TOTAL-REFLECTION X-RAY-FLUORESCENCE ANALYSIS WITH MONOENERGETIC EXCITATION AND FULL SPECTRUM EXCITATION USING ROTATING ANODE X-RAY TUBES

A newly constructed measuring chamber for total reflection X-ray fluorescence analysis (TXRF has been tested for several applications. Full spectrum excitation and monoenergetic excitation of the sample are compared using rotating and standing anode tubes as primary radiation source. Advantages and disadvantages of using a W-C multilayer structure as monochromator in TXRF are discussed. Extrapolated detection limits of 170 fg (1 fg = 10(-15) g) for Mn were obtained using a Cu-anode and full spectrum excitation.