| 摘要 |
An amperometric cell modified for high pressure operation is described. The cell is a flow-through type cell defining a flow path and has at least one active testing electrode, at least one reference electrode and at least one counter electrode operatively disposed and electrically insulated from one another within the cell flow path. In a preferred embodiment the flow cell is encapsulated within a high impact, chemically resistant, chemically insulating material, and has a pair of high pressure resistance fittings communicating with the flow path and extending in part beyond the encapsulation. The cell has particular utility for use with a liquid chromatography separation and when placed in line upstream of sample injection, will remove selected electroactive components in the carrier fluid and thereby reduce background level of contaminents reaching the column and eluting from the column. The cell may also be placed in line following sample injection whereby it may be employed to electrochemically modify selected materials in the mobile phase whereby to change their chromatographic characteristics. |
