About: Spectrophotometric investigation of the Acidity constants of fluorescein in various water-organic solvent media

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About: Spectrophotometric investigation of the Acidity constants of fluorescein in various water-organic solvent media Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We use a new procedure for estimating acid ionization constants of fluorescein using the spectrophotometric method at 25_C and at the constant ionic strength I 0.1M (KNO3) in pure water as well as in aqueous media containing variable percentages (10–50% w=v) of organic solvents. The used organic solvents were methanol, ethanol, N,N-dimethyl formamide, dimethyl sulfoxide, acetonitrile, and dioxane. The obtained results indicated that acidity constants decrease as the content of an organic solvent in the medium increases. The acidity constants of all related equilibria are estimated using the whole spectral fitting of the collected data. The DATAN program was applied for determination of acidity constants. The effects of various solvents on absorption properties and acidity constants of each component are also discussed. We use a new procedure for estimating acid ionization constants of fluorescein using the spectrophotometric method at 25_C and at the constant ionic strength I 0.1M (KNO3) in pure water as well as in aqueous media containing variable percentages (10–50% w=v) of organic solvents. The used organic solvents were methanol, ethanol, N,N-dimethyl formamide, dimethyl sulfoxide, acetonitrile, and dioxane. The obtained results indicated that acidity constants decrease as the content of an organic solvent in the medium increases. The acidity constants of all related equilibria are estimated using the whole spectral fitting of the collected data. The DATAN program was applied for determination of acidity constants. The effects of various solvents on absorption properties and acidity constants of each component are also discussed. (en) Zde publikujeme novou metodu pro odhad ionizační konstatny fluoresceinu za použití spektrofotometrické metody. Bylo pracováno za konstatní teploty 25°C a konstantantí iontové síly, měření probíhala ve vodných i směsných organických roztocích (metanol, etanol, N, N-dimethyl formamid, dimethyl sulfoxidu, acetonitril a dioxan). Bylo zjištěno, že ionizační konstanta klesá s obsahem organických rozpouštědel (cs)
Title	Spectrophotometric investigation of the Acidity constants of fluorescein in various water-organic solvent media Spektrofotometrické zkoumání konstatny kyselosti fluoresceinu v různých vodních a organických rozpouštědlech (cs) Spectrophotometric investigation of the Acidity constants of fluorescein in various water-organic solvent media (en)
skos:prefLabel	Spectrophotometric investigation of the Acidity constants of fluorescein in various water-organic solvent media Spektrofotometrické zkoumání konstatny kyselosti fluoresceinu v různých vodních a organických rozpouštědlech (cs) Spectrophotometric investigation of the Acidity constants of fluorescein in various water-organic solvent media (en)
skos:notation	RIV/86652036:_____/08:00323597!RIV09-AV0-86652036
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z50520701)
http://linked.open...iv/cisloPeriodika	10
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Kubista, Mikael
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Biotechnologický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	396457
http://linked.open...ai/riv/idVysledku	RIV/86652036:_____/08:00323597
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Acid ionization constant; acidy; fluorecein (en)
http://linked.open.../riv/klicoveSlovo	Acid ionization constant acidy fluorecein
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[BA79121F972C]
http://linked.open...i/riv/nazevZdroje	Chemical Engineering Communications
http://linked.open...in/vavai/riv/obor	EB
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	195
http://linked.open...iv/tvurceVysledku	Kubista, Mikael Amini, A. Bozorgzad, S. Ghasemi, J. Niazi, A. Yazdanipour, A.
http://linked.open...ain/vavai/riv/wos	000257226100006
http://linked.open...n/vavai/riv/zamer	Establishing of the Biotechnology Institute ASCR
issn	0098-6445
number of pages	12 (xsd:int)

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