Determination of Water in Slurries by Fiber-Optic Raman Spectroscopy

Lombardi, Daniel; Mann, Charles K.; Vickers, Thomas J.

doi:10.1366/0003702953963841

Cited by 11 publications

(4 citation statements)

References 10 publications

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“…To overcome the disadvantages of using reagents that contain pyridine, a modified titration method was developed . In addition, there exists several methods for water detection, such as the solid-phase microextraction, piezoelectric quartz crystal, microwave interferometer, Raman spectroscopic, and electrometric methods, but these methods require using rather sophisticated equipment and require long measuring times. Thus, there is a need to develop a faster and more convenient method, such as a sensor, for water detection in nonaqueous solutions.…”

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confidence: 99%

Water Sensor for a Nonaqueous Solvent with Poly(1,5-diaminonapthalene) Nanofibers

et al. 2008

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A water sensor for a nonaqueous solvent was fabricated using poly(1,5-diaminonapthalene (DAN) nanofibers, which were prepared through a catalytic chemical polymerization of the DAN monomer using Fe(III) salt as the catalyst. Poly(1,5-DAN) nanofibers were characterized by atomic force microscope (AFM), transmission electron microscope (TEM), scanning electron microscope (SEM), and UV-vis spectroscopy. The electrochemical properties of poly(1,5-DAN) nanofibers were investigated using cyclic voltammetry (CV). The electrochemical activity of poly(1,5-DAN) nanofibers was utilized for water sensing. The fabrication of water sensor was followed by placing one drop (about 2 microL) of 0.01% poly(1,5-DAN) nanofibers solution in the gap between two split gold electrodes (PBSA) and completely dried. The response of the water sensor in an acetonitrile solution was evaluated under optimized conditions. The linear dynamic range was from 0.05 to 20%, and the detection limit was determined to be 0.01%. The response of this sensor was shown to be comparable to that obtained with the Karl Fischer titration method.

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confidence: 99%

Water Sensor for a Nonaqueous Solvent with Poly(1,5-diaminonapthalene) Nanofibers

et al. 2008

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“…Compared to the traditional time-consuming methods (Raman spectroscopy, microwave interferometry, electrometric methods, etc. ), 51,52 which usually rely on sophisticated equipment, the sensors based on highly recognized colorimetric responses observed by the naked eye are more rapid and portable. [53][54][55][56] Sm 3+ , Eu 3+ and Tb 3+ ions act as important luminophores among the lanthanide ions.…”

Section: Introductionmentioning

confidence: 99%

Tunable luminescence of lanthanide (Ln = Sm, Eu, Tb) hydrophilic ionic polymers based on poly(N-methyl-4-vinylpyridinium-co-styrene) cations

Zhao

Qin

et al. 2016

Polym. Chem.

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“…It is because of these reasons that development of new approaches for the measurement has never stopped during the past few decades. Continuous exploration upon IR spectroscopy, , potentiometry, solid-phase extraction, Raman spectroscopy, holographic method, flow-injection, absorbance-based film sensors, , and the recently reported approach of cathodic stripping voltammetry at a gold electrode has existed. These methods, however, are not perfect, and they also suffer from their own limitations: requirement of sophisticated equipment and limited application toward specific solvents.…”

Section: Introductionmentioning

confidence: 99%

A Butterfly-Shaped Pyrene Derivative of Cholesterol and Its Uses as a Fluorescent Probe

et al. 2013

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A butterfly-shaped pyrene derivative of cholesterol, namely, N,N'-(ethane-1,2-diyl)-bis(N-(2-(chol-amino)ethyl)pyrene-1-sulfonamide) (ECPS), has been designed and synthesized. Solvent effect studies revealed that in good solvents such as n-hexane, benzene, and 1,4-dioxane, the profile of the fluorescence emission of the compound is characterized by pyrene monomer emission, but in poor solvent such as water, the emission is dominated by pyrene excimer emission. Quantitatively speaking, the ratio of the excimer emission to monomer emission changes from 50 to 0 when ECPS is dissolved in water and n-hexane, respectively. In contrast, for a commonly used polarity probe pyrene, the ratio of I3/I1 varies only from ~0.6 to ~1.7, where I3 and I1 stand for the intensities of the fluorescence emission at peak 3 and peak 1, respectively. This value suggests that a more powerful discriminating ability of the new compound in polarity sensing. Furthermore, unlike the main components of the compound, pyrene and cholesterol, its main chain is composed of multiple hydrophilic structures, and it is this structure that makes the emission of the compound in organic solvents sensitive to the presence of water. Accordingly, the applicability of the compound in determination of the trace amount of water in some organic solvents was evaluated. As expected, the detection limit of the compound toward water in acetonitrile reaches 7 ppm, a result never reached before. Furthermore, the fluorescence emission of the compound is also sensitive to viscosity variation. Therefore, it is assumed that ECPS may be used both as a polarity probe and a viscosity probe. On the bases of a series of steady-state and time-resolved fluorescence, as well as dynamic light scattering studies, a structural model was proposed to rationalize the fluorescence behavior of the compound in different solvents and its polarity and viscosity probing performances.

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Determination of Water in Slurries by Fiber-Optic Raman Spectroscopy

Cited by 11 publications

References 10 publications

Water Sensor for a Nonaqueous Solvent with Poly(1,5-diaminonapthalene) Nanofibers

Water Sensor for a Nonaqueous Solvent with Poly(1,5-diaminonapthalene) Nanofibers

Tunable luminescence of lanthanide (Ln = Sm, Eu, Tb) hydrophilic ionic polymers based on poly(N-methyl-4-vinylpyridinium-co-styrene) cations

A Butterfly-Shaped Pyrene Derivative of Cholesterol and Its Uses as a Fluorescent Probe

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