Platinum black coated microdisk electrodes for the determination of high concentrations of hydrogen peroxide in phosphate buffer solutions

Talanta ◽  
2006 ◽  
Vol 68 (5) ◽  
pp. 1632-1639 ◽  
Author(s):  
A KICELA ◽  
S DANIELE
Keyword(s):  
Hydrogen Peroxide ◽  
Phosphate Buffer ◽  
Platinum Black ◽  
Buffer Solutions ◽  
High Concentrations

Amperometric determination of hydrogen peroxide using a copper microelectrode

2014 ◽  
Vol 6 (7) ◽  
pp. 2112-2116 ◽  
Author(s):  
L. M. F. Dantas ◽  
P. S. Castro ◽  
R. C. Peña ◽  
M. Bertotti
Keyword(s):  
Hydrogen Peroxide ◽  
Phosphate Buffer ◽  
Cathodic Reduction ◽  
Amperometric Determination ◽  
Buffer Solutions

The cathodic reduction of hydrogen peroxide at copper microelectrodes was investigated in phosphate buffer solutions.

scholarly journals Simultaneous Determination of Kynurenine and Kynurenic Acid by High-Performance Liquid Chromatography Photoirradiation System Using a Mobile Phase Containing 18-crown-6

2019 ◽  
Vol 12 ◽  
pp. 117864691983455
Author(s):  
Motomasa Atsumi ◽  
Ken-ichi Mawatari ◽  
Akari Morooka ◽  
Makoto Yasuda ◽  
Tomoko Fukuuchi ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Phosphate Buffer ◽  
Mobile Phase ◽  
High Performance ◽  
Kynurenic Acid ◽  
Fluorometric Determination ◽  
The Mean

A high-performance liquid chromatography (HPLC) system has been developed for the fluorometric determination of kynurenine (KYN) and kynurenic acid (KYNA) in human serum using a mobile phase containing 18-crown-6. A retention time of KYNA was adjusted with pH of phosphate buffer in 18-crown-6. KYN and KYNA were separated on a CAPCELLPAK C18 (250 × 4.6 mm i.d.). The mobile phase consisted of 35 mmol/L phosphate buffer (pH 8.0)/methanol (85/15, v/v) containing 35 mmol/L hydrogen peroxide and 10 mmol/L 18-crown-6. The retention times of KYN and KYNA were 18and 24 minutes, respectively. The calibration graphs of KYN and KYNA were linear over the range 180 to 2900 and 1 to 84 nmol/L by injecting a 50-μL volume of KYN and KYNA, respectively. Pretreatment of serum was achieved by deproteinization only. The mean recoveries of KYN and KYNA from serum were more than 97%.

Effect of phosphate buffer solutions on the reactions of glutathione with hydrogen peroxide and peroxyl radicals

2019 ◽  
Vol 68 (7) ◽  
pp. 1441-1444 ◽  
Author(s):  
K. M. Zinatullina ◽  
O. T. Kasaikina ◽  
V. A. Kuzmin ◽  
N. P. Khrameeva ◽  
L. M. Pisarenko
Keyword(s):  
Hydrogen Peroxide ◽  
Phosphate Buffer ◽  
Peroxyl Radicals ◽  
Buffer Solutions

Graphene-modified electrode. Determination of hydrogen peroxide at high concentrations

2013 ◽  
Vol 405 (11) ◽  
pp. 3579-3586 ◽  
Author(s):  
Fabio Terzi ◽  
Jonathan Pelliciari ◽  
Chiara Zanardi ◽  
Laura Pigani ◽  
Antti Viinikanoja ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Modified Electrode ◽  
High Concentrations

scholarly journals Enhanced bleaching effect of bovine tooth by hydrogen peroxide via calcium phosphate spheres

2018 ◽  
Keyword(s):  
Hydrogen Peroxide ◽  
Calcium Phosphate ◽  
Hydrothermal Method ◽  
Phosphate Buffer ◽  
Bleaching Effect ◽  
Whitening Effect ◽  
Buffer Solutions

In the study, calcium phosphate spheres (CPS) were prepared using phosphate buffer solutions by hydrothermal method and were used to manufacture a lab-made bleaching paste. The obtained paste was used to whiten bovine teeth in order to investigate whitening effect with CPS in the paste. The results showed that the bleaching paste made by CPS does not affect bleaching effect of hydrogen peroxide (HP). On the contrary, it can prolong the bleaching effect compared the pure HP.

Freeze-fracture, freeze-etch complementary pairs of virus-infected cells reveal value of etching even when relatively high concentrations of cryoprotectants are used

1978 ◽  
Vol 36 (2) ◽  
pp. 136-137
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe
Keyword(s):  
Plant Tissue ◽  
Phosphate Buffer ◽  
Infected Plant ◽  
Freeze Fracture ◽  
Distilled Water ◽  
Virus Infected Plant ◽  
Infected Cells ◽  
High Concentrations

It has been assumed by many involved in freeze-etch or freeze-fracture studies that it would be useless to etch specimens which were cryoprotected by more than 15% glycerol. We presumed that the amount of cryoprotective material exposed at the surface would serve as a contaminating layer and prevent the visualization of fine details. Recent unexpected freeze-etch results indicated that it would be useful to compare complementary replicas in which one-half of the frozen-fractured specimen would be shadowed and replicated immediately after fracturing whereas the complement would be etched at -98°C for 1 to 10 minutes before being shadowed and replicated.Standard complementary replica holders (Steere, 1973) with hinges removed were used for this study. Specimens consisting of unfixed virus-infected plant tissue infiltrated with 0.05 M phosphate buffer or distilled water were used without cryoprotectant. Some were permitted to settle through gradients to the desired concentrations of different cryoprotectants.

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