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真空蒸馏预富集电感耦合等离子体发射光谱法测定铂
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【西医药学毕业论文】作者:朱茜 邓飞跃 彭穗 杨春玉 丘克强【摘要】 建立了真空蒸馏预富集电感耦合等离子体发射光谱法测定铅试样中微量铂的方法。在真空条件下,利用Pb和Pt在较高温度下蒸汽压的差别进行分离,富集后的铂溶解制成溶液后进行电感耦合等离子体发射光谱检测,实现了真空密闭回收铅。针对试样的特点,对真空蒸馏方法理论上的可行性进行研究。结果表明:在蒸馏温度为1250 K,真空度为30 Pa,蒸馏时间为3 h条件下,铂的富集分离效果最好,可富集至99.01%以上。线性范围为0.023~20 mg/L,检出限(3σ)为0.0069 mg/L,对样品测定的相对标准偏差为1.7%(n=6)。用本方法对样品中加入的铂标准溶液进行了测定,回收率为99.8%~103.0%。本方法简便快速、无污染,已应用于废电路板贵金属冶余物料中铂的测定。 【关键词】 真空蒸馏预富集; 电感耦合等离子体发射光谱; 铂; 铅 Abstract A method was established for the determination of platinum in lead samples by ICPAES after separated and enriched by vacuum distillation. Under the condition of vacuum, platinum and lead can be separated at high temperature because of their different vapor pressures. The enriched platinum was determined by ICPOES after dissovled, and also lead was recovered in vacuum. Theoretical feasibility of the vacuum distillation method and the influence factors such
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