摘要
采用微波法消解催化剂 ,研究确定了微波消解催化剂的最佳工作条件。应用零交截距导数分光光度法解决了 PAR- CO2 +、PAR- Ni2 +体系中 Co2 +、Ni2 +的同时测定。钴和镍的线性范围分别为 0～ 30 μg/ 2 5m L和 0～ 2 5μg/ 2 5m L,催化剂样品中钴和镍测定结果的相对标准偏差 (n=5)分别≤ 1 .5%和≤ 1 .0 % ,与标准值相对误差分别≤± 1 .5%和≤± 2 .1 %。本方法测定催化剂中钴和镍 ,酸用量少 。
Catalyst samples were digested in a closed microwave digestion system.The optimum parameters for microwave digestion were studied. Cobalt(Ⅱ) and nickel(Ⅱ) complexed with 4 (2 pyridylazo) resorcinol(PAR) were determined by zero crossing derivative spectrophotometry. The linear ranges are 0～30μg/25 mL for Co 2+ and 0～25 μg/ 25 mL for Ni 2+ ,respectively. The relative standard deviation of analytical results for catalyst samples is less than 1.5% for Co 2+ and less than 1.0% for Ni 2+ ( n =5),respectively. The relative errors compared with standard values are less than ±1.3% and ±2.1%,respectively. The experimental results show that the method is rapid,precise,and less contaminating.
出处
《分析试验室》
CAS
CSCD
2000年第5期59-61,共3页
Chinese Journal of Analysis Laboratory
关键词
微波消解
分光光度法
催化剂
钴
镍
测定
Microwave digestion
Zero crossing derivative spectrophotometry
Catalyst
Cobalt
Nickel
