亚硝基R盐分光光度法测定合金钢中钴  

Nitroso-R-salt spectrophotometric determination of cobalt in alloy steel

作　　者：姚喆[1] 冯振华[1] 柴成文[1] 刘杰民[1] 

机构地区：[1]北京科技大学化学与生物工程学院,北京100083

出　　处：《中国无机分析化学》2011年第1期61-64,共4页Chinese Journal of Inorganic Analytical Chemistry

基　　金：国家自然科学基金资助(20877008);新世纪优秀人才支持计划(NCET-09-0218);中央高校基本科研业务费专项资金资助

摘　　要：本文改进了亚硝基R盐分光光度法测定合金钢中钴的分析方法,并详细探讨了该方法中吸收波长、缓冲溶液、氧化剂、消解酸种类、加热时间、共存离子等测定条件对结果准确度和精密度的影响。结合示差光度法,在不需分离铁、铜、镍、铬等干扰元素的条件下,可适用于测定合金钢中高含量钴,相对误差在3%以下,相对标准偏差小于1%。测定高含量钴标准样品时,结果令人满意。本方法线性范围宽,重现性好、分析速度快、准确度高,可满足生产分析需要。A better Nitroso-R-salt spectrophotometric method was established to determine cobalt content in alloy steel. The influence of various experimental parameters, including wavelength, buffer solutions, oxidant, acid types, heating time and coexist ions, on the accuracy and precision were investigated in detail. Combining with differential photometry, the high content of cobalt in alloy steel can be determined in the presence of the interference elements such as Fe, Cu, Ni and Cr etc. The relative error is under 3 and relative standard deviation is under 1%. The test result for the cobalt standard with high content is satisfactory. It was proved that the method we developed in this paper has wide linear range, good reproducibility, fast speed and high accuracy, which is suitable for quality control in industry.

关 键 词：亚硝基R盐 分光光度法 合金钢 钴 

分 类 号：O657.32[理学—分析化学]