Determination of trace elements in planktonic microcrustaceans using total reflection X-ray fluorescence (TXRF): First results from two Chilean lakes

Woelfl, Stefan; Mages, Margarete; Mercado, Susana M.; Villalobos, Lorena; Óvári, Mihály; Encina, Francisco

doi:10.1007/s00216-003-2273-7

Cited by 14 publications

(3 citation statements)

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“…TXRF quantication (Total Reection, X-ray Fluorescence) is a suitable technique for the analysis of heavy metals in plankton, and it is able to determine the level of elements in the range of 10 À4 -10 À5 g g À1 . 23 Knowing that in Antarctic seawater concentrations of dissolved metals are in the range of 10 À12 g ml À1 , and that concentrations of trace elements in the particulate phase are typically 10 À6 -10 À7 g g À1 dry weight, 24,25 the sensitivity of the TXRF technique is probably insufficient to determine trace elements in phytoplankton living in Antarctic seawaters.…”

Section: Introductionmentioning

confidence: 99%

Separation of micro-phytoplankton from inorganic particulate in Antarctic seawater (Ross Sea) for the determination of Cd, Pb and Cu: optimization of the analytical methodology

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Separation of micro-phytoplankton from inorganic particulate in Antarctic seawater (Ross Sea) for the determination of Cd, Pb and Cu: optimization of the analytical methodology

et al. 2015

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“…The elements evaluated were K, Ca, Cr, Mn, Fe, Ni, Cu, Zn, As and Sr with masses of the sample between 10 and 500 μg and DL of only some ppb. Woelfl et al [ 77 ] applied TXRF to the study of trace metals in planktonic microcrustacean. The mass of sample evaluated was lower to 50 μg, and the elements Mn, Fe, Ni.…”

Section: Bioanalytical Applicationmentioning

confidence: 99%

TXRF spectrometry in the bioanalytical sciences: A brief review

Fernández-Ruiz

2021

X-Ray Spectrometry

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Funding informationUniversidad Aut onoma de Madrid This work describes the basic principles of Total-reflection X-Ray Fluorescence (TXRF) spectrometry and some of its most outstanding applications for investigating metal traces, mainly in biological and biomedical samples. TXRF is an analytical technique that combines the versatility of elemental analysis by X-ray energy dispersion with a low detection limit in the order of picograms of absolute mass or a few ppb (μg L À1 ) as concentration. The microanalytical capacity of TXRF allows the study of small sample quantities. The TXRF can perform qualitative and mass ratio analyses of the elements present in a sample of only a few hundred nanograms. These properties are of great importance in the research of metal traces in biological systems, as they allow fast, precise, and accurate characterisation of the elemental fingerprint at trace level. Its successful application in studies of the coordination kinetics of new platinumbased antitumor drugs with DNA, its application in the study profile of the metal in healthy and cancerous human tissues, or even its application in the study of the processes of metal diffusion through cell membranes are just a few examples of TXRF capabilities in the biomedical sciences. This brief review's main objective is to provide an overview of the physical principles and possibilities of TXRF spectrometry. It also highlights some of the most outstanding applications that have been developed so far, mainly in the biological field, so that the reader can evaluate their potential applications.

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“…145 Zn was also found to be enriched into the biofilm by a factor of 10 000 compared with the water phase. Woelfl et al 146 investigated planktonic microcrustaceans from two Chilean lakes with TXRF and found these microorganisms to be valuable bioaccumulators. The benefits of a portable TXRF system were reported by Mages et al 147 who used one during field campaigns for the screening of freshwater samples.…”

Section: Applicationsmentioning

confidence: 99%