| 摘要 |
<p>An improved apparatus for electrochemically analyzing fluids containing electrochemically active material (eg blood and cerebrospinal fluids) is described. The apparatus comprises a liquid chromatographic column for time spaced separation of eluted materials therfrom, and an electrochemical detector (10) for testing material samples in solution. The improvement is characterized in that said detector has at least three measuring cells (24, 26 28) with working electrodes (34c 34d 34e) at different potentials to provide different electrochemical measurements for electrochemically active species passing sequentially through said cells, which cells are arranged to operate at progressively varying potentials along said flow path, in that means are provided for displaying said measurements so as to separate them by measuring potentials as well as by elution time, and in that said cells are sufficiently close that time of transit of eluant between them is insignificant with respect to overall elution times. The invention includes methods of identifying an abnormality in a body fluid on an individual using such apparatus.</p> |
