Trace amounts of molybdenum in water and soil extract samples were determined using a dual column on-line ion-exchange preconcentration FIA-ICP system.
本文采用双柱在线离子交换预浓缩FIA-ICP系统，建立了水及土壤浸出液中痕量钼的测定方法。
2
To study the method to detect trace arsenic and mercury in sea water in the same time with dual channel atomic fluorescence.
建立了双道原子荧光同时测定海水中痕量砷和汞的方法。
3
It is meaningful to understand equilibrium and dual nature of trace elements in human body.