Novel Spectroelectrochemical Sensor for Ferrocyanide in Hanford Waste Simulant

Maizels, Mila; Stegemiller, Michael L.; Ross, S.; Slaterbeck, Andrew F.; Shi, Yining; Ridgway, Thomas H.; Heineman, William R.; Seliskar, Carl J.; Bryan, Samuel A.

doi:10.1021/bk-2001-0778.ch022

Cited by 10 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This paper extends our group’s efforts in the design, development, and demonstration of spectroscopic-based applications on chemical systems in hazardous and harsh environments. Sensor applications are tailored for use in nuclear fuel reprocessing − solutions containing lanthanides, actinides, and transition metal and related nuclear waste solutions, − at macro- , and microfluidic − scales.…”

mentioning

confidence: 99%

Online Monitoring of Solutions Within Microfluidic Chips: Simultaneous Raman and UV–Vis Absorption Spectroscopies

et al. 2019

Self Cite

View full text Add to dashboard Cite

Microfluidics is an appealing analytical tool in the global effort to close the nuclear fuel cycle. Using a microfluidic chip permits the analysis of greatly reduced sample volumes compared to what is necessary for traditional analytical methods. There is a commensurate reduction in disposal volume and cost. The development of novel sensors is necessary to take full advantage of the microchip configuration, where optical-spectroscopy-based approaches offer a powerful route to characterize chemical composition. This study uses simultaneously applied UV−vis and micro-Raman spectroscopies adapted to function on the microscale to analyze in situ both the Nd 3+ (UV−vis-active) and HNO 3 (Raman-active) concentrations in the same sample. An adjustable translation platform was designed to hold the micro-Raman probe above and perpendicular to the chip face and the UV−vis probe in the plane of the chip. These complimentary spectral techniques when processed through multivariate partial leastsquares (PLS) models gave an accurate picture of the widely varying solution concentrations as a function of time for each solution component. Solution matrix effects can drastically alter analyte signatures as measured by both UV−vis absorbance and Raman spectroscopy. PLS methods successfully modeled these spectral changes and accurately measured concentrations of components of interest within the microfluidic chip.

show abstract

mentioning

confidence: 99%

Online Monitoring of Solutions Within Microfluidic Chips: Simultaneous Raman and UV–Vis Absorption Spectroscopies

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…As is well-known, there are interesting works about electrochemistry in complex samples, being even possible to perform in vivo electrochemistry. − Nevertheless, although spectroelectrochemistry offers inherent advantages and provides more information about physicochemical processes than electrochemistry, the promising field of the study of complex matrices and living or real samples by spectroelectrochemistry − is still taking its first steps. Actually, to the best of our knowledge, and apart from few very interesting devices, − there is a lack of UV–vis absorption spectroelectrochemistry devices that allow us to perform direct measurements in complex matrices, probably because of the intrinsic difficulties to develop devices able to carry out such experiments. The main difficulties in complex sample detection are the presence of interfering species, the absence of the in situ character, the high cost of the equipment, the long analysis times, or the difficulty of the experimental devices.…”

mentioning

confidence: 99%

Direct Determination of Ascorbic Acid in a Grapefruit: Paving the Way for In Vivo Spectroelectrochemistry

2017

View full text Add to dashboard Cite

The study of real samples is more complicated than the study of other systems. However, the inherent advantages of UV-vis absorption spectroelectrochemistry should overcome some difficulties related to direct measurements in complex matrices. For this reason, a singular spectroelectrochemistry device has been fabricated and validated. The novel cell is based on single-walled carbon nanotubes, which are filtered and subsequently press-transferred on a polyethylene terephthalate support using a stencil with a custom design. With this new methodology, working, counter, and reference electrodes are completely flat on the surface, where two optical fibers are fixed in a long optical path length configuration. To demonstrate the usefulness of this device and the power of spectroelectrochemistry techniques to solve problems of the current world, this device is used to quantitatively detect the concentration of ascorbic acid in a complex matrix such as a fruit, directly, without any previous sample pretreatment. The ease to fabricate the device, the advantages related to its use, and the excellent results obtained not only with univariate but also with multivariate analysis, shed more light on the analysis of samples as they occur in nature. According to the particular features of this cell, to the best of our knowledge this is the first spectroelectrochemical sensor that can be inserted directly in a biological matrix, laying the groundwork to perform in vivo measurements in a near future.

show abstract

“…Our group has demonstrated the use of optically transparent electrodes (OTEs) consisting of ITO deposited on a glass substrate for a variety of applications, including the spectroelectrochemical sensing of polycyclic aromatic hydrocarbons by fluorescence, , rhenium and technetium detection by absorption and fluorescence, ,, ruthenium in natural and drinking water, and ferrocyanide detection in the presence of interfering species in Hanford tank nuclear waste samples. − ITO has also recently been shown to be useful for nonspectroscopic techniques, such as cathodic stripping voltammetry to detect manganese where the positive potential limit and low background current are advantageous . An electrode chip consisting of an ITO working electrode, as well as planar auxiliary and reference electrodes, would combine the powerful techniques of spectroscopy and electrochemistry into a highly selective and versatile sensing platform for the detection of a number of hard-to-detect species.…”

mentioning

confidence: 99%

Optically Transparent Thin-Film Electrode Chip for Spectroelectrochemical Sensing

et al. 2017

Self Cite

View full text Add to dashboard Cite

A novel microfabricated optically transparent thin-film electrode chip for fluorescence and absorption spectroelectrochemistry has been developed. The working electrode was composed of indium tin oxide (ITO); the quasi-reference and auxiliary electrodes were composed of platinum. The stability of the platinum quasi-reference electrode was improved by coating it with a planar, solid state Ag/AgCl layer. The Ag/AgCl reference was characterized with scanning electron microscopy and energy-dispersive X-ray spectroscopy. Cyclic voltammetry measurements showed that the electrode chip was comparable to a standard electrochemical cell. Randles-Sevcik analysis of 10 mM K[Fe(CN)] in 0.1 M KCl using the electrode chip gave a diffusion coefficient of 1.59 × 10 cm/s, in comparison to the value of 2.38 × 10 cm/s using a standard electrochemical cell. By using the electrode chip in an optically transparent thin-layer electrode (OTTLE), the absorption based spectroelectrochemical modulation of [Fe(CN)] was demonstrated, as well as the fluorescence based modulation of [Ru(bpy)]. For the fluorescence spectroelectrochemical determination of [Ru(bpy)], a detection limit of 36 nM was observed.

show abstract

Novel Spectroelectrochemical Sensor for Ferrocyanide in Hanford Waste Simulant

Cited by 10 publications

References 0 publications

Online Monitoring of Solutions Within Microfluidic Chips: Simultaneous Raman and UV–Vis Absorption Spectroscopies

Online Monitoring of Solutions Within Microfluidic Chips: Simultaneous Raman and UV–Vis Absorption Spectroscopies

Direct Determination of Ascorbic Acid in a Grapefruit: Paving the Way for In Vivo Spectroelectrochemistry

Optically Transparent Thin-Film Electrode Chip for Spectroelectrochemical Sensing

Contact Info

Product

Resources

About