Synonyms for assay

noun

• an appraisal of the state of affairs
• 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.
• a substance that is undergoing an analysis of its components
• a written report of the results of an analysis of the composition of some substance

verb

• make an effort or attempt
• analyze (chemical substances)