A serial determination of isobutanol in dilute aqueous solutions

2010 ◽  
Vol 73 (5) ◽  
pp. 382-384
Author(s):  
P. M. Heertjes ◽  
P. C. Steyne ◽  
H. Talsma
Keyword(s):  
Aqueous Solutions ◽  
Serial Determination ◽  
Dilute Aqueous Solutions

A High Sensitivity Digital Raman Difference Spectrometer for Studies on Solutions of Biological Molecules with On-Line Computer Control of Data Acquisition and Reduction

1976 ◽  
Vol 30 (2) ◽  
pp. 168-179 ◽  
Author(s):  
Ray W. Chrisman ◽  
Jim C. English ◽  
R. Stuart Tobias
Keyword(s):  
Aqueous Solutions ◽  
Computer Control ◽  
Visible Spectrum ◽  
High Sensitivity ◽  
Biological Molecules ◽  
Difference Spectra ◽  
On Line ◽  
Dilute Aqueous Solutions ◽  
Good Signal

The design and construction of a computer-controlled Raman spectrophotometer for the determination of difference spectra among up to four samples is described. The advantages of control by a minicomputer compared to a microcomputer or a hard wired controller are discussed. Conditions for the attainment of good signal/noise ratios with aqueous solutions of nucleotides in the 1 to 25 m M range are examined for the case of excitation in the visible spectrum to minimize radiation damage. Applications to studies of dilute aqueous solutions of biological molecules are discussed. The interactions of small molecules with bio-polymers, particularly, are examined.

Cadmium Removal by Flotation from Diluted Aqueous Solutions. Determination of the Optimum Separation Conditions

2009 ◽  
Vol 59 (12) ◽  
Author(s):  
Adrian Turtureanu
Keyword(s):  
Aqueous Solutions ◽  
Molar Ratio ◽  
Optimal Conditions ◽  
Air Flow Rate ◽  
Cadmium Removal ◽  
Initial Concentration ◽  
Dilute Aqueous Solutions ◽  
Very High ◽  
Optimum Separation

The paper presents the removal of cadmium by flotation from dilute aqueous solutions, at a laboratory scale, using an anionic collector (oleic acid). The optimum values of the main parameters influencing this process were determined: pH of Cd(II) solutions, molar ratio collector:Cd(II), air flow rate, flotation time and initial concentration of Cd(II). Using these optimal conditions, a very high removal degree of cadmium (over 99%) was obtained.

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