Laboratory total reflection X-ray fluorescence analysis for low concentration samples ☆

Abstract Quantitative elemental determination for concentrations in the ppb range requires a careful preparation of the sample. In particular, for elemental analysis of very low concentration samples, less than 1 ng/mm 2 , a very bright X-ray source, typically synchrotron radiation (SR) in total external reflection fluorescence regime (SR-TXRF), is required. Here, we wish to demonstrate that a conventional source combined with a polycapillary semi-lens can provide a quasi-parallel beam intense enough for desktop TXRF analysis of low concentration samples.

[1]  D. Hampai,et al.  X-ray propagation through hollow channel: PolyCAD – a ray tracing code , 2006 .

[2]  Sultan B. Dabagov,et al.  REVIEWS OF TOPICAL PROBLEMS: Channeling of neutral particles in micro- and nanocapillaries , 2003 .

[3]  G. Falkenberg,et al.  Determination of the elemental distribution in human joint bones by SR micro XRF , 2008 .

[4]  K. Nakano,et al.  Development of a new total reflection X‐ray fluorescence instrument using polycapillary X‐ray lens , 2006 .

[5]  Dariush Hampai,et al.  XRF-XANES characterization of deep ice core insoluble dust , 2012 .

[6]  J. Jouzel,et al.  Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica , 1999, Nature.

[7]  V. Maggi.  Mineralogy of atmospheric microparticles deposited along the Greenland Ice Core Project ice core , 1997 .

[8]  A. Marcelli,et al.  Research and Development of X‐Ray Spectroscopy Based on Polycapillary Optics at Laboratori Nazionali di Frascati , 2010 .

[9]  Carlo Barbante,et al.  Eight glacial cycles from an Antarctic ice core , 2004, Nature.

[10]  B. Delmonte,et al.  Defining the geochemical composition of the EPICA Dome C ice core dust during the last glacial‐interglacial cycle , 2008 .

[11]  D. Hampai,et al.  X-ray micro-imaging by capillary optics☆ , 2009 .

[12]  A. Marcelli,et al.  First combined total reflection X-ray fluorescence and grazing incidence X-ray absorption spectroscopy characterization of aeolian dust archived in Antarctica and Alpine deep ice cores ☆ , 2008 .

[13]  D. Hampai,et al.  Elemental mapping and microimaging by x-ray capillary optics. , 2008, Optics letters.