Results 281 to 290 of about 444,692 (336)

Unusual Applications of Ultraviolet Spectrophotometry

Applied Spectroscopy, 1952
Ultraviolet spectrophotometry has demonstrated its usefulness in application to problems of identification and qualitative analysis, molecular structure studies, and quantitative analysis, even of multi-component systems. The ability to observe the spectra of ions in solution has been of great usefulness in molecular structure investigations and in the
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Wavelength Anomalies in Ultraviolet-Visible Spectrophotometry

Applied Spectroscopy, 2012
Spectral scans of atomic line emission sources with a Shimadzu UV2101PC spectrophotometer show that the nominal wavelength depends upon the instrumental slit width, the wavelength sampling interval, and for some slit widths, also on the specified spectral range.
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The Determination of β-Cyclodextrin by Ultraviolet Spectrophotometry

Microchemical Journal, 1998
Abstract In the presence of appropriate amounts of β-cyclodextrin, the absorbance(A) of procaine solution at λmax(290nm) increases and the ΔAappears to have a linear relationship toCβ-CDwith regression coefficient (r) 0.9987. This paper proposes ultraviolet spectrophotometry (UVSM) for determining β-CD.
Gu Jun, Pan Jinghao, Zhang Yong
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[Determination of zopiclone in serum by ultraviolet spectrophotometry].

Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases, 2013
目的 建立血清中佐匹克隆定性、定量测定的紫外分光光度法,为临床佐匹克隆中毒提供诊疗依据.方法 取0.5 ml血清加二氯甲烷2.0 ml充分震荡萃取,静置5 min,以4000 r/min离心,取二氯甲烷层于另一试管中氮气吹干,加0.1 mol/L盐酸溶液200μl混匀.取50μl于微量比色池中紫外扫描.结果 血清中佐匹克隆最大吸收峰(304±1) nm,浓度在1.0～30μg/ml范围内呈线性关系,回归方程y=0.0353x+0.0059,相关系数为0.9995,方法回收率为85.8％～102.5％;相对标准偏差(RSD)为:2.9％～4.5％.日内、日间RSD分别为2.73％～5.04％和2.97％～4.74％,最低检出浓度:0.5 μg/ml.结论 该方法操作简便、分析快速,结果准确 ...
Zi-ru Chen, Li-ming Chen, Ming Wu
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Instrumental and chemometric analysis of opiates via gas chromatography–vacuum ultraviolet spectrophotometry (GC-VUV)

Analytical and Bioanalytical Chemistry, 2020
Zackery R. Roberson, Heather C. Gordon, J. Goodpaster   +2 more
semanticscholar   +1 more source

Determination of Phenobarbital and Phenytoin in Serum by Ultraviolet Spectrophotometry

Scandinavian Journal of Clinical & Laboratory Investigation, 1967
A modification of the method of Svensmark & Kristensen for the spectrophotometric determination of phenobarbital and phenytoin in serum has been described. By means of small alterations the method was made more suitable for routine use. It was shown that recovery of both drugs was 7–9 per cent higher when known amounts were added to water instead of ...
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Ultraviolet Absorption Spectrophotometry [PDF]

Analytical Chemistry, 1949
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Ultraviolet Differential Spectrophotometry of Thiobarbiturates

Journal of Medicinal and Pharmaceutical Chemistry, 1960
Bennie Zak, Allen T. Hardy, Jerry Cohen, Louis A. Williams   +3 more
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Determination of Diphenylhydantoin by Ultraviolet Spectrophotometry.

Analytical Chemistry, 1965
John D. Biggs, E. V. Dahl, Jack E. Wallace   +2 more
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Use of ultraviolet–visible spectrophotometry associated with artificial neural networks as an alternative for determining the water quality index

Environmental Monitoring & Assessment, 2018
Edson Marcelino Alves, Ramon Juliano Rodrigues, Caroline dos Santos Corrêa, Tiago Fidemann, J. C. Rocha, J. L. Buzzo, Pedro de Oliva Neto, E. G. F. Núñez   +7 more
semanticscholar   +1 more source