Synchrotron radiation X‐Ray fluorescence at the LNLS: beamline instrumentation and experiments

Pérez, Carlos Antonio Flores; Radtke, Martin; Sánchez, Héctor J.; Tolentino, H.; Neuenshwander, Regis T.; Barg, William; Rubio, Marcelo; Bueno, Maria Izabel M. S.; Raimundo, Ivo M.; Rohwedder, Jarbas José R.

doi:10.1002/(sici)1097-4539(199909/10)28:5<320::aid-xrs359>3.3.co;2-t

Cited by 59 publications

(87 citation statements)

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“…This method detects the multielementar chemical composition (Z>14), at trace and ultra-trace levels (Pérez et al 1999). Composed samples were prepared from tissues of three to five individuals from size ranging between 170 and 240 mm and that each sample was analyzed in triplicates.…”

Section: Methodsmentioning

confidence: 99%

Heavy Metal in Tissues of Three Fish Species from Different Trophic Levels in a Tropical Brazilian River

Terra

Araújo

Calza

et al. 2007

Water Air Soil Pollut

115

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The Paraíba do Sul river is located in one of the most developed part of Brazil and receives many organic and industrial effluents directly affecting the ichthyofauna. Concentration of four heavy metals (Cu, Cr, Zn and Pb) were determined in two tissues (muscle and gonads) of three abundant fish species from different trophic levels (Oligosarcus hepsetus-carnivore, Geophagus brasiliensis-omnivore and Hypostomus luetkeni-detritivore) between November 2002 and April 2003. The aim was to test the hypothesis that the trophic level and the proximity from impacted areas influence levels of contamination and to assess if these species are indicators of large-scale habitat quality. Levels of heavy metals were detected by Total Reflection X-ray Fluorescence with Synchrotron Radiation (SR-TXRF) at the Brazilian National Synchrotron Radiation Laboratory (LNLS). Generally, gonads showed higher metal concentration than muscles, except for Cr. All examined metals, but Cu, exceeded the maximum permitted concentration (mpc) by the Brazilian legislation for human consumption in at least one tissue. O. hepsetus (carnivore) showed the highest contamination levels, followed by G. brasiliensis (omnivore) and H. luetkeni (detritivore). The middleupper segment, which encompasses large urban areas, showed the highest levels of metal contamination in most cases. O. hepsetus showed the highest levels of contamination in muscles for Pb in the middle-upper river segment (7.98±3.73; mpc=2.0 μg g −1 ) and for Cr in the upper (5.53±0.05; mpc=0.10 μg g −1 ) and middle-upper (4.20±0.85; mpc=0.10 μg g −1 ) segments, which indicates that human population should avoid to consume these fishes species from these segments of the Paraíba do Sul river.

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Section: Methodsmentioning

confidence: 99%

Heavy Metal in Tissues of Three Fish Species from Different Trophic Levels in a Tropical Brazilian River

Terra

Araújo

Calza

et al. 2007

Water Air Soil Pollut

115

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“…The experiment was conducted using the X-ray fluorescence beam line at the Laborato´rio Nacional de Luz S! ıncrotron (LNLS), Campinas, Brazil (Pe´rez et al, 1999). The samples were placed at 45 to the incident beam.…”

Section: Methodsmentioning

confidence: 99%

A preliminary study of the distribution of trace elements in healthy and neoplastic breast tissues with synchrotron radiation X-ray fluorescence

Poletti

Gonçalves

Pérez

et al. 2004

Radiation Physics and Chemistry

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“…The SR-TXRF measurements were carried out using a polychromatic X-ray beam, with beam energy from 2 up to 20 keV, from the D09-XRF beam-line, at the Brazilian Light Synchrotron Laboratory (LNLS) (Pérez et al 1998). Each reflector disk containing the evaporation-residual sample was positioned for the X-ray total reflection condition and the acquisition time was set up at 100 s. A HP-Ge detector, with 160 eV FWHM@Mn-Ka line, was used for X-ray detection.…”

Section: Metal Analysismentioning

confidence: 99%

Chromium ions phytoaccumulation by three floating aquatic macrophytes from a nutrient medium

Espinoza‐Quiñones

Silva

Rizzutto

et al. 2008

World J Microbiol Biotechnol

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In the present work, the trivalent and hexavalent chromium phytoaccumulation by three living free floating aquatic macrophytes Salvinia auriculata, Pistia stratiotes, and Eicchornia crassipes was investigated in greenhouse. These plants were grown in hydroponic solutions supplied with non-toxic Cr 3? and Cr 6? chromium concentrations, performing six collections of nutrient media and plants in time from a batch system. The total chromium concentrations into Cr-doped hydroponic media and dry roots and aerial parts were assayed, by using the Synchrotron radiation X-ray fluorescence technique. The aquatic plant-based chromium removal data were described by using a nonstructural kinetic model, obtaining different bioaccumulation rate, ranging from 0.015 to 0.837 l mg -1 d -1 . The Cr 3? removal efficiency was about 90%, 50%, and 90% for the E. crassipes, P. stratiotes, and S. auriculata, respectively; while it was rather different for Cr 6? one, with values about 50%, 70%, and 90% for the E. crassipes, P. stratiotes, and S. auriculata.

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Synchrotron radiation X‐Ray fluorescence at the LNLS: beamline instrumentation and experiments

Cited by 59 publications

References 0 publications

Heavy Metal in Tissues of Three Fish Species from Different Trophic Levels in a Tropical Brazilian River

Heavy Metal in Tissues of Three Fish Species from Different Trophic Levels in a Tropical Brazilian River

A preliminary study of the distribution of trace elements in healthy and neoplastic breast tissues with synchrotron radiation X-ray fluorescence

Chromium ions phytoaccumulation by three floating aquatic macrophytes from a nutrient medium

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