火焰原子吸收光谱法测定粗锌中的铜  

Determination of Copper in Crude Zinc by Flame Atomic Absorption Spectrometry

作　　者：高伟 邢化冰 

机构地区：[1]国家再生有色金属橡塑材料质量监督检验中心,安徽阜阳236000 [2]阜阳市产品质量监督检验所,安徽阜阳236000

出　　处：《化学分析计量》2017年第6期27-29,共3页Chemical Analysis And Meterage

基　　金：国家标准委员会行业标准制修订基金项目(有色标秘[2016]41号)

摘　　要：建立火焰原子吸收光谱法测定粗锌中的铜含量。采用硝酸–酒石酸溶解样品,并以其为测定溶液介质,检测波长为324.7 nm,以水为参比,采用空气–乙炔火焰以原子吸收光谱仪进行测定。在优化的实验条件下,铜的质量浓度在0.10~2.50μg/m L范围内与吸光度有良好线性关系,相关系数为0.999 7,方法检出限为0.01μg/m L。测定结果的相对标准偏差为1.0%~3.0%(n=11),样品加标回收率为97%~102%。该方法具有灵敏度高,干扰少,重现性好等优点,适用于铜含量在0.001%~0.50%之间的粗锌中铜的测定。A method for determination of copper in crude zinc by flame atomic absorption spectrometry was developed. The samples were dissolved by nitric acid–tartaric acid, and nitric acid–tartaric acid as the medium of the determination solution, and the content of copper in crude zinc was determined by atomic absorption spectrophotometer with an air–acetylene flame at a wavelength of 324.7 nm and water as reference. Under the optimal conditions, the mass concentration of copper had a good linear relationship with absorbance in the range of 0.10–2.50 μg/mL, the correlation coefficient was 0.999 7, the detection limit was 0.01 μg/mL. The relative standard deviation of determination results were 1.0%–3.0%（n=11）, and the sample recoveries were 97%–102%. The method has the advantages of high sensitivity, low interference and good reproducibility, which is suitable for determination of copper in crude zinc whose copper content between 0.001% and 0.50%.

关 键 词：火焰原子吸收光谱法 粗锌 铜 

分 类 号：O657.3[理学—分析化学]