Daniel Wayne Armstrong is an American chemist who specializes in separation science, chiral molecular recognition, bioanalytic analysis, mass spectrometry and colloid chemistry.

[1][3][4] He was an associate editor for the prestigious American Chemical Society journal Analytical Chemistry.

[1][2][6] His research and patents formed the basis for two companies: Advanced Separation Technologies, Inc; which was acquires by Sigma-Aldrich Corporation in 2006[7] and AZYP, LLC in Arlington, TX.

[3] He is believed to have mentored more graduate level analytical chemists than any living scientist.

He joined University of Texas at Arlington in 2006 as the Robert A. Welch Distinguished Professor, where he currently leads a research group in diverse areas of Chiral molecular recognitions, ionic liquids, separation mechanism and theory, ultra-fast analysis, D-amino acid and peptide analysis and gas and liquid chromatography instrumentation and detectors.