title: Biological trace-element measurements using synchrotron radiation.
abstract: The feasibility of performing X-ray fluorescence trace-element determinations at concentrations substantially below the ppm level for biological materials is demonstrated. Conditions for achieving optimum sensitivity were ascertained. Results achieved for five standard reference materials were, in most cases, in excellent agreement with listed values.Minimum detectable limits of 20 ppb were measured for most elements.
authors.affiliation: Lawrence Berkeley Laboratory, University of California, 94720, Berkeley, CA.
authors.forename: R D
authors.initials: RD
authors.lastname: Giauque
authors.forename: J M
authors.initials: JM
authors.lastname: Jaklevic
authors.forename: A C
authors.initials: AC
authors.lastname: Thompson