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Buffer solution

About: Buffer solution is a research topic. Over the lifetime, 6948 publications have been published within this topic receiving 112440 citations. The topic is also known as: pH buffer & buffer.


Papers
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Journal ArticleDOI
TL;DR: The results indicate that ascorbic acid degradation can be described successfully by a first order model during both conventional and ohmic heating, and shows that at a given power level, higher electric field strengths are conducive to increased incidence of faradaic reactions.

48 citations

Journal ArticleDOI
TL;DR: It was concluded that the dissolution was controlled by the diffusion of those species in the cement matrix, which was influenced by the structure of the matrix and the concentration of H+ ion at the cement surface.
Abstract: In order to clarify the mechanism for erosion of glass-ionomer cements, we immersed two commercial luting cements in an acidic buffer solution under various conditions. The amounts of F, Al, Si, and Ca eluted from the cement were (1) in proportion to the square root of immersion time, (2) unrelated to shape or volume of the sample, (3) dependent on its surface area, and (4) not affected by shaking of the solution. It was concluded that the dissolution was controlled by the diffusion of those species in the cement matrix, which was influenced by the structure of the matrix and the concentration of H+ ion at the cement surface. The unreacted glass particles near the cement surface were dissolved by the long immersion, and many pores were left in the surface region.

48 citations

Journal ArticleDOI
TL;DR: A poly(thionine)-modified basalplane pyrolytic graphite electrode, which can be prepared by a potential-sweep electrolysis of the corresponding monomer in acetonitrile media, shows an excellent electrocatalytic activity for NADH oxidation in phosphate buffer solutions (pH 6.9), with an activation overpotential which is ca. 400 mV lower than that of the bare electrode.
Abstract: A poly(thionine)-modified basal-plane pyrolytic graphite electrode, which can be prepared by a potential-sweep electrolysis of the corresponding monomer in acetonitrile media, shows an excellent electrocatalytic activity for NADH oxidation in phosphate buffer solutions (pH 6.9), with an activation overpotential which is ca. 400 mV lower than that of the bare electrode.

48 citations

Journal ArticleDOI
TL;DR: In this paper, a copper selective optical chemical sensor based on N, N ′-bis (salycilidene)-1,2-phenylenediamine (salophen) as ionophore was presented.

47 citations

Journal ArticleDOI
TL;DR: Time-resolved photoluminescence technique is utilized successfully in the heparin sensing to eliminate the background fluorescence interference effectively and enhance the sensing sensitivity in the complicated media.
Abstract: A series of hyper-branched cationic conjugated polyelectrolytes containing different contents of phosphorescent Ir(III) complex has been designed and synthesized successfully. Their photophysical properties in both aqueous solution and solid film are investigated and their morphologies in aqueous solution are observed by TEM. Nanoparticles with the size of 80–100 nm have been formed in aqueous solution through the self-assembly of polymers. An energy transfer process from host polyfluorene to guest Ir(III) complex exists and becomes more efficient in the solid films. Importantly, this series of hyper-branched polymers can be applied as light-up heparin probes with good selectivity, high sensitivity, and naked-eye detection through electrostatic interaction between polymers and heparin. Quantification for heparin in aqueous solution can be realized in the range of 0–44 μM in the buffer solution. Detection limit can reach as low as 50 nM. More meaningfully, time-resolved photoluminescence technique is utili...

47 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202317
202232
202185
2020151
2019220
2018245