火焰原子吸收光谱法测高纯硝酸钾中微量钠

发布时间：2018-05-27 09:35

本文选题：标准加入法 + 高纯硝酸钾　；参考：《无机盐工业》2017年09期

【摘要】：随着中国高端玻璃产业的发展和兴起,光学玻璃市场对硝酸钾中钠含量的要求越来越高,光学玻璃用硝酸钾中钠质量分数可低至10μg/g,对于如此低含量的钠,对测样条件的要求较高。使用原子吸收光谱法对标准加入法测光学玻璃用硝酸钾中钠(约10μg/g)的最佳测样条件进行了探索,考察了硝酸加入量、样品稀释倍数对测量结果准确性的影响,并对该方法的稳定性进行了考察。选用标准加入法,在加标量为零时钠质量浓度约为0.1μg/mL,标准物质系列各点钠质量浓度分别为0.0、0.1、0.2、0.3μg/mL,硝酸(1+1)加入量为2%(体积比)条件下,测量结果的精确度和稳定性均较好。该方法相对标准偏差为0.783 8%,测量相对误差为2.53%~4.94%,适用于钠质量分数约为10μg/g的硝酸钾检测。
[Abstract]:With the development and rise of high-end glass industry in China, the demand for sodium content in potassium nitrate in optical glass market is higher and higher. The mass fraction of sodium in potassium nitrate in optical glass can be as low as 10 渭 g / g. The requirements for the test conditions are high. The optimum conditions for the determination of sodium (about 10 渭 g / g) in potassium nitrate for optical glass by standard addition method were studied by atomic absorption spectrometry. The effects of the addition of nitric acid and the dilution times of the sample on the accuracy of the measurement results were investigated. The stability of the method is also investigated. With the standard addition method, the accuracy and stability of the measurement results are good under the condition that the standard addition is about 0.1 渭 g 路mL ~ (-1) of sodium at 00:00, the mass concentration of sodium at each point of the standard material series is 0.00.1g / mL, and the concentration of nitrate is 11) at the dosage of 2g / mL (volume ratio). The relative standard deviation of this method is 0.783 and the relative error is 2.53 and 4.94, which is suitable for the determination of potassium nitrate with sodium content of about 10 渭 g / g.
【作者单位】：四川大学化学工程学院;
【基金】：四川大学科技计划项目磷化工关键技术与产业化资助项目(SCU2015C002)
【分类号】：O657.31;TQ131.13

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