Results 121 to 130 of about 21,988 (160)

Mathematical calculations of iron complex stoichiometry by direct UV–Vis spectrophotometry

Bioorganic Chemistry, 2013
The effects of iron-chelating agents on miscellaneous pathologies are currently largely tested. Due to various indications, different properties for chelators are required. A stoichiometry of the complex in relation to pH is one of the crucial factors.
Tomáš, Filipský, Michal, Říha, Radomír, Hrdina, Kateřina, Vávrová, Přemysl, Mladěnka   +4 more
openaire   +2 more sources

Determination of Trace Elements Using UV–Vis Spectrophotometry

2022
The popularity of UV–vis spectrophotometric methods in trace element analysis arises from their modest apparative requirements, possibility of use by a moderately trained analyst, at least in developing countries, an adequate sensitivity and an accuracy often as good as, if not better than, that of other methods in the same range.
openaire   +1 more source

Polymer analysis by higher-order UV/VIS-derivative spectrophotometry

Polymer Bulletin, 1980
High resolution higher-order UV/VIS derivative spectrophotometry (HODS) has been used for some selected analytical problems of polymers, such as copolymer composition, determination of unconverted monomer in polymer and analysis of polymer additives.
Oskar Nuyken, Gerhard Talsky
openaire   +1 more source

UV/VIS SPECTROPHOTOMETRY FOR THE EVALUATION OF BINDER-AGGREGATE INTERACTIONS

Fuel Science and Technology International, 1992
ABSTRACT UV/VIS absorption spectra of a few bitumens and their main generic fractions obtained by liquid chromatography have been recorded. Major or minor differences have been found depending on the nature of the bitumen and the generic fraction considered. Those differences are a valuable help in interpreting measurements of binder-aggregate affinity.
openaire   +1 more source

UV/Vis Spectrophotometry and UV Imaging

2016
The present chapter describes typical instrumentation and principles of UV/Visible spectrophotometry and UV imaging measurements. The absorption of light as a function of wavelength depends on the structural properties of molecules as well as the solvent in which they are dissolved, including solvent polarity, pH, temperature and the presence of ...
openaire   +1 more source

Qualitative aspects of UV-vis spectrophotometry of beta-carotene and lycopene

Journal of Chemical Education, 1989
The aim of this paper is to use qualitative aspects of UV-vis spectrophotometry to understand structural behavior of these plyenic pi systems.
Barrie Tan, David N. Soderstrom
openaire   +1 more source

Application of the UV–vis spectrophotometry method for the determination of glutamate in the cerebrospinal fluid of rats

Journal of Pharmaceutical and Biomedical Analysis, 2020
In experimental nociception models, there is an increase in the glutamate cerebrospinal fluid (CSF) and a decrease in its levels in analgesic treatments. For the determination of glutamate in CSF, an analytical UV spectrophotometric method was developed and validated.
Cirley Pinheiro, Ferreira, Flavia Tasmim, Techera Antunes, Isadora Nunes, Rebelo, Claudio Antônio, da Silva, Fernanda Nunes, Vilanova, Dione Silva, Corrêa, Alessandra Hubner, de Souza   +6 more
openaire   +2 more sources

Stationary cuvette: a new approach to obtaining analytical curves by UV–VIS spectrophotometry

Phytochemical Analysis, 2009
AbstractBackgroundInvestigations in the field of pharmaceutical analysis and quality control of medicines require analytical procedures that achieve suitable performance. An analytical curve is one of the most important steps in the chemical analysis presenting a direct relationship to features such as linearity.ObjectiveThis study has the aim of ...
K G H, Silva, F H Xavier, Júnior, I E G, Farias, A K A, Silva, J A Caldas, Neto, L C A, Souza, R R, Santiago, F Alexandrino, Júnior, T Nagashima, Júnior, L A L, Soares, N S, Santos-Magalhães, E S T, Egito   +11 more
openaire   +2 more sources

In-vitro Equilibrium Phosphate Binding Study of Sevelamer Carbonate by UV-Vis Spectrophotometry

Drug Research, 2018
AbstractSevelamer carbonate is a cross-linked polymeric amine; it is the active ingredient in Renvela® tablets. US FDA provides recommendation for demonstrating bioequivalence for the development of a generic product of sevelamer carbonte using in-vitro equilibrium binding study.
Budi, Prasaja, M Maulana, Syabani, Endah, Sari, Uci, Chilmi, Prawitasari, Cahyaningsih, Theresia Weliana, Kosasih   +5 more
openaire   +2 more sources

[On-line coupling of microcolumn electrophoresis and UV-Vis spectrophotometry].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
In the present paper, a laboratory-made high-performance electrophoresis microcolumn unit was prepared for UV-Vis spectrophotometer. X-ray diffraction was used in the preparation of electrophoretic microcolumns. And an analytical technique of microcolumn electrophoresis coupled with UV-Vis spectrophotometry was introduced. Uniform quartz microncrystals
Lian, Li, You-Zhao, He, Wu-Er, Gan, Xiao-Kui, Wang, Hai-Yang, Xie, Yong, Gao   +5 more
openaire   +1 more source