Ultraviolet-Visible Spectroscopy / UV-Vis SpectrometerRefers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region. This means it uses light in the visible and adjacent (near-UV and near-infrared (NIR)) ranges. The absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved. In this region of the electromagnetic spectrum, molecules undergo electronic transitions.
United States Pharmacopeia (USP)The official pharmacopeia of the United States, published dually with the National Formulary as the USP-NF. Prescription and over-the-counter medicines and other health care products sold in the United States are required to follow the standards in the USP-NF. USP also sets standards for food ingredients and dietary supplements.
USDA (US Department of Agriculture)Federal agency that develops and executes policy on farming, agriculture, forestry and food. USDA has jurisdiction over dietary supplements because people ingest supplements, and therefore places where they are manufactured are considered food facilities, and must follow the guidelines set forth by the USDA and others.