Determination of water

Harris, C

doi:10.1016/0039-9140(72)80226-1

Cited by 30 publications

(8 citation statements)

References 25 publications

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“…The detection and determination of water are of great importance in industrial applications, including food inspection, biomedical and environmental monitoring, and manufacturing of pharmaceutical, electronic, and petroleum products. 1 In synthetic chemistry, the presence of water in organic solvents causes serious problems, such as generation of by-products, quenching of reactions, lowering of the product yields, and furthermore, catastrophic dangers of re and explosion. Particularly, in a large-scale industrial process, careful attention is paid to this impurity to avoid worst-case scenarios.…”

Section: Introductionmentioning

confidence: 99%

Development of an intramolecular charge transfer-type colorimetric and fluorescence sensor for water by fusion with a juloidine structure and complexation with boron trifluoride

2019

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Section: Introductionmentioning

confidence: 99%

Development of an intramolecular charge transfer-type colorimetric and fluorescence sensor for water by fusion with a juloidine structure and complexation with boron trifluoride

2019

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“…There are tremendous efforts have been dedicated for the quantification and tracing water (or humidity) conductivity accurately and efficient in the past decades 3, 4 . It was demonstrated that the Karl Fischer titration is a representative way to detect water content 5 . This traditional approach can detect water content accurately, however, the long processing time and usage of toxic and smelly reagents are considered as the significant limitations.…”

Section: Introductionmentioning

confidence: 99%

A green route to prepare fluorescent and absorbent nano-hybrid hydrogel for water detection

Wang

Qing

Yan

et al. 2017

Sci Rep

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An environment-friendly fluorescent nano-hybrid hydrogel has been synthesized successfully, from cellulose nanocrystal (CNC), acrylic acid (AA) and phosphorescent Eu2+/Dy3+ doped SrAl2O4 via free radical polymerization. The hydrogel network matrix fixed Eu2+/Dy3+ doped SrAl2O4 nanoparticles by polymer chains with coordinate bonds that prevented particles from aggregating and quenching in water. The fluorescent nano-hybrid hydrogel exhibited extremely high water absorption of which the swelling ratio in distilled water and NaCl salt solution were respectively of 323.35 g/g and 32.65 g/g. Furthermore, the hydrogel displayed excellent water retention property that can keep half of the moisture even exposed to 80 °C for 210 min. Besides, the hydrogel had bright green fluorescence under the sunlight or ultraviolet excitation, and the fluorescence intensity was up to 125477 after swelling 50 times in water. The time-resolved photoluminescence (TRPL) afterglow decay examination showed that the fluorescent emission persisted for 4 h after hydrogels excited at 368 nm wavelength UV-light for 10 min. The fluorescence intensity behaved significant linear relationship with the swelling ratio. As a result, these hydrogels were considered as promising candidates for the preparation of stable and sensitive sensor materials in green water detection.

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“…The mechanism that Fischer originally proposed stems from the benzene experiments, for in his publication he assumes that one mole of iodine is equivalent to two moles of water: I2 + 2H20 + PY2 " SO2 + 2 Py -~ (PYH)2SO4 + 2 PyHI (1) Later investigations by Mitchell and Smith [ 3] showed that in alcoholic solutions one mole of iodine is equivalent to one mole of water. They proposed the following two-step overall mechanism Py'i 2 "e PF.SO 2 + I~ + H20 --~ 2 I~'HI +…”

Section: Introductionmentioning

confidence: 99%