The Experts below are selected from a list of 7443 Experts worldwide ranked by ideXlab platform
Zhou Neng-qin - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of Uncertainty of Determination TN in Water by Ultraviolet Spectrophotometry
Environmental Monitoring in China, 2006Co-Authors: Zhou Neng-qinAbstract:Using the basical method and program about evaluation of uncertainty,analyze every kind effects of evaluation of uncertainty of determination TN in water by Ultraviolet Spectrophotometry,establish mathematical model,calculate synthetically uncertainty of TN.
Zhao Yan - One of the best experts on this subject based on the ideXlab platform.
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Determination of total flavonoid in Veronica linariifolia by Ultraviolet Spectrophotometry
Journal of Shanxi Medical University, 2007Co-Authors: Zhao YanAbstract:Objective To establish a method for determining the content of total flavonoid in Veronica linariifolia.Methods Ultraviolet Spectrophotometry method was used with rutin as reference substance and the wavelength was 410 nm.Results Linear range of rutin was 3.1-24.8 μg/ml,A=34.9×10-3 c-0.000 5,r=0.999 9,and RSD of precision was 0.3%.Mean recovery was 98.0%-102.0%.Conclusion The method is accurate and credible,and it can be used to control the quality of Veronica linariifolia.
Mustafa A Abuirjeie - One of the best experts on this subject based on the ideXlab platform.
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simultaneous determination of theophylline and guaiphenesin by third derivative Ultraviolet Spectrophotometry and high performance liquid chromatography
Analyst, 1992Co-Authors: Mohamed H Abdelhay, Mohie Sharaf Eidin, Mustafa A AbuirjeieAbstract:Two methods are described for the simultaneous determination of theophylline and guaiphenesin in combined pharmaceutical dosage forms. The first method depends on third-derivative Ultraviolet Spectrophotometry, with the zero crossing technique of measurement. Third-derivative amplitudes at 222 and 278 nm were selected for the assay of guaiphenesin and theophylline, respectively. The second method is based on high-performance liquid chromatography on a reversed-phase column using a mobile phase of 0.01 mol dm–3 sodium dihydrogen phosphate–methanol–acetonitrile (8 + 2 + 1)(pH 5.5) with detection at 245 nm. Both methods showed good linearity, precision and reproducibility. The proposed methods were successfully applied to the determination of these drugs in laboratory-prepared mixtures and in capsules or elixir.
Bai Xiao-hong - One of the best experts on this subject based on the ideXlab platform.
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Determination of amoxicillin in amoxicillin sodium and clavulanate potassium in compound injection by Ultraviolet Spectrophotometry
Journal of Shanxi Medical University, 2005Co-Authors: Bai Xiao-hongAbstract:Objective and Methods To establish Ultraviolet Spectrophotometry for measuring the amount of amoxicillin sodium and clavulanate potassium in injection. Results Amoxicillin showed a better linear relation with absorbance when it was varied in 98～279 mg/ml. A=2.567 44C+0.046 58(r=0.9974,n=5). The average proportion of recycling was 99.2%, and RSD was 2.5%(n=5). Conclusion As a precise, simple and speedy method, it can be applied to the determination of amoxicillin sodium and clavulanate potassium in compound injection.
Mohamed H Abdelhay - One of the best experts on this subject based on the ideXlab platform.
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simultaneous determination of theophylline and guaiphenesin by third derivative Ultraviolet Spectrophotometry and high performance liquid chromatography
Analyst, 1992Co-Authors: Mohamed H Abdelhay, Mohie Sharaf Eidin, Mustafa A AbuirjeieAbstract:Two methods are described for the simultaneous determination of theophylline and guaiphenesin in combined pharmaceutical dosage forms. The first method depends on third-derivative Ultraviolet Spectrophotometry, with the zero crossing technique of measurement. Third-derivative amplitudes at 222 and 278 nm were selected for the assay of guaiphenesin and theophylline, respectively. The second method is based on high-performance liquid chromatography on a reversed-phase column using a mobile phase of 0.01 mol dm–3 sodium dihydrogen phosphate–methanol–acetonitrile (8 + 2 + 1)(pH 5.5) with detection at 245 nm. Both methods showed good linearity, precision and reproducibility. The proposed methods were successfully applied to the determination of these drugs in laboratory-prepared mixtures and in capsules or elixir.