论文部分内容阅读
本文研究了钛（Ⅳ）和对碘偶氮氯膦的显色反应。试验表明：在ｐＨ３．０～４．８的ＨＡｃ－ＮａＡｃ缓冲体系中，钛（Ⅳ）和显色剂形成１：１的蓝绿色配合物。试剂的吸收峰位于５６４ｎｍ，配合物吸收峰在６９６ｎｍ，其表现摩尔吸光系数ε＿（６９６）＝１．６９×１０￣４Ｌ，ｍｏｌ￣（－１）．ｃｍ￣（－１）。钛（Ⅳ）量在０～１４μｇ／１０ｍＬ范围内符合比尔定律。许多常见离子一定量存在不干扰测定。大量Ｆｅ￣（３＋），Ａｌ￣（３＋）的干扰可经沉淀及静态阴离子交换分离和加抗坏血酸消除。测定了铝土矿和水系沉积物中的钛（Ⅳ），结果令人满意。
In this paper, the color reaction of titanium (IV) with iodophosphonazohydrin was studied. The results showed that the titanium (Ⅳ) and the color reagent formed a 1: 1 blue-green complex in the HAc-NaAc buffer system at pH 3.0-4.8. The absorption peak of the reagent is located at 564 nm and the absorption peak of the complex is at 696 nm. The molar absorptivity ε 696 = 1.69 × 10 4 L mol -1. cm ~ (-1). Beer’s law is obeyed in the range of 0 ~ 14μg / 10mL for titanium (Ⅳ). The presence of many common ions in a certain amount does not interfere with the assay. A large number of Fe ~ (3 +), Al ~ (3 +) interference can be separated by precipitation and static anion exchange with ascorbate elimination. The determination of titanium (IV) in bauxite and aqueous sediments gave satisfactory results.