Assay

Assay

Dr. KennedyAn assay is an analysis done to determine the presence of a substance and the amount of that substance. Thus, an assay may be done for example to determine the level of thyroid hormones in the blood of a person suspected of being hypothyroid (or hyperthyroid). The term is also used to denote the determination of biological or pharmacological potency of a drug. For example, an assay may be done of a vaccine to determine its potency.

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