Chemical Analysis

noun a test or analysis to determine the composition or quality of a substance

verb to analyze or examine something in order to determine its quality or nature

• The scientist conducted an assay to determine the concentration of the compound in the sample.
• The lab tech ran an assay to check the levels of the drug in the blood sample.
• I heard they're doing an assay on that new supplement to see if it actually works.
• She performed a mental assay of her feelings before making a decision.

noun a substance produced by or used in a chemical process

adjective relating to chemistry or the interactions of substances as studied in chemistry

• The scientist conducted a series of experiments to analyze the chemical composition of the substance.
• I heard that they found some weird chemicals in the old abandoned factory.
• Don't mess with those chemicals, they can be dangerous.
• The chemical reaction between them was undeniable, sparking a new relationship.