摘要
建立了基于化学逐级溶解、火试金预浓集和电感耦合等离子体质谱分析的地质样品中铂族元素的物相分析新流程。应用逐级溶解，地质样品可被分成即水溶相、可交换相、碳酸盐相、Ｆｅ／Ｎｉ金属相、硫化物相、氧化物相、硅酸盐相和残渣相８个组分。详细研究了溶解实验中试剂、温度、酸度和时间等实验参数。作为应用的实例，研究了丹麦Ｓｔｅｖｎｓ Ｋｌｉｎｔ Ｋ／Ｔ界线样品中５个铂族元素的物相分布。
A stepwise dissolution procedure for chemical speciation analysis of platinum group elements in geological samples has been improved. Eight components were separated by selectively chemical dissolution steps, i. e. water-soluble, exchangeable, carbonate, metal, sulfide, oxide, silicate and HF-insoluble residue. The experimental parameters, such as reagent, temperature, acidity and time in dissolving various phases, have been investigated in detail. The dissolution selectivity of the procedure is quite well, with a relative dissolution error of less than 4%. The chemical speciation of platinum group elements in Cretaceous/ Tertiary(K/T) boundary sample was analyzed using this revised procedure combined by inductively coupled plasma-mass spectrometry.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1998年第3期267-270,共4页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金重大项目子课题!(项目编号19392101)。
关键词
物相分布
铂族元素
地质样品
质谱法
Stepwise dissolution procedure chemical speciation platinum group elements geological samples
inductively coupled plasma-mass spectrometry
