Atomic Spectrometry Update. X-ray fluorescence spectrometry

Potts, Philip J.; Ellis, Andrew T.; Kregsamer, P.; Marshall, John; Streli, Christina; MWest, Margaret; Wobrauschek, P.

doi:10.1039/b106821k

Cited by 30 publications

(14 citation statements)

References 303 publications

(323 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A more remarkable feature is revealed in the sample heat treated at (400 °C), whose Kα Ti line slightly shifted towards higher energy with ΔnormalEF by ≈10 eV, and could be linked to a dominant presence of structural defects at the particle surface [33].…”

Section: Resultsmentioning

confidence: 99%

Controlled Synthesis and Microstructural Properties of Sol-Gel TiO2 Nanoparticles for Photocatalytic Cement Composites

et al. 2018

View full text Add to dashboard Cite

Titania nanoparticles are intensely studied for photodegradation applications. Control of nanoscale morphology and microstructural properties of these materials is critical for photocatalytic performance. Uniform anatase-type TiO2 nanoparticles were prepared by the sol-gel process using titanium isopropoxide as precursor. Controlled annealing up to 400 °C established crystallization and particle size ranging between 20 and 30 nm. Detailed thermal examination reveals that anatase phase transformation into rutile is affected by the annealing temperature and by the initial particle size. The anatase to rutile phase transformation occurs in the nanoparticles at 550 °C. The Total Reflection X-ray Fluorescence (TXRF) study of the anatase nanoparticles shows a shift towards higher energy in the Ka Ti line of 10 eV, related to structural defects. These features were discussed in the photocatalytic behavior of several cement-based materials modified with the so-prepared anatase nanoparticles. The photocatalytic activity of the anatase-type TiO2/cement mortar system is evaluated from the degradation of Methylene Blue (MB) under UV irradiation, monitored through the absorbance at 665 nm. The results show that the photocatalytic composites exhibit up to 76.6% degradation efficiency. Mechanical testing of the nano-TiO2 modified cementitious composites evinces a moderate reinforcement of the strength properties at long ages.

show abstract

Section: Resultsmentioning

confidence: 99%

Controlled Synthesis and Microstructural Properties of Sol-Gel TiO2 Nanoparticles for Photocatalytic Cement Composites

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The performance of the portable XRF instrumentation in the laboratory has already been reported (Potts et al 1995(Potts et al , 2001. Here, a wide range of silicate rock reference materials were analysed as powder pellets to evaluate accuracy, precision and detection limits.…”

Section: The Ed-xrf Analysermentioning

confidence: 99%

Multivariate Mixture of Normals With Unknown Number of Components: An Application to Cluster Neolithic Ceramics From Aegean and Asia Minor Using Portable Xrf*

Papageorgiou

Liritzis

2007

Archaeometry

View full text Add to dashboard Cite

Multivariate techniques and especially cluster analysis have been commonly used in Archaeometry. Exploratory and model-based techniques of clustering have been applied in geochemical (continuous) data of archaeological artifacts for provenance studies. Model-based clustering techniques like classification maximum-likelihood and mixture maximum likelihood had been used in a lesser extent in this context and although they seem to be suitable for such data, they either present practical difficulties-like high dimensionality of the data-or their performance give no evidence to support that they prevail on the standard methods (Papageorgiou et al., 2001). In this paper standard statistical methods (hierarchical clustering, principal components analysis) and the recently developed one of the multivariate mixture of normals with unknown number of components (see Dellaportas and Papageorgiou, 2005) in the category of the model-based ones, are applied and compared. The data set comprises of chemical compositions in 188 ceramic samples derived from the Aegean islands and surrounding areas.

show abstract

“…In this method, glass beads are made by melting powdered samples mixed with a borate flux as a fusing agent. 26,27 A borate flux can dissolve silicates, carbonates, oxides, and sulfates in a short time. Thus, sample decomposition can be accomplished easily and rapidly as well as safely by an HF-free method by using an automated machine.…”

Section: Introductionmentioning

confidence: 99%

Rapid Purification of Alkali and Alkaline-earth Elements for Isotope Analysis (δ7Li, δ26Mg, 87Sr/86Sr, and δ88Sr) of Rock Samples Using Borate Fusion Followed by Ion Chromatography with a Fraction Collector System

Araoka

Yoshimura

2019

ANAL. SCI.

View full text Add to dashboard Cite

For the rapid, easy, and safe purification of alkali and alkaline-earth elements from rock samples for stable isotope analysis, we developed a semi-automated, high-throughput procedure using borate fusion and an ion chromatography system equipped with a fraction collector. This HF-free procedure for the decomposition of silicate rock samples can be performed in a short time without isotope fractionation; the purification procedure enables the collection of baselineseparated peaks of multiple target elements and the complete removal of interference matrices from reagents and samples. The accuracy of this procedure was verified by confirming the correspondence of stable isotopic values of Li, Mg, Sr (δ 7 Li, δ 26 Mg, δ 88 Sr) and radiogenic isotopic values of Sr (87 Sr/ 86 Sr) to previously reported values in various geochemical reference materials in which the concentration range of Li was 7.78-86.6 ng g-1 , that of Mg was 0.02-26.9%, and that of Sr was 178-7240 ng g-1. These results demonstrate that this procedure, which allows for the concurrent multiisotope analysis of alkali and alkaline-earth elements in the same sample, is applicable to a wide variety of sample types.

show abstract

Atomic Spectrometry Update. X-ray fluorescence spectrometry

Cited by 30 publications

References 303 publications

Controlled Synthesis and Microstructural Properties of Sol-Gel TiO2 Nanoparticles for Photocatalytic Cement Composites

Controlled Synthesis and Microstructural Properties of Sol-Gel TiO2 Nanoparticles for Photocatalytic Cement Composites

Multivariate Mixture of Normals With Unknown Number of Components: An Application to Cluster Neolithic Ceramics From Aegean and Asia Minor Using Portable Xrf*

Rapid Purification of Alkali and Alkaline-earth Elements for Isotope Analysis (δ7Li, δ26Mg, 87Sr/86Sr, and δ88Sr) of Rock Samples Using Borate Fusion Followed by Ion Chromatography with a Fraction Collector System

Contact Info

Product

Resources

About