原子吸收光谱法测定金属硅中铁  

Determination on Iron in Metal Silicon by Atomic Absorption Spectrometry

作　　者：安中庆 方海燕 赵德平 刘英波 刘维理 凌燕 AN Zhong-qing;FANG Hai-yan;ZHAO De-ping;LIU Ying-bo;LIU Wei-li;Ling Yan(Kunming Metallurgical Research Institute Limited Company,Kunming,Yunnan 650031,China;Sino-platinum Metals Co.,Ltd.,Kunming,Yunnan 650106,China)

机构地区：[1]昆明冶金研究院有限公司,云南昆明650031 [2]贵研铂业股份有限公司,云南昆明650106

出　　处：《云南冶金》2019年第6期71-74,共4页Yunnan Metallurgy

基　　金：国家标准制（修）订基金资助项目（国标委综合[2017] 128号：20173477-T-610）

摘　　要：研究了原子吸收光谱仪测定铁的酸度条件以及共存离子的影响,建立了原子吸收光谱法测定金属硅中铁含量的方法。实验表明,盐酸浓度为4%~6%时,铁质量浓度在0.50μg/mL^5.0μg/mL范围内吸光度线性良好,线性回归方程为y=0.040 76x(μg/mL)+0.002 9,R^2=0.999 5。铁的检出限按空白值3倍标准偏差计算得0.11μg/mL;试液中其他共存离子不干扰测定。按照实验方法,于7个不同实验室应用实验方法测定样品和标准样品中铁的结果均与标准值吻合;方法用于实际样品中0.053%~0.77%铁的测定,相对标准偏差(RSD,n=22)为1.30%~2.04%。The study on acidity conditions for iron determination by atomic absorption spectrometry and the effect on co-existing ion, so the determination method for iron content by atomic absorption spectrometry is established. The experiment show, when the hydrochloric acid concentration is 4%~6%, in the range of the mass concentration of iron is 0.50 μg/mL^5.0 μg/mL, the absorbance linear is good, the linear regression equation is y = 0.040 76 x(μg/mL) + 0.002 9,R^2= 0.999 5. The detection limit of iron is 0.11 μg/mL by calculation of 3 times standard deviation of blank value;There is no interference from the other co-existing ion in the test solution.According to the experimental method, the iron results in the working sample and standard sample from seven different labs matches the standard value;the determination method for 0.053%~0.77% iron in practical samples, the relative standard deviation(RSD,n=22) is 1.30%~2.04%.

关 键 词：铁 金属硅 原子吸收光谱法 

分 类 号：O657.31[理学—分析化学]