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Determination of Pharmaceuticals by UV-Visible Spectrophotometry
Current Pharmaceutical Analysis, 2021Pharmaceuticals are the chemical molecules which were invented to improve the life of living things through diagnosing, curing, treating, or preventing diseases. Pharmaceuticals can do their maximum function or work against disease or prevent from harmful effects of diseases only if they are free from impurities.
Avvaru Praveen Kumar, Deepak Kumar
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Spectrophotometry of a Galaxy with UV-excess
Astrophysics, 1995We present the results of a spectral study of Galaxy No. 47 of the list [1]. We determine the equivalent widths of the lines for the compact part of the galaxy and the relative intensities for both the compact part and the halo. We estimate the mass of the galaxy from the inclination of the Hα line.
M. A. Kazaryan, E. L. Karapetyan
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Determination of zopiclone in tablets by HPLC and UV-spectrophotometry
Journal of Pharmaceutical and Biomedical Analysis, 2000Rapid, simple and accurate chromatographic (HPLC) and spectrophotometric methods for the determination of zopiclone in tablets were elaborated. Acetonitrile was found to be a suitable extraction solvent. The samples were chromatographed on Nova-Pak C18 column and UV detection at 304 nm.
B, Paw, G, Misztal
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1987
The visible region of the spectrum ranges from 400–700 nm, which corresponds to frequencies of 7 × 1014–4 × 1014 Hz. Radiation at the low-energy high-wavelength end of the spectrum is perceived as red, while that at the high-energy part of the spectrum is blue. The spectral region between 180–400 nm corresponds to the ultraviolet (UV) region.
M. H. Gordon, R. Macrae
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The visible region of the spectrum ranges from 400–700 nm, which corresponds to frequencies of 7 × 1014–4 × 1014 Hz. Radiation at the low-energy high-wavelength end of the spectrum is perceived as red, while that at the high-energy part of the spectrum is blue. The spectral region between 180–400 nm corresponds to the ultraviolet (UV) region.
M. H. Gordon, R. Macrae
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Diphenylhydantoin Microdetermination in Serum and Plasma by UV Spectrophotometry
Journal of Pharmaceutical Sciences, 1974Abstract: A modified UV spectrophotometry procedure for determining diphenylhydantoin in 0.1-0.2 ml of serum is described. Improvement of previously described techniques was accomplished by modifying the extraction conditions and refluxing assembly.
J E, Wallace, H E, Hamilton
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Improved Microdetermination for Diphenylhydantoin in Blood by UV Spectrophotometry
Journal of Pharmaceutical Sciences, 1973A modification of the UV spectrophotometric method proposed by Wallace for the determination of diphenylhydantoin in blood samples is described. Improvement of the Wallace method was made possible by changing various reaction conditions, including oxidation time, and by determining the diphenylhydantoin oxidation product using an appropriately expanded
Y, Saito +3 more
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Detection of Benzoylecgonine in Urine by Means of UV Spectrophotometry
Journal of Analytical Toxicology, 1983A simple and reliable method has been developed for the detection of benzoylecgonine in urine by UV spectrophotometry. Benzoylecgonine was isolated by liquid-liquid extraction and subsequently identified based on its hydrolysis by NaOH. The decrease in absorbance at 235 nm caused by this NaOH hydrolysis was used to identify benzoylecgonine even in the ...
W, Sweeney, L R, Goldbaum, N T, Lappas
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Hydroxyl Radicals quantification by UV spectrophotometry
Electrochimica Acta, 2014Abstract Hydroxilation of aromatic compounds is an oxidative process that has been employed as indirect method to quantify the produced hydroxyl radicals during an advanced oxidation process ( ● OH). This is usually complicated by the radical high reactivity and short life time and therefore a scavenging agent such as salicylic acid is commonly ...
E. Peralta +5 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 ...
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[The determination of Niphensamide by UV spectrophotometry].
Guang pu xue yu guang pu fen xi = Guang pu, 2004In this paper Uv spectrophotometry was used to determine Niphensamide. In this method, 372 +/- 1 nm was selected as a criterion for quantitative determination, and the absorptivity. E1 cm 1% = 556. The results indicated that a better linear-relationship between the absorbance and the concentration of the sample. When the concentration was ranged from 0.
Y, Zhang, Y, Xu, T, Shi
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