Spectrophotometric determination of indiumin zinc effluent

Abstract

A new extraction-spectrophotometric method for the determination of indium at ppb level in zinc effluent is described. It is based on quantitative extraction (51.2-99.2%) of the tetrabromoindate complex with toluene solution of N,N'-diphenylbenzamidine and its nine analogous from sulphuric acid solutions, which allowed the extract to react with basic dye (i.e. brilliant green, malachite green, crystal violet) solution in sequence. Among the basic dyes tested, brilliant green gave the most sensitive colour reaction. The value of molar absorptivity of the amidine bromoindate extracts with brilliant green lie in the range of (0.53-1.03)×10(5) l mole(-1) cm(-1) at absorption maximum, 630-640. With the most sensitive compound, N-(2-methyl-phenyl)-N-phenylbenzamidine(APPBA), the detection limit of the method is 13 ppb. The method is free from interferences of almost all ions associated with indium. The method has been applied for the determination of indium to zinc-effluent.

Determination of Phthalate Acid Esters in Water and Sediment Samples by GC–MS

“…As to the analytical methods, many previous studies claimed that gas chromatography-mass spectrometry (GC-MS) may be the more sensitive technique when qualifying and quantifying PAEs [7]. However, prior sample concentration is certainly needed to successfully analyze the multitude of different chemicals present at very low concentrations.…”

A solid phase extraction procedure for Indium prior to its graphite furnace atomic absorption spectrometric determination

“…Coprecipitation [7,13,14], solvent extraction [15][16][17][18] and electroanalytical techniques [19,20] have been used for the enrichment and separation of indium ions from various matrices including natural waters and metallic zinc, etc.…”