电感耦合等离子体原子发射光谱法测定白云鄂博富钾板岩中铁、钙、镁、铝和钡的含量  

ICP-AES Determination of Iron,Calcium,Magnesium,Aluminum and Barium in Rich-Kalium Slate from Baiyunobo Mine

作　　者：于亚辉[1,2] 王丽娟 王素梅 张慧珍[1,2] 张秀艳 YU Yahui;WANG Lijuan;WANG Sumei;ZHANG Huizhen;ZHANG Xiuyan(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China;Rui Ke National Engineering Research Centre of Rare Earth Metallurge and Function Materials Co.,Ltd.,Baotou 014030,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,包头014030 [2]瑞科稀土冶金及功能材料国家工程研究中心有限公司,包头014030

出　　处：《理化检验（化学分册）》2021年第8期742-745,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：建立了电感耦合等离子体原子发射光谱法(ICP-AES)测定白云鄂博富钾板岩中Fe、Ca、Mg、Al、Ba含量的方法。将0.3 g富钾板岩样品置于镍坩埚中,用2.0 g氢氧化钠和2.0 g过氧化钠于750℃熔解,再加入20 mL盐酸进行酸化,采用ICP-AES测定其中Fe、Ca、Mg、Al、Ba的含量。Fe、Ca、Mg、Al、Ba的最佳分析谱线分别为259.940,396.847,279.553,396.152,493.408 nm。结果表明,Fe、Ca、Mg、Al、Ba的质量浓度在一定范围内与其对应的发射强度呈线性关系,检出限(3s)依次为0.016,0.015,0.0024,0.016,0.014 mg·L^(-1)。按上述方法测定钾长石标准物质(GBW 03116)和富钾板岩样品中Fe、Ca、Mg、Al、Ba的含量,测定值的相对标准偏差(n=11)为0.45%~7.0%,标准物质的测定值与认定值相符。按标准加入法进行回收试验,回收率为95.2%~100%。A method for the determination of Fe,Ca,Mg,Al and Ba in rich-kalium slate from Baiyunobo mine by inductively coupled plasma-atomic emission spectrometry(ICP-AES)was developed.Rich-kalium slate sample of 0.3 g was placed in a nickel and melted at 750℃with sodium hydroxide of 2.0 g and sodium peroxide of 2.0 g,and then acidized by 20 mL hydrochloric acid.The contents of Fe,Ca,Mg,Al and Ba in the sample were determined by ICP-AES.Optimal analytical spectral lines of Fe,Ca,Mg,Al and Ba were 259.940,396.847,279.553,396.152 and 493.408 nm.The results showed that linear relationships between values of mass concentration of Fe,Ca,Mg,Al,Ba and their emission intensity were kept in definite ranges,with detection limits(3s)of 0.016,0.015,0.0024,0.016,0.014 mg·L^(-1).The contents of Fe,Ca,Mg,Al,Ba in reference material of potassium feldspar(GBW 03116)and rich-kalium slate sample were determined by this method,giving RSDs(n=11)of the determined values in the range of 0.45%-7.0%.The determined values of reference material were consistent with its certified values.Recovery test was made by standard addition method,giving results in the range of 95.2%-100%.

关 键 词：电感耦合等离子体原子发射光谱法 白云鄂博富钾板岩 铁 钙 镁 铝 钡 

分 类 号：O657.31[理学—分析化学]