Multicomponent analysis of alcohol vapors using integrated gas chromatography with sensor arrays

Wanekaya, Adam K.; Uematsu, Michiko; Breimer, Marc; Sadik, Omowunmi A.

doi:10.1016/j.snb.2005.01.025

Cited by 36 publications

(19 citation statements)

References 17 publications

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“…Detection of such closely related alcohol vapors is not straightforward, even using gas chromatography and sensor arrays (26). The reference reflectance spectrum of Morpho butterfly scales R(λ) as well as the differential reflectance spectra ΔR(λ) and the dynamic responses upon exposures to these vapors are shown in Fig.…”

Section: Experimental Validation Of the Effect Of Surface Polarity Grmentioning

confidence: 99%

Discovery of the surface polarity gradient on iridescent Morpho butterfly scales reveals a mechanism of their selective vapor response

Potyrailo

Starkey

Vukusic

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

101

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Significance Morpho butterflies are a brilliant spectacle of nature’s capability for photonic engineering. Their conspicuous appearance arises from the interference and diffraction of light within tree-like nanostructures on their scales. Scientific lessons learned from these butterflies have already inspired designs of new displays, fabrics, and cosmetics. This study reports a vertical surface polarity gradient in these tree-like structures. This biological pattern design may be applied to numerous technological applications ranging from security tags to self-cleaning surfaces, gas separators, protective clothing, and sensors. Here it has allowed us to unveil a general mechanism of selective vapor response in photonic Morpho nanostructures and to demonstrate attractive opportunities for chemically graded sensing units for high-performance sensing.

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Section: Experimental Validation Of the Effect Of Surface Polarity Grmentioning

confidence: 99%

Discovery of the surface polarity gradient on iridescent Morpho butterfly scales reveals a mechanism of their selective vapor response

Potyrailo

Starkey

Vukusic

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

101

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“…Recently, new perspectives for the development of novel enzyme immobilization strategies for biosensor applications that use dendrimer are reported in the literature. [36][37][38][39][40][41] This article has been organized in two sections; initially various parameters effecting biosensor efficiency were optimized and characterized in batch system for both GOx and PyOx such as optimum pH, enzyme loading, linear range, operational stability, and shelf life. In the next section, offline FIA experiments were investigated.…”

Section: Introductionmentioning

confidence: 99%

Offline glucose biomonitoring in yeast culture by polyamidoamine/ cysteamine‐modified gold electrodes

Yüksel

Akin

Geyik

et al. 2011

Biotechnology Progress

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This article deals with the use of pyranose oxidase (PyOx) and glucose oxidase (GOx) enzymes in amperometric biosensor design and their application in monitoring fermentation processes with the combination of flow injection analysis (FIA). The amperometric studies were carried out at -0.7 V by following the oxygen consumption due to the enzymatic reactions for both batch and FIA modes. Optimization studies (enzyme amounts and pH) and analytical parameters such as linearity, repeatability, effect of interference, storage, and operational stabilities have been studied. Under optimized conditions, for the PyOx-based biosensor, linear graph was obtained from 0.025 to 0.5 mM glucose in phosphate buffer (50 mM) at pH 7.0 with the equation of y = 3.358x + 0.028 and R(2) = 0.998. Linearity was found to be 0.01-1.0 mM in citrate buffer (50 mM and pH 4.0) with the equation of y = 1.539x + 0.181 and R(2) = 0.992 for the GOx biosensor. Finally, these biosensor configurations were further evaluated in a conventional flow injection system. Results from batch experiments provide a guide to design sensitive, stable, and interference-free biosensors for FIA mode. Biosensor stability, dynamic range, and repeatability were also studied in FIA conditions, and the applicability for the determination of glucose in fermentation medium could be successfully demonstrated. The FIA-combined glucose biosensor was used for the offline monitoring of yeast fermentation. The obtained results correlated well with HPLC measurements.

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“…or in samples from crude extracts obtained from a determined fermentation process. These methodologies, among others, include spectrophotometry [1], high performance liquid chromatography [2], gas chromatography [3,4] or refractometry [5]. Many of these methods provide accurate and precise determination of ethanol but present some disadvantages derived from large and tedious protocols of sample preparation that results in large analysis times.…”

Section: Introductionmentioning

confidence: 99%

Scaffold electrodes based on thioctic acid-capped gold nanoparticles coordinated Alcohol Dehydrogenase and Azure A films for high performance biosensor

Gómez-Anquela

García‐Mendiola

Abad

et al. 2015

Bioelectrochemistry

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Nanometric size gold nanoparticles capped with thiotic acid are used to coordinate with the Zn (II) present in the catalytic center of Alcohol Dehydrogenase (ADH). In combination with the NADH oxidation molecular catalyst Azure A, electrografted onto carbon screen-printed electrodes, they are used as scaffold electrodes for the construction of a very efficient ethanol biosensor. The final biosensing device exhibits a highly efficient ethanol oxidation with low overpotential of −0.25 V besides a very good analytical performance with a detection limit of 0.14 ± 0.01 μM and a stable response for more than one month.

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Multicomponent analysis of alcohol vapors using integrated gas chromatography with sensor arrays

Cited by 36 publications

References 17 publications

Discovery of the surface polarity gradient on iridescent Morpho butterfly scales reveals a mechanism of their selective vapor response

Discovery of the surface polarity gradient on iridescent Morpho butterfly scales reveals a mechanism of their selective vapor response

Offline glucose biomonitoring in yeast culture by polyamidoamine/ cysteamine‐modified gold electrodes

Scaffold electrodes based on thioctic acid-capped gold nanoparticles coordinated Alcohol Dehydrogenase and Azure A films for high performance biosensor

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