HPLC analysis system contains column, electrochemical measurement cell, sample valve and interconnecting lines in tempering chamber

摘要

In the tempering chamber, in addition to the column (8) and measurement cell (3), the sample valve (4) and interconnecting lines are also contained. An Independent claim is included for the corresponding method in which the components cited, are kept at the same, defined temperature. Preferred features: The corresponding temperature control chamber and electrochemical detector are separately claimed. Spacing between components cited is minimized as far as possible, interconnecting lines being kept short. Column and measurement cell are preferably directly connected, especially being screwed together, the sample valve being similarly connected. Cell and/or sample valve are spaced away from the chamber walls. A drawer accommodates and provides access to column, cell and valve in their mountings. Its front panel seals the chamber when closed. The chamber is thermally insulated. In one wall a reversible Peltier element is associated with air duct inside the chamber. An axial fan in the wall separating the duct from the main volume of the chamber is directed onto the Peltier element. The duct has outlet openings into the front and rear halves of the chamber on a side opposite the Peltier element. The duct is on the upper wall of the chamber. Further ducting and openings are provided in the chamber. Connecting lines are provided for the sample valve and cell via a traveling connection system.