| Title: | Optimization of pretreatment procedure for MeHg determination in sediments and its applications |
| Author(s): | Ji X; Liu C; Shi J; Pan G; |
| Address: | "Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China. University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China. gpan@rcees.ac.cn. University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China. gpan@rcees.ac.cn. Beijing Advanced Science and Innovation Center, Chinese Academy of Sciences, Beijing, 101407, People's Republic of China. gpan@rcees.ac.cn. Center of Integrated Water-Energy-Food studies (iWEF), School of Animal, Rural, and Environmental Sciences, Nottingham Trent University, Brackenhurst Campus, Nottingham, NG25 0QF, UK. gpan@rcees.ac.cn" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-019-05179-x |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "Methylmercury (MeHg) in sediment is difficult to be determined due to its low concentration and binding compounds like sulfide and organic matter. Moreover, wet sediment samples have been suggested to behave differently from certified reference materials in MeHg analysis. Optimal pretreatment procedure for MeHg determination in sediments has not been ascertained and whether the procedure could apply to sediment samples with complex matrix merits further research. This work firstly compared recovery results of five pretreatment procedures for MeHg determination using ERM-CC580. Using the optimal pretreatment procedure, recovery results were analyzed in different sediment samples after manipulation of moisture content, organic matter, and acid volatile sulfide. The procedure using CuSO(4)/HNO(3) as leaching solutions and mechanical shaking as extraction method was proved to produce the most satisfactory recovery results (100.67 +/- 6.75%, mean +/- standard deviation). And when moisture content varied from 20 to 80%, average recovery results in sediment samples ranged from 100 to 125%. Furthermore, before and after the manipulation of organic matter or acid volatile sulfide, spiking recovery results varied little and were all within acceptable limit (85~105%). Therefore, the procedure of CuSO(4)/HNO(3)-mechanical is proposed as a universal pretreatment method for MeHg determination in sediment samples with various characteristics" |
| Keywords: | "Environmental Monitoring/*methods Geologic Sediments/*chemistry Mercury/analysis Methylmercury Compounds/*analysis Water Pollutants, Chemical/*analysis Acid volatile sulfide Methylmercury Moisture content Organic matter Pretreatment Sediment;" |
| Notes: | "MedlineJi, Xiaonan Liu, Chengbin Shi, Jianbo Pan, Gang eng 2017YFA0207204/Ministry of Science and Technology of the People's Republic of China/ Germany 2019/04/28 Environ Sci Pollut Res Int. 2019 Jun; 26(17):17707-17718. doi: 10.1007/s11356-019-05179-x. Epub 2019 Apr 27" |
