Development of transparent film having functions of separation and sensing

开发具有分离和传感功能的透明薄膜

基本信息

批准号：
61470063
负责人：
YOTSUYANAGI Takao
金额：
$ 3.58万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

项目摘要

A new, highly sensitive and simple method for trace metal ions has been developed, based on the ion-pair adsorption on the surface of polyvinylchloride (PVC) film plasticized with dioctylphthalate (DOP), which serves as a water immiscible second phase. Aluminum(III) and iron(III) ions were determined at ppb level by the use of 2,2'-dihydroxyazobenzene (DHAB or H@>D22@>D2L) and crystal violet (CV^+). In addition to the large molar absorptivity of the cationic dye, CV^+, the enrichment of the blue violet ion-pair species, CV^+[M^<III>L_2]^-, onto the trancs-parent film has enabled the simple but highly sensitive determination. In the case of aluminum, the three primary colors combination system, yellow reagent (H_2L), red complex ([AlL_2]^-), and blue violet counter cation (CV^+), gave clear indication for four concentration ranges (ppb-- ppm) of aluminum. The delicate color changes (khaki-- reddish brown-- blue violet-- colorless) are well explained by the relative concentration of the reagent, H_2L, and aluminum. While, in the case of iron, the complementary color system consisting of yellow (H_2L and [FeL_2]^-) and blue violet (CV^+) brought about a different coloration system (yellow-- olive green-- blue violet). This system has been successively applied to the determination of aluminum in water samples and iron in human serum. No preparatory procedures for the separation of serum protein are required, since this method is essentially free from interferences from macromolecules and particulate matters in sample solutions. Further, the application of this method for the preconcentration step prior to HPLC analysis enabled the determination of aluminum at ppt level.

基于用二钟苯二甲酸酯（DOP）塑料的聚氯乙烯（PVC）表面上的离子对吸附，已开发了一种新的，高度敏感的和简单的方法，用于痕量金属离子，该方法可作为二钟苯二甲酸酯（DOP），该薄膜可作为水含水剂的第二阶段。铝（III）和铁（III）离子在PPB水平上通过使用2,2'-二羟基苯二苯（Dhab或H@> d22@> d22@> D2L）和Crystal Violet（CV^+）确定。除了阳离子染料的巨大摩尔吸收性外，蓝色紫色离子对物种的富集cv^+[m^<iii> l_2]^ - 在trancs-partent膜上还可以实现简单但高度敏感的测定。在铝的情况下，三种原色组合系统，黄色试剂（H_2L），红色复合物（[all_2]^ - ）和蓝色紫罗兰色反阳离子（CV^+），给出了四个浓度范围（PPB-- PPM）的明确指示。微妙的颜色变化（卡其色 - 红棕色 - 蓝色 - 无色），通过试剂，H_2L和铝的相对浓度很好地解释了。而对于铁的情况，互补的颜色系统由黄色（H_2L和[FEL_2]^ - ）和蓝色紫罗兰色（CV^+）组成，带来了不同的颜色系统（黄色 - 橄榄绿色 - 蓝色 - 蓝色紫罗兰色）。该系统已连续应用于水样中的铝和人血清中的铁。不需要将血清蛋白分离的准备程序，因为该方法基本上没有来自大分子的干扰和样品溶液中的颗粒物。此外，在HPLC分析之前，该方法在预浓缩步骤中的应用实现了PPT级别的铝的确定。