Limits...
An optical fiber-based sensor array for the monitoring of zinc and copper ions in aqueous environments.

Kopitzke S, Geissinger P - Sensors (Basel) (2014)

Bottom Line: In this work, a new optical fiber-based platform capable of providing fast and accurate results when performing solution analysis for these metals is described.These sensors demonstrated sub-part-per-million detection limits, 30-second response times, and the ability to analyze samples with an average error of under 10%.Finally, after developing sensors capable of monitoring zinc and copper individually, these sensors are combined to form a single optical fiber sensor array capable of simultaneously monitoring concentration changes in zinc and copper in aqueous environments.

View Article: PubMed Central - PubMed

Affiliation: Chemistry and Biochemistry Department, University of Wisconsin-Milwaukee, 3210 N. Cramer Ave. Milwaukee, WI 53201, USA. kopitzke@uwm.edu.

ABSTRACT
Copper and zinc are elements commonly used in industrial applications as aqueous solutions. Before the solutions can be discharged into civil or native waterways, waste treatment processes must be undertaken to ensure compliance with government guidelines restricting the concentration of ions discharged in solution. While currently there are methods of analysis available to monitor these solutions, each method has disadvantages, be it high costs, inaccuracy, and/or being time-consuming. In this work, a new optical fiber-based platform capable of providing fast and accurate results when performing solution analysis for these metals is described. Fluorescent compounds that exhibit a high sensitivity and selectivity for either zinc or copper have been employed for fabricating the sensors. These sensors demonstrated sub-part-per-million detection limits, 30-second response times, and the ability to analyze samples with an average error of under 10%. The inclusion of a fluorescent compound as a reference material to compensate for fluctuations from pulsed excitation sources has further increased the reliability and accuracy of each sensor. Finally, after developing sensors capable of monitoring zinc and copper individually, these sensors are combined to form a single optical fiber sensor array capable of simultaneously monitoring concentration changes in zinc and copper in aqueous environments.

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The chemical structure of FluoZin-1.
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f2-sensors-14-03077: The chemical structure of FluoZin-1.

Mentions: For zinc recognition the commercially available compound, FluoZin-1 (FZ-1. Figure 2) was employed [25]. This fluorophore was chosen because it was stated to measure zinc between 0.05 and 3.30 mg/L. The discharge limit set by the EPA, which states that a manufacturing facility may discharge up to an average of 1.48 mg/L of zinc per day over a 30-day period, falls within this range. Moreover, FZ-1 has excitation and emission wavelengths (λex/λem = 495 nm/515 nm) for which the optical fibers used here have a high transmittivity, which is important for potential remote deployment. Upon binding with zinc, FZ-1 exhibits fluorescence enhancement because of the inhibition of the photo-induced electron transfer process.


An optical fiber-based sensor array for the monitoring of zinc and copper ions in aqueous environments.

Kopitzke S, Geissinger P - Sensors (Basel) (2014)

The chemical structure of FluoZin-1.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3958230&req=5

f2-sensors-14-03077: The chemical structure of FluoZin-1.
Mentions: For zinc recognition the commercially available compound, FluoZin-1 (FZ-1. Figure 2) was employed [25]. This fluorophore was chosen because it was stated to measure zinc between 0.05 and 3.30 mg/L. The discharge limit set by the EPA, which states that a manufacturing facility may discharge up to an average of 1.48 mg/L of zinc per day over a 30-day period, falls within this range. Moreover, FZ-1 has excitation and emission wavelengths (λex/λem = 495 nm/515 nm) for which the optical fibers used here have a high transmittivity, which is important for potential remote deployment. Upon binding with zinc, FZ-1 exhibits fluorescence enhancement because of the inhibition of the photo-induced electron transfer process.

Bottom Line: In this work, a new optical fiber-based platform capable of providing fast and accurate results when performing solution analysis for these metals is described.These sensors demonstrated sub-part-per-million detection limits, 30-second response times, and the ability to analyze samples with an average error of under 10%.Finally, after developing sensors capable of monitoring zinc and copper individually, these sensors are combined to form a single optical fiber sensor array capable of simultaneously monitoring concentration changes in zinc and copper in aqueous environments.

View Article: PubMed Central - PubMed

Affiliation: Chemistry and Biochemistry Department, University of Wisconsin-Milwaukee, 3210 N. Cramer Ave. Milwaukee, WI 53201, USA. kopitzke@uwm.edu.

ABSTRACT
Copper and zinc are elements commonly used in industrial applications as aqueous solutions. Before the solutions can be discharged into civil or native waterways, waste treatment processes must be undertaken to ensure compliance with government guidelines restricting the concentration of ions discharged in solution. While currently there are methods of analysis available to monitor these solutions, each method has disadvantages, be it high costs, inaccuracy, and/or being time-consuming. In this work, a new optical fiber-based platform capable of providing fast and accurate results when performing solution analysis for these metals is described. Fluorescent compounds that exhibit a high sensitivity and selectivity for either zinc or copper have been employed for fabricating the sensors. These sensors demonstrated sub-part-per-million detection limits, 30-second response times, and the ability to analyze samples with an average error of under 10%. The inclusion of a fluorescent compound as a reference material to compensate for fluctuations from pulsed excitation sources has further increased the reliability and accuracy of each sensor. Finally, after developing sensors capable of monitoring zinc and copper individually, these sensors are combined to form a single optical fiber sensor array capable of simultaneously monitoring concentration changes in zinc and copper in aqueous environments.

Show MeSH
Related in: MedlinePlus