DECEMBER, 1970 THE ANALYST Vol. 95, No. I137 X-ray Fluorescence Analysis A Review* BY K. G. CARR-BRION AND K. W. PAYNE (Warre9z Spring Laboratory, Stevenage, Hertfovdshire) SUMMARY OF CONTENTS Introduction X-ray excitation X-ray tubes Electron and proton excitation Radioisotope sources Detectors Electronics Monoch