申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP0482528A1
公开(公告)日:1992-04-29
A dry analysis element for the analysis of iron ions, which is improved in selectivity so that iron ions can be analyzed reliably at a high sensitivity without the interferences by the presence of hindering Cu²⁺ and/or Zn²⁺ ions.
The analysis element comprises a detection reagent layer containing Nitro-PAPS acting as a chelating agent and a cationic compound, and a pre-treating layer containing a Cu²⁺-specific chelating agent. The analysis element further includes a pH buffer for keeping the pH value of the detection reagent layer within the range of from pH 3.0 to 5.0. The pH adjusting buffer may be contained in either one of the detection reagent layer or the pre-treating layer, or may be contained in another layer. The detction reagent layer may be composed of a coloring reagent layer containing Nitro-PAPS acting as the chelating agent, and a diffusion-preventing layer laminated on the coloring reagent layer and containing the cationic compound.
一种用于分析铁离子的干式分析元件,它的选择性得到了改善,从而能够以高灵敏度可靠地分析铁离子,而不会受到 Cu²⁺ 和/或 Zn²⁺ 离子的干扰。
分析元件由检测试剂层和预处理层组成,前者含有作为螯合剂的 Nitro-PAPS 和阳离子化合物,后者含有 Cu²⁺ 特异性螯合剂。分析元件还包括 pH 缓冲剂,用于将检测试剂层的 pH 值保持在 pH 3.0 至 5.0 的范围内。pH 值调节缓冲剂可以包含在检测试剂层或预处理层中的任何一层中,也可以包含在另一层中。检测试剂层可由含有硝基-PAPS 作为螯合剂的着色试剂层和层叠在着色试剂层上并含有阳离子化合物的防扩散层组成。