an assay that relies on an enzymatic conversion reaction and is used to detect the presence of specific substances (such as enzymes or viruses or antibodies or bacteria) | a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc. |
| an appraisal of the state of affairs |
| a written report of the results of an analysis of the composition of some substance |
| a substance that is undergoing an analysis of its components |