原子吸收法测定高浓度硫酸钴和不同基体对测定的影响探究  

Exploration of Measuring High Concentration Cobalt(Ⅱ) Sulfate by Atomic Absorption Spectrometry and Influence of Different Matrix

作　　者：温武深 黄乐 代超 黄开良 张道平 Wen Wushen;Huang Le;Dai Chao;Huang Kailiang;Zhang Daoping(Shenzhen Jiejing Technology Co.,Ltd.,Guangdong,518000)

机构地区：[1]深圳市捷晶科技股份有限公司,广东518000

出　　处：《当代化工研究》2024年第9期51-54,共4页Modern Chemical Research

摘　　要：实验采用不同无机酸作为基体,将高浓度硫酸钴溶液进行一定倍数稀释后,使用原子吸收测定硫酸钴含量的偏差。实验表明:硫酸根对钴的吸光度有负干扰,盐酸作基体的条件下,测定的硫酸钴含量明显偏低,0.25 mg的铝或镧可以掩蔽0.82 mg左右的硫酸根干扰;使用硫酸或者硝酸作基体可以屏蔽负干扰,硫酸钴的测定结果范围在99.1%~101.6%,相对标准偏差<1.33%。The experiment uses different inorganic acids as the matrix,dilutes the high concentration cobalt sulfate solution to a certain degree,and uses atomic absorption to determine the deviation of cobalt sulfate content.The experiment shows that sulfate ions have negative interference with the absorbance of cobalt.Under the condition of hydrochloric acid as the matrix,the measured cobalt sulfate content is significantly lower,and 0.25 mg of aluminum or lanthanum can mask the interference of sulfate ions of about 0.82 mg;The use of sulfuric acid or nitric acid as a matrix can shield negative interference,and the determination range of cobalt sulfate is 99.1%~101.6%,with a relative standard deviation of less than 1.33%.

关 键 词：原子吸收 高浓度硫酸钴 基体 掩蔽 

分 类 号：O657.31[理学—分析化学]