A new electrochemical method for trace water determination in methanol

Ga̧siorowska, Monika; Soroka, Jacek A.; Sawicka, Marta J.; Wróblewska, E. K.

doi:10.1016/j.talanta.2008.10.036

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…The concentration of the fluid phase was measured via a Genway 4510 conductivity meter (Gasiorowska et al 2009), taking account of the fact that solutions with different amounts of water but containing the same amount of salt show different conductivities. Conductiometric measurement of the amount of water in the ethanol/water mixture led to an easy determination of the end-point of the experiments when the adsorbent capacity was saturated.…”

Section: Adsorption Systemmentioning

confidence: 99%

Effect of Cation Exchange on the Performance of Clinoptilolite Mineral in the Ethanol Dewatering Process

Pourreza

Sharifnia

Khatamian

et al. 2011

Adsorption Science & Technology

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This study describes the effect of cation exchange (Ni 2+ and Ca 2+ ) on the adsorption capacity and breakthrough time of a natural zeolite (clinoptilolite) employed in the ethanol dewatering process. The results obtained showed that modification of clinoptilolite (Clin) by cation exchange led to a decrease in the breakthrough time and water adsorption capacity in the order: Ca-Clin > Ni-Clin > Clin. In addition, characterization of the prepared clinoptilolite samples by BET, XRD and SEM techniques showed that no degradation of crystallinity had occurred, although the pore volumes of both cation-exchanged samples had increased as well as the surface area of the Ni-Clin sample.

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Section: Adsorption Systemmentioning

confidence: 99%

Effect of Cation Exchange on the Performance of Clinoptilolite Mineral in the Ethanol Dewatering Process

Pourreza

Sharifnia

Khatamian

et al. 2011

Adsorption Science & Technology

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“…The detection and quantication of water in organic solvents are critical in chemical processes, industrial applications, and the quality control of products. 1 The water content in organic solvents has been determined using Karl Fischer titration, 2,3 gas chromatography (GC), 4,5 electrochemistry, [6][7][8] and 1 H NMR spectroscopy. 9 However, these techniques require moisture-free conditions, expensive and sophisticated instruments, and highly qualied personnel.…”

Section: Introductionmentioning

confidence: 99%

Simple colorimetric paper-based test strip for point-of-use quality testing of ethanol-based hand sanitizers

El-Hassanein,

Mansour,

Hammad

et al. 2024

RSC Adv.

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“…In the bargain, this method requires extensive use of costly and hazardous chemicals such as pyridine, midazolam salt reagents, iodine, alkyl sulfates and methanol, thus limiting its practical application in water content determination. [6] Furthermore, the methods for detecting trace water include electrochemical method, [7,8] photometric method, [9] gas chromatography, [10,11] fluorescence spectroscopy, [12][13][14] etc. The sensitivity of water detection is limited by the trace moisture present in organic solvents, which cannot be completely separated, and the significant influence of the chemical properties of these solvents.…”

Section: Introductionmentioning

confidence: 99%

Determination of Trace Water Using Fluorescence Probes Based on Nitrogen‐Doped Carbon Quantum Dot Fluorescence Senors (Y‐CDs and R‐CDs)

Yang,

Chen

et al. 2023

ChemistrySelect

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In this work, we reported two nitrogen doped carbon quantum dot fluorescence sensors (Y‐CDs and R‐CDs) with good stability and luminescence efficiency, which can be quickly, sensitively and low‐cost for the determination of trace water content in organic solvents. Using o‐phenylenediamine and p‐phenylenediamine as nitrogen sources and terephthalic acid as carbon sources, the preparation was carried out through simple solvothermal synthesis and heteroatom doping. The luminescence characteristics and interaction mechanism with the target were discussed. The results indicate that the two carbon dots can effectively quench the water content in acetone, ethanol, and DMF, as well as physical interactions such as hydrogen bonding and dynamic quenching, which are the reasons for the observed quenching effect. Based on this, a new method for determining water content in organic solvents using carbon quantum dot fluorescence probes has been established. The linear relationship between the fluorescence quenching efficiency F0/F of two carbon quantum dots and the water content in different organic solvents was studied. The detection limits (LOD) of water in acetone, ethanol and N,N‐dimethylformamide (DMF) were 0.17 %, 2.35 %, 0.26 %, respectively, determined by Y‐CDs. The LOQ of acetone, ethanol, and DMF were 0.554 %, 7.83 %, 0.855 %, respectively. The LOD of water in acetone, ethanol and DMF determined by R‐CDs were 0.056 %, 0.69 %, 0.27 % and the LOQ was 0.187 %, 2.290 %, 0.909 %, respectively. Good recovery rates and precision were achieved in practical applications.

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A new electrochemical method for trace water determination in methanol

Cited by 6 publications

References 14 publications

Effect of Cation Exchange on the Performance of Clinoptilolite Mineral in the Ethanol Dewatering Process

Effect of Cation Exchange on the Performance of Clinoptilolite Mineral in the Ethanol Dewatering Process

Simple colorimetric paper-based test strip for point-of-use quality testing of ethanol-based hand sanitizers

Determination of Trace Water Using Fluorescence Probes Based on Nitrogen‐Doped Carbon Quantum Dot Fluorescence Senors (Y‐CDs and R‐CDs)

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