Results 261 to 270 of about 1,944,422 (285)
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Revisiting the nitrite reductase activity of hemoglobin with differential pulse voltammetry
Analytica Chimica Acta, 2020Nitric oxide (NO) is an omnipresent signalling molecule in all vertebrates. NO modulates blood flow and neural activity. Nitrite anion is one of the most important sources of NO. Nitrite is reduced to NO by various physiological mechanisms including reduction by hemoglobin in vascular system.
Hamid Fini, Kagan Kerman
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Determination of indole in shrimps by differential-pulse voltammetry in an emulsified medium
The Analyst, 1990A method has been developed to determine indole in shrimps by differential-pulse voltammetry at a Pt electrode in an emulsified medium, after extraction into hexane - ethyl acetate (49 + 1). The standard additions method was used in order to minimise the matrix effect.
J M, Pingarrón Carrazón +2 more
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Differential pulse adsorptive stripping voltammetry of osmium-modified peptides
Bioelectrochemistry, 2002Complexes of osmium tetroxide with nitrogen ligands were developed and used in our laboratory as probes of the DNA structure. Here, we show that the complex of osmium tetroxide with 2,2'-bipyridine (Os,bipy) can be used for modification and electrochemical detection of proteins at neutral pH.
Sabina, Billová +2 more
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Simultaneous determination of three herbicides by differential pulse voltammetry and chemometrics
Journal of Environmental Science and Health, Part B, 2011A novel differential pulse voltammetry method (DPV) was researched and developed for the simultaneous determination of Pendimethalin, Dinoseb and sodium 5-nitroguaiacolate (5NG) with the aid of chemometrics. The voltammograms of these three compounds overlapped significantly, and to facilitate the simultaneous determination of the three analytes ...
Ni, Yongnian, Wang, Lin, Kokot, Serge
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Determination of lead in paint by differential-pulse anodic-stripping voltammetry
The Analyst, 1978A procedure for the determination of lead in paints by differential-pulse anodic-stripping voltammetry is presented. Only a few milligrams of sample are required for the analysis. Dry ashing with sodium carbonate as the flux has been found to be a simple and effective method for the destruction of the organic matrix. Samples of the dried paint of small
P C, Lai, K W, Fung
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Talanta, 1986
This work describes optimal conditions for the determination of chlorpromazine and thioridazine by DPV, with a detection limit of 4.0 x 10(-7)M (0.16 microg/ml). The well-defined peaks indicate that direct measurement in a medium of 0.03 M perchloric acid in acetonitrile is possible and the use of DPV is advantageous when small amounts are to be ...
N, Zimová, I, Nemec, J, Zima
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This work describes optimal conditions for the determination of chlorpromazine and thioridazine by DPV, with a detection limit of 4.0 x 10(-7)M (0.16 microg/ml). The well-defined peaks indicate that direct measurement in a medium of 0.03 M perchloric acid in acetonitrile is possible and the use of DPV is advantageous when small amounts are to be ...
N, Zimová, I, Nemec, J, Zima
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Direct determination of lead in blood by differential pulse stripping voltammetry
Clinica Chimica Acta, 1987A simple and rapid method for determination of lead in blood by differential pulse stripping voltammetry (DPS) without preliminary mineralization of the sample, is described. Lead determination was performed in native samples of blood in the electrolyte of Britton-Robinson buffer (pH 5-5.5).
M, Nedeljković +3 more
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Journal of Pharmaceutical and Biomedical Analysis, 2003
A differential-pulse adsorptive stripping voltammetric method for the determination of trace amounts of the antibacterial trovafloxacin (TRFLX) is proposed. The optimal experimental parameters for the drug assay were: accumulation potential=-0.30 V (vs.
José Luis, Vílchez +3 more
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A differential-pulse adsorptive stripping voltammetric method for the determination of trace amounts of the antibacterial trovafloxacin (TRFLX) is proposed. The optimal experimental parameters for the drug assay were: accumulation potential=-0.30 V (vs.
José Luis, Vílchez +3 more
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Determination of gallium traces by differential pulse anodic stripping voltammetry
Fresenius' Zeitschrift für analytische Chemie, 1988The determination of gallium traces is carried out on the hanging drop mercury electrode in solutions of low ionic strength and in absence of complexing agents. At pH=3.2, where stable solutions are obtained, concentrations of 0.2 μg Ga l−1 are determinated with a standard deviation of 0.96% and a detection limit of 4 ng Ga l−1.
UDISTI, ROBERTO, PICCARDI, GIOVANNI
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Determination of chlorite in drinking water by differential pulse voltammetry on graphite
Analytical and Bioanalytical Chemistry, 2004The chlorite ion is an unavoidable by-product of the disinfection of drinking water by means of chlorine dioxide. The maximum concentration values of chlorite accepted in many countries' regulations range from 0.2 to 1.0 mg L(-1). A simple, inexpensive and quickly set up voltammetric procedure for the on-site determination of chlorite in drinking water
PEZZATINI, GIOVANNI +4 more
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