A method detection limit for potential in vivo arsenic measurements with a 50W x-ray tube

摘要

Using a 50 W x-ray tube as the fluorescing source, an x-ray fluorescence system was designed to measure arsenic in superficial layers of tissue-simulating phantoms. The detection limit for arsenic in the phantoms at a setting of 35 kV and with 200 mu m of a Mo filter was 0.40 +/- 0.06 mu g As g(-1). This measurement results in an effective dose of 0.6 mu Sv.