火焰原子吸收光谱法测定粗锌中的铅含量  

Determination of Lead in Crude Zinc by Flame Atomic Absorption Spectrometry

作　　者：孙丽影 丁轶聪 

机构地区：[1]阜阳市产品质量监督检验所,安徽阜阳236000

出　　处：《湖南有色金属》2017年第6期68-71,共4页Hunan Nonferrous Metals

基　　金：基金项目:全国有色金属标准化技术委员会制定<粗锌化学分析方法>单元素分析方法行业标准(有色标秘[2016]41号)

摘　　要：粗锌样品经酒石酸-硝酸溶液溶解,以体积分数约为6%的硝酸为测定介质,使用空气-乙炔火焰,以水调零,选定283.3 nm为测定波长,建立了火焰原子吸收光谱法(FAAS)测定粗锌样品中铅的方法。在选定的仪器条件下,铅在2.00~12.00 g/m L范围内和其对应的吸光度呈良好的线性关系,相关系数为0.999 8,方法检出限为0.02 g/m L。干扰试验表明,锌的基体和其它杂质元素均不干扰对铅的测定。方法的加标回收率为96.3%~105.0%,相对标准偏差(RSD,n=7)在1.3%~3.0%之间。此方法具有准确可靠,灵敏度高,干扰少,重现性好等优点,适用于粗锌中铅含量(0.002%~5.0%)的测定。The crude zinc sample was dissolved in the tartaric acid-nitric acid solution. The nitric acid was used as the measuring medium with the volume fraction of about 6%. The flame atomic absorption spectrometry was established by using the air-acetylene flame,the water was zero and 283. 3 nm was selected as the determination wavelength,which is for the determination of lead in crude zinc samples. Under the condition of selected instruments,lead had a good linear relationship with the corresponding absorbance in the range of 2. 00 ~ 12. 00 μg/m L,the correlation coefficient was 0. 999 8,and the detection limit was 0. 02 μg/m L. Interference tests show that zinc matrix and other impurity elements do not interfere with the determination of lead. The recoveries were 96. 3% ~ 105. 0%and the relative standard deviations（ RSD,n = 7） were between 1. 3% and 3. 0%. The method has the advantages of accurate and reliable,high sensitivity,less interference and good reproducibility. It is suitable for the determination of lead content in crude zinc（ 0. 002% ~ 5. 0%）.

关 键 词：铅 粗锌 火焰原子吸收光谱法 

分 类 号：TG115.33[金属学及工艺—物理冶金]