Dr. Hayes is a Research Chemist at NIST, where he focuses on analytical method development for dietary supplementation reference materials. His current research efforts are applied to development of multiple botanical reference materials in the ginseng family. He also focuses on water-soluble vitamin determination in various supplement-based materials. Hugh has also implemented multidimensional chromatographic methods for the detection and identification of polycyclic aromatic hydrocarbons (PAHs) in environmental samples.