Results 221 to 230 of about 273,868 (276)
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Colorimetric Sensor Based AgNPs for the Detection of Cyanide using UV‐Vis Spectrophotometry
ChemistrySelect, 2023Abstract Cyanide (CN − ) is known to be a very harmful ion that may accumulate in the air, soil and water, and become a critical risk to organisms, even at trace levels. Hence, it is very critical to develop sensitive and accurate analytical methods for the determination of ...
Ayça Girgin +4 more
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UV/Vis Spectrophotometry and UV Imaging
2016The 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 ...
Jesper Østergaard
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Application of UV–VIS spectrophotometry for chemical analysis
Chemical Analysis and Material Characterization by Spectrophotometry, 2020B. Kafle
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Journal of Aquatic Food Product Technology, 2021
Because Goa is a favorite destination for international and national tourism, there is a great demand for seafood there. Formalin (30–40% of formaldehyde, FA) can be added as a preservative to many fishery products to extend shelf life.
Joette Valadares, M. Majik, S. Tilve
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Because Goa is a favorite destination for international and national tourism, there is a great demand for seafood there. Formalin (30–40% of formaldehyde, FA) can be added as a preservative to many fishery products to extend shelf life.
Joette Valadares, M. Majik, S. Tilve
semanticscholar +1 more source
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2020
A novel and environmentally-friendly method, which includes determination of trace amounts of quercetin in samples by using UV-vis spectrophotometry after enrichment with amine-based liquid phase microextraction (LPME), has been developed.
M. Soylak, B. Ozdemir, E. Yılmaz
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A novel and environmentally-friendly method, which includes determination of trace amounts of quercetin in samples by using UV-vis spectrophotometry after enrichment with amine-based liquid phase microextraction (LPME), has been developed.
M. Soylak, B. Ozdemir, E. Yılmaz
semanticscholar +1 more source
, 2021
This work reports for the first time, the acidity constant (pKa) values, in aqueous media, of four anthraquinones, namely: quinizarin (pKa1 = 10.83 ± 0.02, pKa2 = 12.03 ± 0.02); anthrarufin (pKa1 = 10.93 ± 0.02, pKa2 = 12.49 ± 0.02); chrysazine (pKa1 = 8.
A. K. Rivas-Sánchez +4 more
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This work reports for the first time, the acidity constant (pKa) values, in aqueous media, of four anthraquinones, namely: quinizarin (pKa1 = 10.83 ± 0.02, pKa2 = 12.03 ± 0.02); anthrarufin (pKa1 = 10.93 ± 0.02, pKa2 = 12.49 ± 0.02); chrysazine (pKa1 = 8.
A. K. Rivas-Sánchez +4 more
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High‐Resolution, Higher‐Order UV/VIS Derivative Spectrophotometry
Angewandte Chemie International Edition in English, 1978AbstractDerivative spectrophotometry has gained increasing importance in the past two years and is currently experiencing vigorous development. Following and introduction the present article provides a review of this extremely effective method. In particular, the advantages ofhigher‐order derivative spectrophotometry (HODS method,n> 2) are discussed
Gerhard Talsky +2 more
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Determination of Saturated Ketoconazole Solubility Using Spectrophotometry Uv-Vis Method
Research Journal of Pharmacy and Technology, 2022Ketoconazole is a weakly basic drug that has lower solubility at higher pH. Determination of solubility of ketoconazole in the base solution is not easy due to the poor solubility. The simple, low cost, efficient, accurate spectrophotometry methods in UV/VIS region have been developed for the determination of ketoconazole. The wavelengths were selected
Viviane Annisa +3 more
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International Journal of Environmental Analytical Chemistry, 2020
In this research, a simple, green, sensitive and fast method was developed based on deep eutectic solvent dispersive liquid-liquid microextraction (DES-DLLME) to extract trace amount of Cr(VI) from water samples followed by spectrophotometry ...
Mahsa Pourmohammad +2 more
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In this research, a simple, green, sensitive and fast method was developed based on deep eutectic solvent dispersive liquid-liquid microextraction (DES-DLLME) to extract trace amount of Cr(VI) from water samples followed by spectrophotometry ...
Mahsa Pourmohammad +2 more
semanticscholar +1 more source
Determination of olmesartan medoxomil in tablets by UV-Vis spectrophotometry.
Die Pharmazie, 2007A simple, rapid and reliable UV spectrophotometric method was developed for the determination of olmesartan medoxomil in pharmaceutical dosage forms. The solutions of standard, tablet and synthetic tablet were prepared in acetonitrile and in NaOH-Water. 258 nm and 250 nm were chosen for acetonitrile and for NaOH-Water solutions respectively.
Celebier, M., Altinoz, S.
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