column diameter
3.The experimental results show that the source has successfully produced a homogeneous plasma column in diameter over 160mm with electron density of 10 10 -10 11 cm -3 and electron temperature of several eV at a pressure below 230Pa. This manifests that the source is adaptable applications for large area and large volume plasmas.
4.A capillary column with wide-diameter was used to separate DMF. The detection limit could reach 0. 001mg/m~3 (the absolute value was 10~(-3)ng).
5.Separation of 2 mg Rb from the same amount of Cs has taken place successfully in 0.2NHCl with the help of an exchange column of 0.6cm diameter and 15.5cm length by using 0.25N NH4NO3-0.2NHCl and 3.78N NH4NO3 as an eluant for Rubidium and Caesium under the condition of an exhausting flow of 0.17ml/min.
9.Methods We put 4 g iodine supplement reagent into a vitreous column(20 cm in length and 2 cm in diameter) whose bottom is covered a micro bore vitreous filtering board. A 2 mm thick carbon fiber layer was put onto the iodine supplement reagent. Experiment using water flows through the three layers of the instrument at 1 L/min,the iodine concentration of the filtering water was measured.

