微波消解-电感耦合等离子体原子发射光谱法法测定一氧化碳助燃剂中贵金属含量

采用微波消解技术，使用盐酸、硝酸和氢氟酸对一氧化碳助燃剂进行处理，得到测定样品的水溶液，选择波长265.945 nm和340.458 nm 作Pt和Pd的分析线，采用电感耦合等离子体原子发射光谱法测定一氧化碳助燃剂中贵金属的含量。结果表明：Pt、Pd元素校准曲线线性的相关系数均不小于0.999 0，Pt、Pd检出限分别为0.030 mg/L和0.014 mg/L；共存元素Si和Al的存在对Pt和Pd测定结果影响不大；按照本方法测定一氧化碳助燃剂样品中Pt、Pd含量的相对标准偏差（n=6）均小于3%，回收率为97.0%~104.0%。

DETERMINATION OF NOBLE METAL CONTENTS IN CARBON MONOXIDE COMBUSTION PROMOTER BY ICP-AES AFTER MICROWAVE DIGESTION

The CO combustion promoter was treated using HCl，HNO3 and HF mixed acid by microwave digestion technique to prepare sample water solution. Pt 265.945 nm and Pd 340.458 nm were selected as the analytical lines, using the determination method of inductively coupled plasma atom emission spectrometry. According to the results, the linear correlation coefficient of the calibration curve of each element was not less than 0.999 0. The detection limits of Pt and Pd were 0.030 mg/L and 0.014 mg/L, respectively. The presence of coexisting elements, Si and Al, had little effect on the determination results of Pt and Pd. According to the method of this experiment, the relative standard deviations（RSD，n=6）of results were less than 3%. The recoveries were between 97.00% and 104.0%.