[Study on trace elements of lake sediments by ICP-AES and XRF core scanning].
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.
Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China. chengaiying1119@126.com
Ai-Ying
AY
Cheng
Jun-Qing
JQ
Yu
Chun-Liang
CL
Gao
Li-Sha
LS
Zhang
Xian-Hu
XH
He