IR spectroscopy determination of the complexation constant for a cholesterol–diisopropyl sulfoxide complex

2013 ◽  
Vol 80 (1) ◽  
pp. 135-137 ◽  
Author(s):  
L. S. Gabrielyan ◽  
L. G. Melik-Ohanjanyan ◽  
S. A. Markarian
2015 ◽  
Vol 9 (4) ◽  
pp. 411-416 ◽  
Author(s):  
Ostap Ivashkiv ◽  
◽  
Piotr Bruzdziak ◽  
Olena Shyshchak ◽  
Jacek Namiesnik ◽  
...  

2020 ◽  
Vol 16 (4) ◽  
pp. 456-464
Author(s):  
Danilo F. Rodrigues ◽  
Hérida R.N. Salgado

Background: A simple, eco-friendly and low-cost Infrared (IR) method was developed and validated for the analysis of Cefepime Hydrochloride (CEF) in injectable formulation. Different from some other methods, which employ organic solvents in the analyses, this technique does not use these types of solvents, removing large impacts on the environment and risks to operators. Objective: This study aimed at developing and validating a green analytical method using IR spectroscopy for the determination of CEF in pharmaceutical preparations. Methods: The method was validated according to ICH guidelines and the quantification of CEF was performed in the spectral region absorbed at 1815-1745 cm-1 (stretching of the carbonyl group of β- lactam ring). Results: The validated method showed to be linear (r = 0.9999) in the range of 0.2 to 0.6 mg/pellet of potassium bromide, as well as for the parameters of selectivity, precision, accuracy, robustness and Limits of Detection (LOD) and Quantification (LOQ), being able to quantify the CEF in pharmaceutical preparations. The CEF content obtained by the IR method was 103.86%. Conclusion: Thus, the method developed may be an alternative in the quality control of CEF sample in lyophilized powder for injectable solution, as it presented important characteristics in the determination of the pharmaceutical products, with low analysis time and a decrease in the generation of toxic wastes to the environment.


Author(s):  
Yew Keong Choong ◽  
Su-Qin Sun ◽  
Qun Zhou ◽  
Zakiah Ismail ◽  
Badrul Amini Abdul Rashid ◽  
...  

2010 ◽  
Vol 24 (7-8) ◽  
pp. 444-447 ◽  
Author(s):  
María Dolores Ruiz ◽  
Isneri Talavera Bustamante ◽  
Angel Dago ◽  
Noslen Hernández ◽  
Ana C. Núñez ◽  
...  

1979 ◽  
Vol 30 (5) ◽  
pp. 686-688
Author(s):  
D. Saidov ◽  
Kh. Khabibulloev ◽  
R. M. Marupov ◽  
V. I. Dasturi ◽  
M. S. Umarova

1982 ◽  
Vol 36 (2) ◽  
pp. 155-157 ◽  
Author(s):  
D. B. Chase ◽  
R. L. Amey ◽  
W. G. Holtje

Diffuse reflectance FT-IR spectroscopy is used to obtain infrared spectra of paints directly on paper panels. The binder contribution to the spectrum can be effectively eliminated by spectral subtraction and the spectra of photodecomposition products are obtained. Comparison with reference spectra allows the determination of the photodecomposition mechanism.


2019 ◽  
Vol 74 (1) ◽  
pp. 85-90
Author(s):  
Marius Schöttle ◽  
Dominik Schuchardt ◽  
Andreas Edenharter ◽  
Sebastian Koch ◽  
Jürgen Senker ◽  
...  

AbstractApplying a nematic liquid crystalline phase of a synthetic Na-hectorite with layer separations >100 nm, the reaction time for pillaring with Al13 Keggin oligocation could be reduced to seconds ensuring that cation exchange is controlled by thermodynamics. With this material at hand we are able to resolve the long-standing dispute regarding the charge of intercalated Keggin oligocations. Micropore sizes as determined by physisorption isotherms, adsorption isotherms obtained via elemental analysis, and results of 27Al solid-state NMR and pyridine probe IR spectroscopy favor a charge of +7 for the Al13 pillars intercalated into hectorite unaltered.


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