碱熔-电感耦合等离子体原子发射光谱(ICP-AES)法测定碳载钌催化剂中钌  

Determination of Ruthenium in Carbon-borne Ruthenium Catalyst by Alkali Melting Inductively Coupled Plasma Atomic Emission Spectroscopy(ICP-AES)Method

作　　者：刘桂彬 佡云 马晓卉 LIU Gui-bin;NAO Yun;MA Xiao-hui(Shenyang Non-ferrous Metals Research Institute Co.,Ltd.,Shenyang 110141,China)

机构地区：[1]沈阳有色金属研究院有限公司,辽宁沈阳110141

出　　处：《有色矿冶》2024年第5期55-58,共4页Non-Ferrous Mining and Metallurgy

摘　　要：钌作为一种酸难溶物质,在经过常规酸溶处理后,利用电感耦合等离子体原子发射光谱法(ICP-AES)进行测定时,其检测准确性较低。为了准确分析贵金属催化剂中钌的含量,本研究设计了一种碱熔-电感耦合等离子体原子发射光谱(ICP-AES)方法。实验过程中,采用氢氧化钾进行样品熔解,经盐酸酸化后定容,选择钌267.876 nm为分析谱线进行测定。经过一系列实验探索,确定了0.4 g样品加入2.0 g氢氧化钾,在400℃的马弗炉内加热反应5 min为最适宜的熔解条件。该元素的校准曲线线性相关系数可达0.999,检出限为0.019 mg/L。将该实验方法应用于样品中钌的测定,测定结果的标准偏差及加标回收率均在允许范围内,可满足碳载钌催化剂中钌含量测定需求。Ruthenium,as an acid refractory substance,has low detection accuracy by using inductively coupled plasma atomic emission spectroscopy(ICP-AES)after conventional acid dissolution treatment.In order to accurately analyze the content of ruthenium in precious metal catalysts,an alkali melting-inductively coupled plasma atomic emission spectroscopy(ICP-AES)method was designed in this study.During the experiment,potassium hydroxide was used for sample melting,and ruthenium 267.876 nm was selected as the analytical line.After a series of experimental exploration,it was determined that 0.4 g sample was added to 2.0 g potassium hydroxide,and the heating reaction in 400℃ mafer furnace for 5 min was the most suitable melting condition.The linear correlation coefficient of the calibration curve of this element can reach 0.999 with a detection limit of 0.019 mg/L.The experimental method is applied to the determination of ruthenium in the sample,and the standard deviation and spike recovery of the measurement results are within the allowable range,which can meet the requirements of the determination of ruthenium content in the carbon-borne ruthenium catalyst.

关 键 词：碳载钌催化剂 钌 碱熔 ICP-AES 

分 类 号：O657.31[理学—分析化学]