Gas chromatographic determination of dissolved hydrogen and oxygen in photolysis of water

Valenty, S. J.

doi:10.1021/ac50026a038

Cited by 19 publications

(7 citation statements)

References 8 publications

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“…There are many established methods for the detection of oxygen, which include the Clark electrode [3] and gas chromatography [4], however, such methods are too expensive and time consuming to allow 100% quality assurance.…”

Section: Introductionmentioning

confidence: 99%

UV‐Activated Luminescence/Colourimetric O₂ Indicator

Mills

Tommons

Bailey

et al. 2008

International Journal of Photoenergy

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An oxygen indicator is described, comprising nanoparticles of titania dispersed in hydroxyethyl cellulose (HEC) polymer film containing a sacrificial electron donor, glycerol, and the redox indicator, indigo-tetrasulfonate (ITS). The indicator is blue- coloured in the absence of UV light, however upon exposure to UV light it not only loses its colour but also luminesces, unless and until it is exposed to oxygen, whereupon its original colour is restored. The initial photobleaching spectral (absorbance and luminescence) response characteristics in air and in vacuum are described and discussed in terms of a simple reaction scheme involving UV activation of the titania photocatalyst particles, which are used to reduce the redox dye, ITS, to itsleucoform, whilst simultaneously oxidising the glycerol to glyceraldehye. The response characteristics of the activated, that is, UV photobleached, form of the indicator to oxygen are also reported and the possible uses of such an indicator to measure ambientO2levels are discussed.

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Section: Introductionmentioning

confidence: 99%

UV‐Activated Luminescence/Colourimetric O₂ Indicator

Mills

Tommons

Bailey

et al. 2008

International Journal of Photoenergy

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“…1,2 There are many established methods for the detection and measurement of oxygen, including the Clark electrode, 1 and gas chromatography. 3 However, such systems are usually expensive, both in terms of initial capital outlay and running costs, and so there is increasing interest in inexpensive and disposable sensor technologies, such as that offered by optical sensors. 4 Not surprisingly, the most studied of all the optical sensors are those for oxygen.…”

Section: Introductionmentioning

confidence: 99%

Novel UV-Activated Colorimetric Oxygen Indicator

2005

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The results of a detailed characterization study of a novel UV-activated colorimetric oxygen indicator are described. The indicator uses nanoparticles of titania to photosensitize the reduction of methylene blue by triethanolamine in a polymer encapsulation medium, using UVA light. Upon UV irradiation, the indicator bleaches and remains in this colorless state in the dark, unless and until it is exposed to oxygen, whereupon its original color is restored. The indicator is reusable and irreversible. The rate of color recovery is proportional to the level of oxygen present. A layer of PET (poly(ethylene terephthalate)), of thickness b, placed on top of the indicator film slows down its response, and the 90% recovery time is proportional to b.

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“…The analysis of the reaction mixtures for dissolved hydrogen by gas chromatography showed not even trace amounts of hydrogen were produced. 19 When it is remembered that dissolved 4 could sensitize the reduction of MV2+, that 4 is electroactive and can do redox chemistry, and that 4 adsorbs visible light, it is clear that the failure of the polyquinoline membrane to sensitize the reduction of water is due to the hydrophobicity of the polymer. Undoubtedly, the aqueous relays were not able to diffuse into the polymer to the ruthenium centers.…”

Section: Resultsmentioning

confidence: 99%

Polyquinoline-supported ruthenium complex for the photochemical reduction of water

Stoessel¹,

Stille²

1992

Macromolecules

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A polyquinoline containing a bipyridyl link in the polymer backbone was coordinated to a ruthenium center to form a tris(bipyridyl)ruthenium complex. The polymer and corresponding model complexes were characterized and then assessed for its photosensitizing ability. The model, 3, and dissolved polymer 4 both sensitized the photoreduction of methyl viologen in a sacrificial system. The polymer was then examined for its suitability as a photosensitizing membrane in a water photolysis cell.

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Gas chromatographic determination of dissolved hydrogen and oxygen in photolysis of water

Cited by 19 publications

References 8 publications

UV‐Activated Luminescence/Colourimetric O₂ Indicator

UV‐Activated Luminescence/Colourimetric O₂ Indicator

Novel UV-Activated Colorimetric Oxygen Indicator

Polyquinoline-supported ruthenium complex for the photochemical reduction of water

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Gas chromatographic determination of dissolved hydrogen and oxygen in photolysis of water

Cited by 19 publications

References 8 publications

UV‐Activated Luminescence/Colourimetric O2 Indicator

UV‐Activated Luminescence/Colourimetric O2 Indicator

Novel UV-Activated Colorimetric Oxygen Indicator

Polyquinoline-supported ruthenium complex for the photochemical reduction of water

Contact Info

Product

Resources

About

UV‐Activated Luminescence/Colourimetric O₂ Indicator

UV‐Activated Luminescence/Colourimetric O₂ Indicator