An assay is an investigative (analytic) procedure in laboratory medicine, mining, pharmacology, environmental biology and molecular biology for qualitatively assessing or quantitatively measuring the presence, amount, or functional activity of a target entity.

2023年9月23日 · Definition: An assay is a laboratory technique used to measure, analyze, or detect the presence, quantity, or activity of a substance within a sample. Types: Assays come in various forms, including biochemical, immunoassays, cell-based, molecular, chemical, microbiological, radiometric, and more.

2022年10月21日 · Regardless of the specific application or the particular molecule to be measured, a number of fundamental factors must be considered when developing a biological assay.

2024年3月9日 · In this article, I will discuss potency, purity and assay, the difference between potency, purity and assay, calculation of potency, purity and assay, case studies and frequently asked questions. Purity is the qualitative content of any drug substance or its stages. It may be calculated by chemicals, spectroscopic and chromatographic techniques.

2020年12月15日 · Assays can be divided into three main categories based on the type of sample used – ligand-binding assays that measure binding between a ligand and a receptor, immunoassays that detect antibody-antigen binding, and bioassays that measure biological activity in response to certain stimuli.

In this issue of Nature Biomedical Engineer-ing, we highlight eight methods that exemplify these utility considerations.

An assay is a well-defined analytical method that contains the measurement procedure and how the measurement should be interpreted to obtain the properties of a system or object.

Assays and measurement systems must be viewed as a process. The measurement process is made up of methods, software, materials and chemistry, analysts, sample preparation, environmental conditions and instrumentation/equipment.

Nelson Labs performs assay tests on active pharmaceutical ingredients (APIs) and finished products, using techniques such as the following: High Performance (or Ultra High Performance) Liquid Chromatography (HPLC or UHPLC)

2019年2月26日 · Assays are used in a diverse range of fields within the life sciences, and have become routine work in forensic, pharmaceutical, and microbiology labs. When designing an assay for any purpose,...