Bioanalytical chemistry is a branch of analytical chemistry that focuses on the development and application of methods for the analysis of biological samples. This field typically involves the study of biological molecules such as proteins, nucleic acids, lipids, and metabolites, and aims to understand their structure, function, and interactions in biological systems. Bioanalytical chemistry methods can be used in various applications, including drug development, disease diagnosis, environmental monitoring, and food safety testing. These methods often involve techniques such as chromatography, mass spectrometry, immunoassays, and biosensors, and play a crucial role in advancing our understanding of biological processes and improving human health.