有機溶媒-水混合溶液中におけるクロムアズロールSによる銅の吸光光度定量

概要

論文の詳細を見る
The effect of polar organic solvents such as methanol, ethanol, 1-propanol, 2-propanol and dioxane on the spectrophotometric determination of copper with Chromazurol S (GAS) were investigated. Excess GAS with copper in the mixtures of the solvent and water form predominantly the 1 : 2 complexes with the absorption maxima at (590〜610) nm. The bathochromic shifts are observed in the absorption spectra of the complexes by adding the solvents. The molar absorptivities increase from 2.2×10^4 observed in the aqueous solution to (3.8〜6.3)×1O^4 in the mixtures of the 80 v/v solvent and water. The molar absorptivities tend to increase with the decrease in the values of the dielectric constants of the solvents. The relationship between the absorbances and the concentrations of copper {(0.5〜2.6)×10^<-5>M} is almost linear in the 80 v/v solvent-water systems containing 3.4×10^<-4>M CAS and 0.01 M hexamine.
社団法人日本分析化学会の論文
1976-01-10