“…Sitko et al (65) developed an ED-XRF spectrometer for standardless analysis of samples of various sizes. In the constructed spectrometer, the radiation from the Ag target X-ray tube excites the secondary target and the characteristic radiation of the second target, which is monochromatized using a LiF (200) crystal, excites elements in the analyzed sample. The X-ray spectra are collected by a thermoelectrically cooled Si-PIN detector.…”