微波消解-原子吸收光谱法测定催化剂中的铜、铁、镍、钠

Determination of Copper, Iron, Nickel, Sodium in Catalyst by Microwave Digestion-Atomic Absorption Spectrometry

摘要: 采用微波方法消解催化剂样品,设计正交实验研究了压力、消解时间、微波功率和酸度对消解效果的影响,并通过显著性实验对影响因素进行了分析,最终确定了微波消解催化剂样品的最佳工作参数.建立了用微波消解-原子吸收光谱法测定催化剂中铜、铁、镍、钠的方法,其测定结果的相对标准偏差分别为(n=5)≤2.3%,≤2.9%,≤2.0%,≤2.3%;加标回收率分别为95.9%~104.7%,96.1%~104.1%,97.0%~103.8%,96.5%~104.6%;相对标准偏差和加标回收率均优于常规法.该法样品

Abstract: Catalyst samples were digested in a microwave digestion system.Orthogonal design of 4 factors(temperature,time,power,and amount of acid) at 2 levels and distinct analysis experiment were applied for microwave digestion condition.The optimum parameters for microwave digestion were determined in the end.As a result,a simple,cost-effective,time-effective and environment-friendly method,microwave-AAS,for the determination of copper,iron,nickel,sodium in catalyst was obtained,respectively.The relative standard deviation(n=5) is less than 2.3% for copper,2.9% for iron,2.0% for nickel and 2.3% for sodium,respectively.The recovery is 95.9%～104.7% for copper,96.1%～104.1% for iron,97.0%～103.8% for nickel and 96.5%~104.6% for sodium,respectively.The relative standard deviation and recovery are better than conventional methods.