Application of spectroelectroanalysis for the quantitative determination of mixtures of compounds with highly overlapping signals

Garoz‐Ruiz, Jesus; Guillen-Posteguillo, Carlos; Colina, Álvaro; Heras, Aránzazu

doi:10.1016/j.talanta.2018.12.002

Cited by 20 publications

(28 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From a quantitative point of view, the most used SEC techniques are UV/Vis absorption SEC , fluorescence SEC and Raman SEC . For this reason, and taking into account the objectives of this review, these three techniques are those that will be described in more detail below.…”

Section: Whatmentioning

confidence: 99%

“…Although its reflectance is not remarkable, very good results in UV/Vis‐SEC experiments can be obtained . It is noteworthy that, in the last years, screen‐printed electrodes (SPE) have been commonly used for SEC experiments , being disposable electrodes that can be very useful for analytical purposes.…”

Section: Howmentioning

confidence: 99%

“…Sometimes it is possible to observe chemical reactions taking place at the interface which cannot be observed using the electrochemical signal . Moreover, the high amount of data obtained in a SEC experiment helps to resolve overlapped voltammograms and/or spectra of interfering compounds . In addition, spectroscopic signals can be used in different ways, not only as they are obtained, but also using the derivative with respect to time or with respect to wavelength.…”

Section: Whymentioning

confidence: 99%

“…In addition, spectroscopic signals can be used in different ways, not only as they are obtained, but also using the derivative with respect to time or with respect to wavelength. Undoubtedly, the high selectivity of SEC is the main advantage of this technique to develop sensors , although, for the time being, few examples of this advantage can be found in literature. Separation of the faradaic and non‐faradaic contribution of an electrochemical reaction. As is well‐known, the spectral signal is not affected by non‐faradaic currents.…”

Section: Whymentioning

confidence: 99%

“… Development of SEC sensors can be based on the optical response , but also on both responses (optical and electrical) . This last type of sensors provides two independent signals that yield the concentration of the sample with two independent techniques, giving a highest robustness to the analytical method.…”

Section: Whymentioning

confidence: 99%

See 4 more Smart Citations

Spectroelectrochemical Sensing: Current Trends and Challenges

et al. 2019

Self Cite

View full text Add to dashboard Cite

Spectroelectrochemistry (SEC) has been used for more than 50 years, but this set of techniques has not been widely used for quantitative analysis. For many years, no commercial instruments were available, which made very difficult to spread the use of SEC. Nowadays, only the creativity of the researchers is required to exploit the capabilities of SEC. This review is written with the aim of showing the potential of SEC, mainly for analytical chemistry. Here, we explain what SEC is, how analytical responses can be obtained, why these techniques are useful for sensors, with a brief description of its advantages in use, and, finally, we try to show the challenges that must be addressed in the next years. SEC can resolve interesting analytical problems using the high amount of data provided by this intrinsic trilinear technique. Given the quantitative analysis point of view of this review, the discussion of the SEC techniques is focused on UV/Vis absorption, photoluminescence and Raman SEC.

show abstract

Section: Whatmentioning

confidence: 99%

Section: Howmentioning

confidence: 99%

Section: Whymentioning

confidence: 99%

Section: Whymentioning

confidence: 99%

Section: Whymentioning

confidence: 99%

See 3 more Smart Citations

Spectroelectrochemical Sensing: Current Trends and Challenges

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

A Simple Strategy for Easily Assembling 3D Printed Miniaturized Cells Suitable for Simultaneous Electrochemical and Spectrophotometric Analyses

et al. 2019

View full text Add to dashboard Cite

A rapid and user‐friendly approach is here presented for assembling smart and versatile platforms for simultaneous electrochemical and spectrophotometric measurements. They consist of an optically transparent pencil‐drawn electrochemical cell, including reference, counter and working carbon electrodes, assembled on flexible PVC supports, exploiting a commercial desktop digitally controlled plotter/cutter. This cell is installed on a U shaped 3D printed polylactic frame where a second transparent window consisting of an unmodified PVC layer was also applied. After optimization of the fabrication procedure, the electrochemical and optical characterization of the assembled miniaturized platforms was performed by using aqueous electrolytes and potassium hexacyanoferrate(II) as redox probe. These devices were then tested by a proof‐of‐concept direct and simultaneous electrochemical and spectrophotometric quantification of a commonly used food dye (Brilliant Blue, E‐133) in soft‐drinks and candies. Spectrophotometric and electrochemical determinations can be performed at the same time, providing simultaneous information and enabling a concomitant comparison and validation of the results obtained.

show abstract