摘要
采用微波消解技术消解催化剂样品 ,确定了微波消解催化剂的最佳工作条件 ,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。二者结合可以快速、准确测定催化剂中钴和镍 ,并且样品损失少、酸用量少、大大降低环境污染。钴和镍的线性范围分别为 0～ 30 μg·2 5mL-1和 0～ 2 5 μg·2 5mL-1,标准合成样品的回收率分别在 98 2 %～ 10 3 6 %和 97 9%～ 10 3 7%之间。催化剂测定结果表明 ;钴和镍的相对标准偏差分别≤ 2 2 %和≤ 1 8% ;相对误差均≤± 2 5 %。
Catalyst samples are digested in a microwave digestion system. The optimum parameters for microwave digestion are selected. Cobalt and nickel in the mixture of Co2+ and Ni2+ with 4-(2-pyridylazo) resorcinol (PAR) can be determined simultaneously by dual-wavelength equal absorption spectrophotometry. By means of the combination of two methods, Co2+ and Ni2+ in catalyst can be determined rapidly, accurately, and contamination problems avoided. The linear ranges are 0-30 mug(.)25 mL(-1) for Co2+ and 0-25 mug(.)25 mL(-1) for Ni2+. The recoveries of Co2+ and Ni2+ in synthetic samples are between 98.2 % - 103.6 % and between 97.9 % - 103.7 %, respectively. The relative standard deviations of analytical results in catalyst samples are less than 2.2 % for Co2+ and less than 1.8 % for Ni2+, and relative errors are less than +/- 2.5 % for Co2+ and Ni2+
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2001年第4期531-533,共3页
Spectroscopy and Spectral Analysis
关键词
微波消解
双波长等吸收分光光度法
催化剂
钴
镍
同时测定
microwave digestion
dual wavelength equal absorption spectrophotometry
catalyst
cobalt
nickel
