Evaluation of uncertainty in the energy dispersive X-ray fluorescence determination of platinum in alumina

Devi, Pooja; Trupti, A. C.; Nicy, A.; Dalvi, Aditi A.; Swain, K. K.; Wagh, D. N.; Verma, Rakesh Kumar

doi:10.1039/c5ay00547g

Cited by 22 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Detection limit of EDXRF spectrometry for Hg in the present studies was found to be 22 ng, as calculated from the blank, i.e. background counts in the region of interest . The detection limit of Hg is 2 ng ml −1 for the CVAAS technique .…”

Section: Resultsmentioning

confidence: 42%

Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

et al. 2016

Self Cite

View full text Add to dashboard Cite

Hg(II) was sorbed on polyaniline from aqueous solutions, followed by determination using energy dispersive X-ray fluorescence spectrometry. Distribution coefficient of Hg(II) on polyaniline was about 4 × 10 3 in water, whereas distribution coefficient was 1.2 × 10 4 at 0.1 M HCl and decreased drastically with increase in HCl concentration. Rapid kinetics of sorption was evinced by the 80% uptake within the initial 1 min and quantitative sorption within 5 min of equilibration. The sorption was found to follow Langmuir isotherm model, and the Langmuir capacity was calculated as 19.7 mg g À1. The ability of polyaniline to form stable and homogeneous pellets facilitated the energy dispersive X-ray fluorescence determination without recourse to elution. Detection limit of Hg was found to be 22 ng, considering 100 mg pellet of polyaniline. The apparent detection limit was 6 pg, as the preconcentration factor of Hg(II) on polyaniline was 4 × 10 3 . The developed method is at par with the established method for mercury determination, namely, cold vapor atomic absorption spectrometry. Accuracy of the method was established by the analysis of the International Atomic Energy Agency reference materials, namely, hair and lichen, for Hg(II).

show abstract

Section: Resultsmentioning

confidence: 42%

Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…These characteristics can be summarized in terms of the effective sample thickness, calculated based on the mass attenuation coefficients of each component element and the mass thickness of the samples. Depending on the effective mass attenuation coefficients, samples are divided into three categories, namely, thin, thick, and intermediate thickness, which, in turn, decides the quantification methodology in EDXRF measurements …”

Section: Resultsmentioning

confidence: 99%

“…Depending on the effective mass attenuation coefficients, samples are divided into three categories, namely, thin, thick, and intermediate thickness, which, in turn, decides the quantification methodology in EDXRF measurements. [19,20] The calibration standards for the present studies were evaluated for their thickness characteristics, considering the mass attenuation coefficients and weight fractions of each element as per the proportion of the constituents, namely, the Fe 2 O 3 standard and cellulose. The effective thicknesses were calculated for a combination of 12-keV source X-rays and 6.4-keV characteristic X-rays.…”

Section: Assessment Of Calibration Standards For Quantification Of mentioning

confidence: 99%

Energy dispersive X‐ray fluorescence determination of Fe in solid powder samples: A quality improvement perspective

et al. 2019

View full text Add to dashboard Cite

The various factors affecting energy dispersive X-ray fluorescence determination of iron in solid powder samples were evaluated, to improve the quality of these measurements. Influence of samples/standards preparation and instrumental parameters such as applied voltage to the X-ray tube, tube output current, and duration of acquisition were assessed, and the optimized instrumental parameters were 12 kV, 200 μA, and 200 s, respectively. Linear dynamic range of the spectrometer was found to be 0.0052 to 5.042 g kg −1 . Detection limits of iron in various organic/inorganic samples were found to be 2.5 to 21.9 mg kg −1 . The values obtained during the present method were evaluated with neutron activation analysis.

show abstract

“…The paper argues that the bottom-up method for MU estimation is feeble as long as the sensitivity coefficients of the uncertainty budget factor are not well known and documented, which is the habitual case of the ED and WD XRFS bottom-up published methods [22][23][24][25][26][27][28][29].…”

Section: Discussionmentioning

confidence: 99%

“…In the literature one can found a lot of modelling approaches for ED-XRFS and WD-XRFS [22][23][24][25][26][27][28][29].…”

mentioning

confidence: 99%

A New Robust Top-Down Method for Measurement Uncertainty Estimation of the ED(P)- XRFS Outcomes Carried on a Fluorescence Glass

Pencea¹,

Brânzei²,

Cojocaru³

et al. 2018

Rev. Chim.

View full text Add to dashboard Cite

The rare earths doped glasses have been considered as the best solution to fulfil the increasing demand for cheaper fluorescent taggants. The ensuring a high quality of a spectral taggant batch imposes, among others, an exact chemical composition measurement. The most convenient method for elemental analysis of powdered specimens is Energy Dispersive (Polarised)- X-ray Fluorescence Spectroscopy (ED(P)-XRFS) because it has many advantages: non-destructive, large analytical range, robustness, easy sample preparation, cheaper consumables, less time consuming etc. ED(P)-XRFS has some inherent analytical drawbacks such as: interelements interferences, matrix dependence etc. The only way to overcome the drawbacks is a proper method for the measurement uncertainty (MU) estimation of the outcomes. Consequently, the paper argues that the bottom-up method for MU estimation is feeble as long as the sensitivity coefficients of the factors of uncertainty budget are not well known and documented, which is the habitual case of the ED and WD XRFS bottom-up published methods. The paper substantiates a new robust top-down method for MU estimation of the ED(P)-XRFS outcomes carried on a fluorescence glass. Also, the paper presents a representative case study of appliance of the developed top-down method. The other novelties addressed in the paper are: i. Introducing the robust statistics as further checks for the accuracy of mean and of standard deviation, according to ISO 13583:2015; ii. A new criterion for testing the normal distribution of the mean of a set of fewer outcomes based on Central Limit Theorem and on the central momentum of third orde; iii. The method was implemented for multiple simultaneous outcomes. The top-down method, given in the paper, can be applied to ED- and WD-XRFS routine measurements in industrial laboratories or in material science ones, but it can be adapted, without much effort, to other types of tests e.g. hardness, XRD etc.

show abstract

Evaluation of uncertainty in the energy dispersive X-ray fluorescence determination of platinum in alumina

Cited by 22 publications

References 24 publications

Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

Preconcentration of mercury on polyaniline expands the horizon for energy dispersive X‐ray fluorescence determination

Energy dispersive X‐ray fluorescence determination of Fe in solid powder samples: A quality improvement perspective

A New Robust Top-Down Method for Measurement Uncertainty Estimation of the ED(P)- XRFS Outcomes Carried on a Fluorescence Glass

Contact Info

Product

Resources

About