The Lund Nuclear Microprobe sub-micron set-up. Part II: Beam line, focusing system and scanning

Shariff, Asad; Auzelyté, Vaida; Elfman, Mikael; Kristiansson, P.; Malmqvist, Klas; Pallon, Jan; Wegdén, Marie

doi:10.1016/j.nimb.2005.01.027

Cited by 30 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, a second set of experiments was conducted, at Lund University Nuclear Microprobe Laboratory, using µ‐particle induced X‐ray emission (µ‐PIXE) to assess the distribution of these macronutrients. This microbeam line (Shariff et al ., 2005; Elfman et al ., 2005) uses a 3 MV single‐ended electrostatic accelerator (NEC), a two‐stage magnetic quadrupole doublet focusing lens system (Oxford OM‐52, Oxford Microbeam OM‐52, Oxford, UK) and an annular eight element Germanium X‐ray array detector (Canberra, Meriden, CT, USA) for PIXE measurements (Shariff et al ., 2004). A proton beam of 2.5 MeV was focused to a spot size of c .…”

Section: Methodsmentioning

confidence: 99%

Speciation and distribution of arsenic and localization of nutrients in rice grains

et al. 2009

Self Cite

View full text Add to dashboard Cite

Summary• Arsenic (As) contamination of rice grains and the generally low concentration of micronutrients in rice have been recognized as a major concern for human health. Here, we investigated the speciation and localization of As and the distribution of (micro)nutrients in rice grains because these are key factors controlling bioavailability of nutrients and contaminants.• Bulk total and speciation analyses using high-pressure liquid chromatography (HPLC)-inductively coupled plasma mass spectrometry (ICP-MS) and X-ray absorption near-edge spectroscopy (XANES) was complemented by spatially resolved microspectroscopic techniques (µ-XANES, µ-X-ray fluorescence (µ-XRF) and particle induced X-ray emission (PIXE)) to investigate both speciation and distribution of As and localization of nutrients in situ.• The distribution of As and micronutrients varied between the various parts of the grains (husk, bran and endosperm) and was characterized by element-specific distribution patterns. The speciation of As in bran and endosperm was dominated by As(III)-thiol complexes.• The results indicate that the translocation from the maternal to filial tissues may be a bottleneck for As accumulation in the grain. Strong similarities between the distribution of iron (Fe), manganese (Mn) and phosphorus (P) and between zinc (Zn) and sulphur (S) may be indicative of complexation mechanisms in rice grains.

show abstract

Section: Methodsmentioning

confidence: 99%

Speciation and distribution of arsenic and localization of nutrients in rice grains

et al. 2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…A scanning beam produces maps of concentrations of selected elements in the sample, over an active area of 50 mm 2 , by the use of the Particle Induced X-ray Emission (PIXE) method. Detailed information about the Lund NMP facility and methods applied was presented by Shariff et al (2005aShariff et al ( , 2005b and Elfman et al (2005). NMP scanning conditions were described by Elfman et al (1999) and Limburg et al (2001).…”

Section: Methodsmentioning

confidence: 99%

Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays

Jarić¹,

Lenhardt²,

Pallon

et al. 2010

Environ Biol Fish

View full text Add to dashboard Cite

Sturgeon populations in the Danube River have experienced severe decline during the last several decades, mostly due to the poorly regulated fishery, river fragmentation and water pollution. This study focuses on gaining better understanding of sturgeon life history primarily by addressing the assessment of microelement accumulation in sturgeon pectoral fin rays, especially of strontium and calcium, as a method that can reveal migration patterns of anadromous sturgeons. Analysis was performed on pectoral fin samples of three anadromous Danube sturgeon species (beluga, Russian sturgeon and stellate sturgeon) by the use of a Nuclear Microprobe technique. The most frequent pattern in analyzed samples was represented by a low Sr:Ca ratio in the innermost annuli, followed by an increased ratio in the middle annuli segment, and often with a decreased ratio in the outermost annuli. Probability density estimate has revealed three distinguished maxima of the Sr:Ca ratio, 7.08×10 −3 , 8.98×10 −3 and 9.90× 10 −3 , which might correspond, respectively, to fresh, brackish and saltwater. Although the analysis of the Sr:Ca ratio in sturgeon pectoral fin rays has revealed changes that might indicate probable migration between habitats with different water salinity, further studies are needed for improvement of this method. This study represents the first analysis of this kind that was conducted on sturgeon species from the Black Sea basin.

show abstract

“…The main features of the facility have been described previously in e.g. [14, 15]. When, as in this case, running the accelerator (which is designed for 3000 keV) at energies below 1000 keV, one section of the machine needs to be electrically shortcut to optimize the ion beam optics and the stability of the accelerator.…”

Section: Methodsmentioning

confidence: 99%

A nuclear geochemical analysis system for boron quantification using a focused ion beam

Nilsson

Kristiansson

Ros

et al. 2016

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Ion beam analysis has for decades been used as a tool for geochemical analysis of trace elements using both X-rays (particle induced X-ray emission) and nuclear reaction analysis. With the geoanalytical setup at the Lund Ion Beam Analysis Facility, the boron content in geological samples with a spatial resolution of 1 µm is determined through nuclear reaction analysis. In the newly upgraded setup, a single detector has been replaced by a double sided silicon strip detector with 2048 segments. After optimization, boron content in geological samples as low as 1 µg g−1 can be measured.

show abstract

The Lund Nuclear Microprobe sub-micron set-up. Part II: Beam line, focusing system and scanning

Cited by 30 publications

References 6 publications

Speciation and distribution of arsenic and localization of nutrients in rice grains

Speciation and distribution of arsenic and localization of nutrients in rice grains

Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays

A nuclear geochemical analysis system for boron quantification using a focused ion beam

Contact Info

Product

Resources

About