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硫氰酸铁的比色法是早已熟知的课题。业已确认,在水溶液中,铁(Ⅲ)与硫氰酸根生成最大配位数为6的六种络合物。各络合物呈现分级解离的现象,热力学稳定性较小,因而限制了它在分析化学上的应用。1978年,林谦次郎等报道了在非离子表面活性剂TritonX-100存在下的增敏作用,在波长485nm时测定有色络合物的摩尔消光系数为1.88×10~4,但对其机理未作详细讨论。在低介电常数的介质中,提高了络合物的热力学稳定性,改变了其各级络合物摩尔消光系数的分配,是可能的原因之一。但迄今文
The colorimetric method of thiocyanate is a well-known subject. It has been confirmed that in the aqueous solution, iron (III) and thiocyanate generate the maximum coordination number of six complexes. Each complex presents the phenomena of grading and dissociation, and its thermodynamic stability is small, which limits its application in analytical chemistry. In 1978, Lin Qian Jiro reported in the presence of non-ionic surfactant TritonX-100 in the presence of sensitization, measured at a wavelength of 485nm colored complex molar extinction coefficient of 1.88 × 10 ~ 4, but its mechanism is not For a detailed discussion. In the low dielectric constant medium, the thermodynamic stability of the complex is improved and the molar extinction coefficient distribution of the complexes at all levels is changed, which is one of the possible reasons. But so far