1. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：It is the first time to study sediment of Toson lake in Qaidam Basin. Trace elements including Cd, Cr, Cu, Zn and Pb in lake sediment were measured by ICP-AES method, studied and optimized from different resolution methods respectively, and finally determined a optimum pretreatment system for sediment of Toson lake, namely, HCl-HNO3-HF-HClO4-H2O2 system in the proportions of 5∶5∶5∶1∶1 was determined. At the same time, the data measured by XRF core scanning were compared, the use of moisture content correction method was analyzed, and the influence of the moisture content on the scanning method was discussed. The results showed that, compared to the background value, the contents of Cd and Zn were a little higher, the content of Cr, Cu and Pb was within the background value limits. XRF core scanning was controlled by sediment elements as well as water content in sediment to some extent. The results by the two methods showed a significant positive correlation, with the correlation coefficient up to 0.673～0.925, and they have a great comparability.
Key words：ICP-AES;XRF core scanning;Sediments;Trace elements;Toson Lake
[1] WANG Su-min, XUE Bin, SHEN Ji, et al(王苏民，薛 滨，沈 吉，等). Geological Journal of China Universities(高校地质学报), 2009, 15(2): 141. [2] WEN Xiang-hua, WU Ling-zheng(文湘华, 吴玲钲). Advances in Environment al Science(环境科学进展), 1998, 6(2): 61. [3] WANG Xiang-qin, SUN Hui-feng(王湘芹，孙惠凤). Journal of Oceanography of Huanghai & Bohai Seas(黄渤海海洋)，2000，18(3): 81. [4] CHEN Dao-hua, ZHANG Xin(陈道华，张 欣). Rock and Mineral Analysis(岩矿测试), 2003, 22(1): 61. [5] TIAN Xiao-ya, CHEN Zi-chao(田晓娅，陈子超). Chinese Journal of Spectroscopy Laboratory(光谱实验室), 1995, 12(3): 21. [6] GONG Xiao-feng, CHEN Chun-li, Barbara Zimmermann, et al(弓晓峰, 陈春丽, Barbara Zimmermann, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2007, 27(1): 155. [7] Richter T O, Gaast S, Koster B, et al. New Techniques in Sediment Core Analysis. London: Geological Society, 2006, 267: 39. [8] Tjallingii R, Rhl U, Klling M, et al. Geochem Geophys Geosyst, 2007, 8(2): 2. [9] XIN Ren-xuan(辛仁轩). Plasma Emission Spectrum Analysis(等离子体发射光谱分析). Beijing: Chemical Industry Press(北京：化学工业出版社)，2005. 241. [10] Turekian K K, Wedepohl K H. Geological Society of America Bulletin, 1961, 72: 175. [11] CSBTS(China State Bureau of Quality and Technical Supervision), 2002. Marine Sediment Quality. GB 18668—2002. Beijing: Standards Press of China, 243. [12] CHI Qing-hua, YAN Ming-cai(迟清华, 鄢明才). Handbook of Elemental Abundance for Applied Geochemistry(应用地球化学元素丰度数据手册). Beijing: Geological Publishing House(北京：地质出版社), 2007. 94. [13] Lwemark L, Chen H F, Yang T N, et al. Journal of Asian Earth Sciences, 2011, 40: 1250.
