"biological matrices" refers to the substances found in living organisms. These can include tissues, fluids, or samples like blood, urine, or cells that are collected for scientific analysis. Full definition
We provide services using LC / MS / MS for quantitation of small molecules in complex biological matrices, such as plasma, urine and cell extracts. (lerner.ccf.org)
The Clinical Biomarkers Facility offers services for high - throughput and highly specific analyses of protein biomarker candidates in body fluids such as plasma, serum, cerebrospinal fluids etc. and cell and tissue lysates using molecular tools such as proximity extension and proximity ligation technologies (PEA and PLA) providing assays with high specificity and sensitivity in complex biological matrices. (scilifelab.se)
Nicole Gehrke, a former Ph.D. student in the lab, had recently managed to fill a biological matrix with mineral to reproduce nacre, a composite, iridescent, calcium carbonate — rich material formed in the inner shell of some mollusks and commonly known as mother of pearl. (sciencemag.org)