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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.

基于邻苯二甲酸二辛酯（DOP）增塑的聚氯乙烯（PVC）膜表面的离子对吸附作用，建立了一种高灵敏、简便的测定痕量金属离子的新方法。用2，2 ′-二羟基偶氮苯（DHAB或H@> D_（22）@> D_（2L））和结晶紫（CV^+）测定ppb级的铝（Ⅲ）和铁（Ⅲ）离子。除了阳离子染料CV^+的大摩尔吸光系数外，蓝紫色离子对CV^+[M^<III>L_2]^-在透明膜上的富集使测定变得简单而灵敏。在铝的情况下，三原色组合系统，黄色试剂（H_2L），红色络合物（[AlL_2]^-）和蓝紫色抗衡阳离子（CV^+），给出了四个浓度范围（ppb- ppm）的铝的明确指示。用试剂、H_2L和铝的相对浓度很好地解释了这种微妙的颜色变化（土黄色-红棕色-蓝紫色-无色）。而在铁的情况下，由黄色（H_2L和[FeL_2]^-）和蓝紫色（CV^+）组成的互补色系统产生了不同的显色系统（黄色-橄榄绿色-蓝紫色）。该体系已成功地应用于水样中铝和人血清中铁的测定。不需要分离血清蛋白的准备程序，因为该方法基本上不受样品溶液中大分子和颗粒物质的干扰。此外，在HPLC分析前将该方法应用于预浓缩步骤，能够测定ppt水平的铝。