Helium Synergies also undertake Analytical testing. This refers to the use of various techniques to determine the elemental composition of materials. XRF (X-ray fluorescence spectroscopy) is one such technique. It is a non-destructive analytical technique that works by measuring the fluorescent (or secondary) X-rays emitted from a sample when excited by a primary X-ray source. Wet chemistry, on the other hand, refers to the use of traditional laboratory techniques such as titration and gravimetric analysis to determine the chemical properties of a substance.