X-ray fluorescence technology provides one of the simplest, most accurate and most economic analytical methods for the determination of the chemical composition of many types of materials. It is non-destructive and reliable, requires no, or very little, sample preparation and is suitable for solid, liquid and powdered samples. It can be used for a wide range of elements, from beryllium (4) to uranium (92), and provides detection limits at the ppm level; it can also precisely measure concentrations of up to 100%.