连续光源火焰原子吸收光谱法测定氧化镍中钴铜锌铁钙镁

发布时间：2018-06-17 10:45

本文选题：连续光源原子吸收光谱法(CS-AAS) + 氧化镍　；参考：《冶金分析》2017年03期

【摘要】：采用盐酸溶解样品,选择Co 240.72nm、Cu 324.75nm、Zn 213.86nm、Fe 248.33nm、Ca 422.67nm、Mg 202.58nm作为分析谱线,钴、铜、锌、铁选择3个像素点,钙、镁选择9个像素点,建立了连续光源原子吸收光谱法(CS-AAS)同时测定氧化镍中的钴、铜、锌、铁、钙、镁的方法。实验表明:在100mL测定液中加入2mL 200g/L氯化锶溶液,可消除测定介质(体积分数为2%的盐酸)对待测元素的影响;基体镍对测定的干扰可忽略。在优化的实验条件下,钴、铜、锌、铁、钙、镁的校准曲线相关系数均不低于0.999 0,且其方法检出限在0.002~0.092μg/mL之间。按照实验方法对氧化镍样品中钴、铜、锌、铁、钙、镁分别平行测定11次,钙和镁的测定值在0.1%~0.4%之间,其对应的相对标准偏差(RSD)不大于2%;钴、铜、锌、铁的测定值在0.003%~0.04%之间,其对应的相对标准偏差均小于10%。将实验方法应用于电真空镍光谱标准样品(该标样为氧化镍状态)中上述各元素的测定,结果与认定值基本一致。
[Abstract]:Using HCl dissolved sample, Co 240.72nmHU Cu 324.75nmmHN Zn 213.86nmmHe Fe 248.33nmmC422.67nm 202.58nm as the analytical line, cobalt, copper, zinc and iron selected 3 pixel points, calcium and magnesium selected 9 pixel points. A continuous light source atomic absorption spectrometry (CS-AASs) was established for the simultaneous determination of cobalt in nickel oxide. Methods of copper, zinc, iron, calcium and magnesium. The experimental results show that adding 2 mL 200 g / L strontium chloride solution into 100 mL determination solution can eliminate the influence of determination medium (2% HCl by volume fraction) on the determination of elements, and the interference of matrix nickel to the determination can be neglected. Under the optimized experimental conditions, the calibration curves of cobalt, copper, zinc, iron, calcium and magnesium have a correlation coefficient of not less than 0.999, and the detection limit of the method is between 0.002 渭 g / mL and 0.092 渭 g / mL. According to the experimental method, cobalt, copper, zinc, iron, calcium and magnesium in nickel oxide samples were determined 11 times in parallel. The determination values of calcium and magnesium were between 0.1% and 0.4%, and the relative standard deviation (RSDs) was not more than 2. The determination values of cobalt, copper, zinc and iron were between 0.003 and 0.04%. The relative standard deviations are less than 10. The experimental method has been applied to the determination of the above elements in the standard sample of electro vacuum nickel (the standard sample is nickel oxide state). The results are in good agreement with the determined values.
【作者单位】：国家镍钴新材料工程技术研究中心;兰州金川新材料科技股份有限公司;
【分类号】：TQ138.13;O657.31

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