高盐分海洋沉积物样品洗盐预处理方法的研究  

Method for Salt-Washing Pretreatment of High-Salty Marine Sediment Samples

作　　者：张辉[1,2] 朱爱美[1,2] 张俊[1,2] 何连花[1,2] 刘季花[1,2] 李华芹 高晶晶[1,2] 崔菁菁[1,2] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061 [3]武汉地质矿产研究所,湖北武汉430205

出　　处：《海洋科学进展》2012年第3期423-431,共9页Advances in Marine Science

基　　金：国家自然科学基金项目--太平洋富钴铁锰结壳铂族赋存状态及其富集机制研究(40976038);国家海洋局第一海洋研究所基本科研业务费专项资金项目--黄河尾闾摆动在现代黄河水下三角洲的沉积记录(GY02-2009G22)

摘　　要：选取不同沉积类型海洋沉积物通过3步洗盐法和连续洗盐法进行探索实验。结果表明,3步洗盐法不适用于海洋沉积物洗盐,原因在于第2步洗盐时上清液出现水溶胶,而胶体中元素在总沉积物中占一定比例。若弃去胶体,势必会对后续测定工作产生负误差。分析3步洗盐上清液中Na的质量分数,表明一步洗盐便可达到洗盐要求,且最佳浸泡洗盐时间为30h。An exploratory experiment was made of different types of marine sediments by means of three- steps salt washing and continuous salt washing. The results indicate that the method of the three-steps salt washing does not hold for marine sediments, because hydrosol occurs in the supernatant at the second step of the three-steps salt washing, and the chemical elements in the hydrosol make up a certain proportion of the total in the sediments. If the hydrosol is removed, a negative deviation could be produced for the next work. The analysis of the Na content in the supernatant left after the three-steps salt washing has shown that one-step salt washing can meet the requirements of salt washing for marine sediments, and the best immersion time for salt washing is about 30 hours.

关 键 词：海洋沉积物 洗盐 元素地球化学分析 

分 类 号：P595[天文地球—地球化学]