104355-11-5Relevant academic research and scientific papers
Extraction-spectrophotometric determination of rhenium(VII) with thiocyanate and amidines in the presence of cetyltrimethylammonium bromide
Deb, Manas Kanti,Shrivastava, Mona
, p. 388 - 389 (2007/10/03)
A simple and selective spectrophotometric method has been developed for the determination of rhenium(VII) in the ore sample based on the reaction of ReVII with thiocyanate in the presence of tin(II) chloride in sulfuric acid media and subsequent extraction of the complex with chloroform solution of N,N′-diphenylbenzamidine (DPBA) and its nine derivatives in the presence of a cationic surfactant, cetyltrimethylammonium bromide (CTAB). The effects of acids and organic solvents on the extraction of the metal and colour intensity of the complex are discussed. The tolerance limits of diverse ions are very high. MoVI interferes it but is removed by prior precipitation by oxine effectively. The molar absorptivity and detection limit of the method with DPBA are (3.65 ± 0.02) × 104 dm -3 mol-1 cm-1 and 0.004 μg ml-1, respectively. The relative standard deviation of the method at a level of 25 μg ReVII / 10 ml is ± 1.2%.
