Determination of palladium in waste palladium-carbon catalyst by inductively coupled plasma atomic emission spectrometry
WEI Xiao-juan1, LIU Qiu-xiang2, XIE Zhi-ping2, PAN Jian-ming2 CHEN Bo2, MA Yin-biao2
1. Zhejiang Province Key Laboratory of Nobel Metal Catalytic Materials and Technology ,Hangzhou 310011, China; 2 .Zhejiang Metallurgical Research Institute Co., Ltd., Hangzhou 310011, China
Abstract：The dried waste palladium-carbon catalyst sample was digested with aqua regia in a pressure tank with polytetrafluoroethylene liner at 180 ℃. Then, the determination method of palladium in waste palladium-carbon catalyst by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The effect of sample dissolution method, digestion time, digestion temperature and interference ions on the determination was investigated. The results showed that, the optimal effect could be achieved when the waste palladium-carbon catalyst was firstly treated by drying followed by digestion at 180 ℃ for 6 h. The elements such as Si, Al, Fe, Mg and Ca in waste palladium-carbon catalyst had no influence on the determination of palladium. The intensity of palladium was linear to its concentration in range of 0-250 mg/L. The recoveries of standard addition were between 99.6% and 100.5%. The relative standard deviation (RSD) was less than 1%. One waste palladium-carbon catalyst sample was determined by this method and atomic absorption spectrometry, and the results were consistent. The proposed method was applicable for the determination of palladium in waste palladium-carbon catalyst.
Juanjuan Y, Shuxia L, Miaomiao T, et al. Preparation and characterization of magnetic nanoparticles for the on-line determination of gold, palladium, and platinum in mine samples based on flow injection micro-column preconcentration coupled with graphite furnace atomic absorption spectrometry[J]. Talanta, 2014, 118: 231-237.
魏笑峰,蔡国辉,肖益鸿. 火焰原子吸收光谱法测定汽车尾气催化剂中Pd的研究 [J]. 光谱学与光谱分析(Spectroscopy and Spectral Analysis), 2009, 29(12): 3409-3411.
[8]
Sayed Z M, Hooshang H, Zahra M. Separation of trace amounts palladium by SiO2/TiO2/Ce nanoparticles prior to flame atomic absorption spectrometry determination in anodic slime and wastewater samples[J]. Central European Journal of Chemistry, 2013, 11(11): 1749-1756.
[9]
Mònica I, Enriqueta A, Victòria S. On-line determination of trace levels of palladium by flame atomic absorption spectrometry[J]. Talanta, 2003, 59(4): 651-657.
Petya K, Rumyana D. Ion-exchange method for separation and concentration of platinum and palladium for analysis of environmental samples by inductively coupled plasma atomic emission spectrometry[J]. Anal. Chim. Acta, 2002, 464(1): 7-13.
[12]
王旭辉. ICP-AES法测定加氢催化剂中钯含量 [J]. 石化技术(Petrochemical Industry Technology), 2006, 13(1): 30-32.
[13]
Malyutina T M, Alekseeva T Yu, Dyachkova A V. Determination of platinum and palladium in dead catalysts using inductively coupled plasma atomic emission spectrometry after sample digestion by high-temperature fusion[J]. Inorganic Materials, 2010, 46(14): 1479-1482.
