石墨炉原子吸收法测定Al_2O_3助燃剂中的微量铂

• 作 者: 胡庆兰 侯婷瑶
• 机 构: 中科院长春应用化学研究所,长春冶金地质专科学校,
• 出 处: 理化检验.化学分册
• 发表日期: 1989年06期
• 关键词: Al_2O_3 原子吸收法测定 石墨炉 助燃剂 共沉淀 测量灵敏度 基体效应 铂标准溶液 基体干扰 仪器工作条件

近年来出现了Al_2O_3助燃剂,它在研制、生产和使用过程中,需要对微量的铂含量进行测定。使用原子吸收法测定Al_2O_3中的微量铂,常常受到基体的干扰。我们利用铂可以被碲共沉淀的特性,用王水进行样品的前处理,然后用石墨炉原子吸收分光光度计进行测定的方法,降低了基体效应,在一定范围内,测量值不受取样量的限制,因此提高了测量灵敏度和准确性。

In recent years there have been Al 2 O 3 combustion improvers, which in the development, production and use of the process, the need for trace platinum content determination. Determination of trace amounts of platinum in Al 2 O 3 using atomic absorption spectroscopy is often disturbed by the matrix. We use platinum can tellurium coprecipitation characteristics, with aqua regia sample pretreatment, and then graphite furnace atomic absorption spectrophotometer method of determination, reducing the matrix effect, in a certain range, the measured value is not the amount of sample Of the limit, thus improving the measurement sensitivity and accuracy.