Determination of Rubidium and Cesium in Chloride Type Oilfield Water by Flame Atomic Absorption Spectrometry
YE Xiu-shen1, 2,ZHANG Shan-ying1, 2,LI Hai-jun1,LI Wu1,WU Zhi-jian1*
1. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China 2. The Graduate University of Chinese Academy of Sciences, Beijing 100039, China
Abstract：Flame atomic absorption spectrometry (FAAS) was applied to the determination of rubidium and cesium in chloride type oilfield water by considering the interferences of the coexistent K+,Na+,Ca2+,and Mg2+ ions. Standard curve method and standard addition method were compared in the determination of rubidium and cesium in the simulated oilfield water and the real oilfield water from the Nanyishan region in Qaidam Basin. Although rubidium and cesium have similar physical-chemical properties, they present different characters during their analyses using the FAAS technique. When the standard addition method was used for the determination of rubidium and cesium in the simulated oilfield water, the results of rubidium were very poor, whereas the results of cesium were satisfactory. When the standard curve method was used for the determination of rubidium and cesium in the simulated oilfield water, the results of both rubidium and cesium were satisfactory within the linear ranges of the standard curves. For the real oilfield water, standard addition method is also only applicable for the determination of cesium with a recovery ranging from 90% to 110%. While standard curve method is applicable for the determination of both rubidium and cesium with a recovery ranging from 90% to 110%.
Key words：Rubidium;Cesium;Flame atomic absorption spectrometry;Oilfield water
叶秀深1,2,张善营1,2,李海军1,李武1,吴志坚1* . 火焰原子吸收光谱法测定氯化物型油田水中的铷和铯[J]. 光谱学与光谱分析, 2009, 29(03): 833-836.
YE Xiu-shen1, 2,ZHANG Shan-ying1, 2,LI Hai-jun1,LI Wu1,WU Zhi-jian1* . Determination of Rubidium and Cesium in Chloride Type Oilfield Water by Flame Atomic Absorption Spectrometry . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(03): 833-836.
