应用水解还原铁(Ⅲ)-邻二氮菲光度法测定丙酮肟

• 作 者: 成凤桂 欧知义 雷海
• 机 构: 中南民族学院化学系,中南民族学院化学系,江西火电公司 武汉 430074,武汉 430074
• 出 处: 分析化学
• 发表日期: 1999年05期
• 关键词: 丙酮肟 水解 还原 分光光度

丙酮肟在酸性条件下经加热水解生成具有还原性的羟胺,并将Fe(Ⅲ)定量还原为Fe(Ⅱ),应用Fe(Ⅱ)-邻二氮菲光度法简接测定丙酮肟。选择了水解最佳条件(加热温度、时间、介质酸度、显色剂的加入顺序等),结果表明,测定线性范围为0～1.2mg/L,相关系数r=0.9998,最低检测浓度为0.046 mg/L,RSD<3.3％(n=5)。应用该法测定火力发电厂锅炉运行水中丙酮肟的含量,方法简便,灵敏度高。

Acetoneoxime hydrolyzed under acidic conditions to produce hydroxylamine with reducing ability, and Fe (Ⅲ) was reduced to Fe (Ⅱ). Fe (Ⅱ) - phenanthroline photometric method was used to determine acetone oxime. The results showed that the linear range was 0 ~ 1.2mg / L, the correlation coefficient was 0.9998, the lowest detection concentration was 0.046 mg, the best hydrolysis condition was selected (heating temperature, time, medium acidity, /L, RSD <3.3% (n = 5). This method is used to determine the content of acetone oxime in boiler operating water of thermal power plant. The method is simple and has high sensitivity.