摘要
研究并确定了微波消解合金钢的最佳条件 ,应用双波长等吸收方法解决了PAR -Co2 + ,Ni2 + 体系中Co2 + ,Ni2 + 同时测定问题。测定了标准合成样品中的Co2 + 和Ni2 + ,其回收率分别在 98 2 %～ 10 3 6 %和 97 9%～ 10 3 7%之间。对多种合金钢样品中Co2 + 和Ni2 + 进行测定 ,钴和镍的相对标准偏差分别≤ 1 0 0 %和≤ 1 10 % ;相对误差分别≤± 2 5 %和≤±2 0 % ,均优于常压消解合金钢样品所得结果。采用本法测定合金钢中钴和镍 ,快速、准确、样品损失少、酸用量少 ,并大大降低环境污染。
In this paper, alloy steel samples are digested in the sealed vessel by the microwave digestion system. The optimum parameters for microwave digestion are studied and selected. Cobalt and nickel in the colored system of Co 2+ and Ni 2+ 4 (2 pyridylazo) resorcinol (PAR) can be determined simultaneously by dual wavelength equal absorption spectrophotometry. The recoveries of Co 2+ and Ni 2+ in synthetic samples are within 98.2%-103.6% and within 97.9%-103.7%, respectively. The relative standard deviations of analytical results in alloy steel are less than 1.00% for Co 2+ and less than 1.10% for Ni 2+ , and relative errors are less than ±2.5% for Co 2+ and less than ±2.0% for Ni 2+ . These results are all less than those of digestion in atmosphere. The experimental results show that the method is rapid, precise, and less contaminative.
出处
《冶金分析》
CAS
CSCD
北大核心
2001年第1期27-29,共3页
Metallurgical Analysis
关键词
微波消解
双波长等吸收分光光度法
合金钢
钴
镍
测定
microwave digestion
dual wavelength equal absorption spectrophotometry
alloy steel
cobalt
nickel
