[Elemental analysis of biological objects by characteristic x-ray radiation excited by protons]

The results of the analysis of white mouse blood according to characteristic X-radiation (CXR) stimulated by the protones with the energy of 2,5 Mev are presented. CXR was recorded by spectrophotometry on the basis of siliceouslithium detector with energetic resolution of 260 ev by the generator of the exact amplitude and 290 ev along the line of 6,4 kev Co57. Sensitivity (3 divided by 5)-10(-8)g was reached. The analysis according to CXR permits to reveal microelements in the quantities 10(-10)--10(-12) g. Small quantities of the substance are required.