| 摘要 |
<p>A differential polarimeter is disclosed for detecting changes in optical rotation between a test cell (10) and reference cell (12). The test cell (10) contains a fluid sample exposed to an analyte specific enzyme; the reference cell (12) contains a fluid sample not exposed to the enzyme. To enhance the sensitivity of the system a phase sensitive differential polarimetric technique is taught. In this technique, the phase difference between two resulting sinewave voltages is a measure of analyte concentration.</p> |
