3/23/2023 0 Comments Baku rfactor downloadThe accuracy of the developed preconcentration method in conjunction with the Arsenazo III procedure was tested by analysing MESS-3, a marine sediment certified reference material. The detection limit corresponding to three times the standard deviation of the blank was found to be 5mugl(-1). Five replicate determinations of 25mug of uranium(VI) present in 1l solution gave a mean absorbance of 0.032 with a relative standard deviation of 2.52%. Calibration graphs were rectilinear over the uranium(VI) concentrations in the range 5-200mugl(-1). In this, a column mode preconcentration of uranium(VI) was carried out in the pH range 4.0-5.0, eluted with 1.0moll(-1) HCl and determined by an Arsenazo III spectrophotometric procedure. The latter has been used for solid phase extractive preconcentration and separation of trace amounts of uranium(VI) from other inorganics. It was revealed that at the concentration of compounds 4c and 4d, 100 mg ×L −1, the antibacterial activity was 100%.ĭiarylazobisphenol (DAB) 1 and diarylazobisphenol modified carbon 2 were synthesized and characterised. The biological activity was examined against sulphate-reducing bacteria (SRB). The results showed that the synthesized compounds at the concentrations 125, 150 mg ×L −1 have corrosion inhibition activity of 78%-95% by gravimetric measurements and 81%-92% by potentiodynamic measurements at 100, 150 mg ×L −1. The steel surface was checked by SEM, and the steel surface showed good surface coverage. For this purpose, a series of techniques such as gravimetric measurement, potentiodynamic polarisation, and scanning electron microscope (SEM) were used and some thermodynamic parameters of corrosion process (∆G ads. The corrosion inhibition of the synthesized halides on carbon steel in water-salt-hydrocarbon environment, saturated with H 2 S, was investigated. A series of 1-(4-(2-allylphenoxy)butyl)piperidin-1-ium halides (4a-d) was synthesized and characterized via spectroscopic methods (FTIR, 1 H NMR).
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