixed Wastes
This research effort aims at developing a portable analytical system for fast, sensitive, and inexpensive, on-site monitoring of toxic transition metals and radionuclides in contaminated DOE Sites. The portable devices will be based on Microscale Total Analytical systems ( -TAS) or ''Lab-on-a-chip'' in combination with electrochemical (stripping-voltammetric) sensors. The resulting microfluidics/electrochemical sensor system would allow testing for toxic metals to be performed more rapidly, inexpensively, and reliably in a field setting. Progress Summary/Accomplishments: This report summarizes the ASU activity over the second year of the project. In accordance to our original objectives our studies have focused on various fundamental andmore »