Results 261 to 270 of about 84,912 (298)
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Analytica Chimica Acta, 1972
Abstract Fluorescence-quenched solutions of palladium(II)-calcein and palladium(II)-calcein blue are shown to be sensitive spray reagents for the detection and in situ determination of organothiophosphorus insecticides on thin-layer chromatograms.
T F, Bidleman, B, Nowlan, R W, Frei
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Abstract Fluorescence-quenched solutions of palladium(II)-calcein and palladium(II)-calcein blue are shown to be sensitive spray reagents for the detection and in situ determination of organothiophosphorus insecticides on thin-layer chromatograms.
T F, Bidleman, B, Nowlan, R W, Frei
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Journal of the Chemical Society, Chemical Communications, 1980
A method for the determination of organolithium reagent is described using 2,5-dimethoxybenzyl alcohol as a self-indicating primary standard.
Mark R. Winkle +2 more
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A method for the determination of organolithium reagent is described using 2,5-dimethoxybenzyl alcohol as a self-indicating primary standard.
Mark R. Winkle +2 more
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Rapid determination of copper(I, II) ions using reagent indicator paper
Journal of Analytical Chemistry, 2009A rapid, sensitive, and highly selective test based on the reaction of copper(I) with thio-Michler’s ketone was developed for the detection and semiquantitative determination of 0.001–2 mg/L copper in natural and potable waters using preconcentration in a portable indicator device.
O. V. Gaiduk +3 more
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Rapid Test Determination of Iron(II) in Aqueous Media by Reagent Indicator Paper
Journal of Analytical Chemistry, 2004A reagent indicator paper with immobilized zirconyl hexacyanoferrate(III) is prepared for the preconcentration and determination of 0.05–500 mg/L of iron(II) in the presence of more than 100-fold amount of iron(III). The paper is stable in the presence of up to 200 mg/L of 1,1-dimethylhydrazine.
V. M. Ostrovskaya +3 more
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Photochemistry and Photobiology, 2006
ABSTRACTDirect detection of reactive oxygen species (ROS), especially singlet oxygen, in plants under stress conditions is of special importance, not only to identify primary events of oxidative damage, but also in studies exploring the potential role of ROS as signal molecules.
Eva, Hideg +4 more
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ABSTRACTDirect detection of reactive oxygen species (ROS), especially singlet oxygen, in plants under stress conditions is of special importance, not only to identify primary events of oxidative damage, but also in studies exploring the potential role of ROS as signal molecules.
Eva, Hideg +4 more
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The Journal of Organic Chemistry, 2002
9-Methylfluorene was tested as an indicator in the titration of commonly used organometallic reagents. This indicator is readily prepared in three steps from fluorenone. In THF solution the deprotonated indicator is red and exhibits a sharp endpoint.
Martina E, Bowen +2 more
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9-Methylfluorene was tested as an indicator in the titration of commonly used organometallic reagents. This indicator is readily prepared in three steps from fluorenone. In THF solution the deprotonated indicator is red and exhibits a sharp endpoint.
Martina E, Bowen +2 more
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Indicated vs. routine prenatal urine chemical reagent strip testing.
The Journal of reproductive medicine, 2007To determine if urinary tract infection, high blood pressure and gestational diabetes mellitus (GDM) are underdiagnosed when prenatal urine testing is done on a clinically indicated vs. routine basis.Prenatal and delivery records of 2,981 subjects were reviewed in a predominantly Hispanic and medically underserved population.
Mary Ann, Rhode +2 more
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Role of Frontier Molecular Orbital Symmetry of Reagents in Redox Catalytic Indicator Reactions
Journal of Analytical Chemistry, 2005Some hypotheses are discussed for the nature of “inhibited” or “kinetically hindered” redox reactions, which are employed as indicator reactions in kinetic analytical methods. Some reactions are considered as examples to demonstrate that redox reactions are kinetically hindered because the key frontier orbitals of the reagents differ in their symmetry ...
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Fresenius' Zeitschrift für analytische Chemie, 1967
A rapid titration procedure is recommended for the estimation of Na2S2O4 in commercial sodium dithionite (sodium hydrosulphite, sodium hyposulphite) and in aqueous solutions of this compound, using potassium hexacyanoferrate(III) as reagent and methylene blue as indicator.
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A rapid titration procedure is recommended for the estimation of Na2S2O4 in commercial sodium dithionite (sodium hydrosulphite, sodium hyposulphite) and in aqueous solutions of this compound, using potassium hexacyanoferrate(III) as reagent and methylene blue as indicator.
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