Ultrasonic velocity measurements for butyl acetate+hydrocarbon mixtures

Resa, José M.; González, Cristina; Concha, R.G.; Iglesias, M.

doi:10.1080/00319100410001724548

Cited by 25 publications

(11 citation statements)

References 9 publications

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“…Kiyohara and Benson [14] suggested that, Dj s is the resultant of several opposing effects. The positive values may be attributed to the size of these molecules that allow relative molecular interactions between acetate molecules [15].…”

Section: Resultsmentioning

confidence: 99%

“…The purity of the solvents, after purification, was ascertained by comparing their densities, viscosities, and speed of sound with the corresponding literature values at (298. 15 and 308.15) K (table 1). Binary mixtures were prepared by mass in air tight stoppered glass bottles.…”

Section: Methodsmentioning

confidence: 94%

“…We now report the density, viscosity, and speed of sound data for the binary mixtures of TBA with benzene, methylbenzene, and ethylbenzene at (298. 15 and 308.15) K.…”

Section: Introductionmentioning

confidence: 96%

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Densities, viscosities, speed of sound, and IR spectroscopic studies of binary mixtures of tert-butyl acetate with benzene, methylbenzene, and ethylbenzene at T=(298.15 and 308.15)K

Hasan¹,

Sawant²,

Sawant³

et al. 2011

The Journal of Chemical Thermodynamics

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 94%

See 1 more Smart Citation

Densities, viscosities, speed of sound, and IR spectroscopic studies of binary mixtures of tert-butyl acetate with benzene, methylbenzene, and ethylbenzene at T=(298.15 and 308.15)K

Hasan¹,

Sawant²,

Sawant³

et al. 2011

The Journal of Chemical Thermodynamics

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“…In addition, the decrease in compressibility with an increase in the concentration may be due to the filling of interstitial spaces of water molecules by IBP molecules shaping a tight or compact structure. This decrease in is by the cause of the partial breaking of the water structure [25]. The values of are found to be negative.…”

Section: Sound Velocitymentioning

confidence: 86%

“…3. Over the total molecular environment to gather more information, several acoustic parameters ( , ,, W, Z, R) hasbeen calculated from experimentally determined density and sound data [25]. It is noticed that , the isentropic compressibility decreased with an increase in concentration of drug in water.…”

Section: Sound Velocitymentioning

confidence: 99%

An environmental remediation: study of molecular interactions of the poorly soluble pharmaceutical drug ibuprofen in aqueous media

2020

Biointerface Res Appl Chem

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Medication disposal today is an alarming issue and gaining much more awareness from the consumers as well as healthcare professionals. Various molecular interactions surviving in aqueous drug systems may be considered responsible for these health hazards. This paper reports an experimental study of the various physico-chemical properties of poorly water soluble drug, ibuprofen in aqueous system. Conductance of ibuprofen been measured in aqueous medium at different concentrations and temperatures (from 298.15 K to 313.15 K), and the sound velocity and surface tension study are done only at 298.15 K. The experimental data have been analyzed to interpret different derived parameters as well some thermo-acoustical parameters. The surface tensionvalues have also been determined by means of Stalagmometer and the obtained values are compared with the values computed from sound velocity and density values. Insights obtained from the present study about different molecular interactions of ibuprofen can assist public health and waste management authorities to improve pharmaceutical resource handling and management in rural and urban areas. Determination of solubility.As IBP is very less soluble in water, for its solubility measurement an excess quantity of IBP in 100 mL of conductivity water was taken and heated for 30 minutes maintained at 50°C.

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Ultrasonic characterization of aqueous solutions with varying sugar and ethanol content using multivariate regression methods

Krause

Schöck

Hussein

et al. 2011

Journal of Chemometrics

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a This paper presents a multivariate regression method for simultaneous detection of sugar (sucrose as a sugar equivalent) and ethanol concentrations in aqueous solutions via temperature-dependent ultrasonic velocity. Thus, several samples of different combined concentration values were exposed to a temperature spectrum ranging from 2 to 30-C to investigate the temperature dependence of ultrasonic velocity. Model calibration was performed in order to predict the concentrations of interest. With results of proceeded experiments, the equations for calculation of unknown concentrations were carried out using polynomial regression revealing two equations with functional dependence of concentrations on each other. Further, side effects or systematic errors are still included in this model. To avoid such problems as well as to increase the accuracy with respect to the absolute errors in determining unknown probes, multivariate regression methods such as partial least squares (PLS) were tested and compared to the results obtained by polynomial regression. The accuracy achieved with chemometric models on average was three times higher. In direct comparison, the values of the error for the prediction of sucrose concentration were on average around 0.4 g/100 g in the regression model with polynomial background (RMPA) and around 0.12 g/100 g in the PLS model, and for ethanol concentration 0.13 and 0.04 g/100 g, respectively. Furthermore, calculations of the concentrations are possible without knowing the concentrations of the other solute.

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Ultrasonic velocity measurements for butyl acetate+hydrocarbon mixtures

Cited by 25 publications

References 9 publications

Densities, viscosities, speed of sound, and IR spectroscopic studies of binary mixtures of tert-butyl acetate with benzene, methylbenzene, and ethylbenzene at T=(298.15 and 308.15)K

Densities, viscosities, speed of sound, and IR spectroscopic studies of binary mixtures of tert-butyl acetate with benzene, methylbenzene, and ethylbenzene at T=(298.15 and 308.15)K

An environmental remediation: study of molecular interactions of the poorly soluble pharmaceutical drug ibuprofen in aqueous media

Ultrasonic characterization of aqueous solutions with varying sugar and ethanol content using multivariate regression methods

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