Selective X-ray Bragg Spectrometry: Optimizing Fluorescence Microprobe Sensitivity for Precious Metals
نویسندگان
چکیده
CSIRO Exploration & Mining, Mineralogy, South Australian Museum, North Terrace, Adelaide, SA 5000, Australia CSIRO Exploration & Mining, School of Geosciences, Building 28E, Monash University, Clayton, VIC 3168, Australia Experimental Facilities Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave, Argonne IL 60439 USA Australian Synchrotron Research Program (ANSTO), Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave, Argonne IL 60439 USA Mineralogy, South Australian Museum, North Terrace, Adelaide, SA 5000, Australia CRC LEME, School of Earth and Environmental Sciences, University of Adelaide, Adelaide SA 5005, Australia
منابع مشابه
Calcium-dependent copper redistributions in neuronal cells revealed by a fluorescent copper sensor and X-ray fluorescence microscopy.
Dynamic fluxes of s-block metals like potassium, sodium, and calcium are of broad importance in cell signaling. In contrast, the concept of mobile transition metals triggered by cell activation remains insufficiently explored, in large part because metals like copper and iron are typically studied as static cellular nutrients and there are a lack of direct, selective methods for monitoring thei...
متن کاملHigh resolution Bragg-Fresnel optics for nanometer scale methods with soft X-rays
The main principles and some applications of Bragg-Fresnel multilayer optics are described. An elliptical Bragg-Fresnel multilayer lens (BFML), designed and fabricated in the IMT RAS has been used for Zdimensional focusing of the white X-ray synchrotron beam. For the beam energy of about 12 KeV the spot size checked with the knife edge method was about lpm. As an example of a successful applica...
متن کاملSample digestion methods for the determination of traces of precious metals by spectrometric techniques.
Recent advances in digestion methods used in the analysis of precious metal samples by spectrometric techniques are reviewed. The applicability of a fire assay, a wet acid treatment, chlorination and alkaline oxidizing fusion to a quantitative recovery of metals from various materials is discussed. Data on the precious metal contents obtained by using particular digestion methods as well as UV-...
متن کاملBiological applications of X-ray fluorescence microscopy: exploring the subcellular topography and speciation of transition metals.
Synchrotron X-ray fluorescence microscopy (SXRF) is a microanalytical technique for the quantitative mapping of elemental distributions. Among currently available imaging modalities, SXRF is the only technique that is compatible with fully hydrated biological samples such as whole cells or tissue sections, while simultaneously offering trace element sensitivity and submicron spatial resolution....
متن کاملThe distribution of trace precious metals in minerals and mineral products
DATA on the distribution of the precious metals (Au, Ag and the platinum=group elements Ru, Rh, Pd, Os, Ir, Pt) are rapidly accumulating as a consequence of the application of microbeam analytical techniques such as the electron microprobe, the proton microprobe, and the ion microprobe. The new data obtained with these techniques build on knowledge accumulated over the last 140 years using bulk...
متن کامل