A portable XRF analyzer, within 30 seconds, the instrument will indicate if the sample passes or fails the screening test. Portable rapid spectroscopic technologies, which analyze the dispersion of an object's light to determine the object's chemical or molecular composition, may hold the key to a new era of product-safety screening. By allowing investigators to screen products earlier in the supply chain, these portable devices could significantly cut risks from contamination or counterfeiting of medicines, dietary supplements, cosmetics, and perhaps even foods. X-ray fluorescence (XRF) is the emission of characteristic secondary (or fluorescent) X-rays from a material that has been excited by bombarding with high-energy X-rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis, particularly in the investigation of metals, glass, ceramics and building materials, and for research in geochemistry, forensic science and archaeology.