Possibilities and limitations of the total reflection X-ray fluorescence spectrometry for the determination of low Z elements in biological samples

Polgári, Zsófia; Szoboszlai, Norbert; Óvári, Mihály; Záray, Gyula

doi:10.1016/j.microc.2011.06.002

Cited by 19 publications

(11 citation statements)

References 18 publications

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“…However, for fluorine, the fluorescence yield and the absorption of radiation in the beam pathway is very low and consequently poor LODs (about 120 μg g −1 ) are obtained [170,171]. To overcome these drawbacks, the TXRF spectrometer should be equipped with primary X-ray that increase the fluorescence yield for fluorine determination [170].…”

Section: Neutron Activation Analysismentioning

confidence: 99%

“…TXRF has been widely used for analysis of biological samples [171], and mainly chlorine and bromine can be determined in blood, plasma, serum, and plant material. On the other hand, works using TXRF to determine iodine are scarce in the literature [75], and some approaches are required to minimize interferences when biological samples are being analyzed, such as acidic microwave digestion and slurry sampling [167,172].…”

Section: Neutron Activation Analysismentioning

confidence: 99%

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Analytical methods for the determination of halogens in bioanalytical sciences: a review

et al. 2013

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Fluorine, chlorine, bromine, and iodine have been studied in biological samples and other related matrices owing to the need to understand the biochemical effects in living organisms. In this review, the works published in last 20 years are covered, and the main topics related to sample preparation methods and analytical techniques commonly used for fluorine, chlorine, bromine, and iodine determination in biological samples, food, drugs, and plants used as food or with medical applications are discussed. The commonest sample preparation methods, as extraction and decomposition using combustion and pyrohydrolysis, are reviewed, as well as spectrometric and electroanalytical techniques, spectrophotometry, total reflection X-ray fluorescence, neutron activation analysis, and separation systems using chromatography and electrophoresis. On this aspect, the main analytical challenges and drawbacks are highlighted. A discussion related to the availability of certified reference materials for evaluation of accuracy is also included, as well as a discussion of the official methods used as references for the determination of halogens in the samples covered in this review.

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Section: Neutron Activation Analysismentioning

confidence: 99%

Section: Neutron Activation Analysismentioning

confidence: 99%

Analytical methods for the determination of halogens in bioanalytical sciences: a review

et al. 2013

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“…The reagents used were 2.5 mL HNO 3 , 0.5 mL HCl and 7 mL H 2 O. The recommended conditions for microwave digestion of our were reported by Ren et al 33 Polgari et al 34 compared 'normalvolume' microwave digestion, digestion using micro vessels and vapour-phase digestion. The normal-volume approach afforded better destruction of organic matrix and dilution of inorganic residue but higher LODs compared with the other procedures due to the greater dilution factors.…”

Section: Digestion Extraction and Preconcentrationmentioning

confidence: 99%

Atomic spectrometry update. Clinical and biological materials, foods and beverages

Taylor

Branch

Day

et al. 2010

J. Anal. At. Spectrom.

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“…As a consequence, the obtained signal is lower than expected. [19] As described earlier, the determination of Si as reference is necessary for the evaluation of the efficiency of the continuous extraction. In the slag obtained from copper smelters, Si is present as silicate (Fayalite).…”

Section: Introductionmentioning

confidence: 99%

Determination of residual metal concentration in metallurgical slag after acid extraction using total reflection X‐ray fluorescence spectrometry

et al. 2014

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Total reflection X-ray fluorescence spectrometry (TXRF) was used to determine residual metal content in metallurgical slag after sulfuric acid extraction. A slag sample provided by a copper smelter industry and submitted to a recycling process with the aim of extracting valuable metals was analyzed. Slurry sampling was evaluated as a simple sample preparation procedure for the determination of major (Si, Fe, K, Ca) and trace elements (Ti, Ni, Cu, Zn, As, Pb, Sr, Rb, Mn) in two certified reference materials (lake and river sediments) to evaluate the accuracy of the procedure. Precision was evaluated as relative standard deviation (%) of three replicates, being usually lower than 10%. Detection limits were in the range of 1.1-1079 μg g À1 . Additionally, it was evaluated to use Sia major component of the slagas intrinsic reference to determine residual elements in the slag residues. A two-element internal standard (Ga + P) was employed to determine all the elements. Ga was used as internal standard for the determination of elements from K to Pb, and P was required for the quantification of Si. The optimal procedure of slurry sampling was applied for the analysis of the original metallurgical slag and the solid residues. It was found that As and Pb are accumulated in the slag, whereas Cu, Zn, and Fe are extracted to a percentage >90% from the slag. This was confirmed by analysis of the sulfuric acid extracts of the metallurgical slag.

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Possibilities and limitations of the total reflection X-ray fluorescence spectrometry for the determination of low Z elements in biological samples

Cited by 19 publications

References 18 publications

Analytical methods for the determination of halogens in bioanalytical sciences: a review

Analytical methods for the determination of halogens in bioanalytical sciences: a review

Atomic spectrometry update. Clinical and biological materials, foods and beverages

Determination of residual metal concentration in metallurgical slag after acid extraction using total reflection X‐ray fluorescence spectrometry

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