Portable Device for the Quantitative Determination of Trace Elements in Water in the Sub-Nano Gram Sensitivity Range.

摘要

Alpha particles and protons from charged particle accelerators and photons from both x-ray tubes and radioactive sources have been shown to be useful for the excitation of characteristic x-rays for multi-element energy dispersive trace analysis of environmental samples to the few ppm range. The use of 4.5MeV alpha particles from a thin window Po-210source (tl/2=138.4d) of 5mCi effective strength to directly excite x-rays from trace elements in 1cc water samples. Minimum detectable amounts (MDA's) were established for 20elements (22