First Total Reflection X-Ray Fluorescence round-robin test of water samples: Preliminary results

Borgese, Laura; Bilo, Fabjola; Tsuji, Kouichi; Fernández-Ruiz, Ramón; Marguí, Eva; Streli, Christina; Pepponi, G.; Stosnach, Hagen; Yamada, Takashi; Vandenabeele, Peter; Maina, D. M.; Gatari, Michael; Shepherd, Keith D.; Towett, Erick K.; Bennun, Leonardo; Custo, Graciela; Vásquez, Cristina; Depero, Laura E.

doi:10.1016/j.sab.2014.06.024

Cited by 32 publications

(20 citation statements)

References 19 publications

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“…In a previous work [10] the variations for multiple measurements were explained by differences in internal standard concentrations. Table 2 Mathematical model of the measurement procedure.…”

Section: Depositional Repeatabilitymentioning

confidence: 99%

“…To ensure the validation of the data interpretation in environmental analyses, the performance and 'fit-for-purpose' of the method should be demonstrated and sufficient information should be provided about the followed methodology [7][8][9][10]. The international standard ISO/IEC 17025 states that the performance of a measurement procedure should be evaluated based on one or a combination of the following approaches: a) the use of reference materials, b) the comparison of results achieved with other methods, c) inter-laboratory comparison, d) systematic assessments of the factors influencing the result and e) the assessment of the uncertainty of the results [11].…”

Section: Introductionmentioning

confidence: 99%

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Measurement uncertainty in Total Reflection X-ray Fluorescence

Floor

Queralt

Hidalgo

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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Section: Depositional Repeatabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement uncertainty in Total Reflection X-ray Fluorescence

Floor

Queralt

Hidalgo

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…A summary of water, air dust, organ tissue and plant material analysis is shown in [ 27 ]. Borgese et al ran the round-robin test of water samples [ 28 ], while Pashkova et al discussed the effect of factors such as the surface density of dried water residue on the sample carrier, the dilution ratio of high-mineralized samples with ultrapure water, the salt content, and the internal standard concentration, in water sample analysis [ 29 ]. Environmental and food samples have been especially widely tested, including rainwater [ 30 ], tree-rings [ 31 ], fine roots of Scots pine [ 32 ], industrial wastewater [ 33 ], water samples during deionized water production [ 34 ], metallurgical slag [ 35 ], heavy metal contaminated soils and sediments [ 36 ], Langmuir monolayers on water surface [ 37 ], Madeira wine [ 38 ], and honey from different regions [ 39 ].…”

Section: Related Workmentioning

confidence: 99%

Intelligent Simultaneous Quantitative Online Analysis of Environmental Trace Heavy Metals with Total-Reflection X-Ray Fluorescence

Wang

Yang

et al. 2015

Sensors

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Total-reflection X-ray fluorescence (TXRF) has achieved remarkable success with the advantages of simultaneous multi-element analysis capability, decreased background noise, no matrix effects, wide dynamic range, ease of operation, and potential of trace analysis. Simultaneous quantitative online analysis of trace heavy metals is urgently required by dynamic environmental monitoring and management, and TXRF has potential in this application domain. However, it calls for an online analysis scheme based on TXRF as well as a robust and rapid quantification method, which have not been well explored yet. Besides, spectral overlapping and background effects may lead to loss of accuracy or even faulty results during practical quantitative TXRF analysis. This paper proposes an intelligent, multi-element quantification method according to the established online TXRF analysis platform. In the intelligent quantification method, collected characteristic curves of all existing elements and a pre-estimated background curve in the whole spectrum scope are used to approximate the measured spectrum. A novel hybrid algorithm, PSO-RBFN-SA, is designed to solve the curve-fitting problem, with offline global optimization and fast online computing. Experimental results verify that simultaneous quantification of trace heavy metals, including Cr, Mn, Fe, Co, Ni, Cu and Zn, is realized on the online TXRF analysis platform, and both high measurement precision and computational efficiency are obtained.

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“…Over several years, total reflection X‐ray fluorescence (TXRF) spectroscopy has become known as a versatile tool for elemental analysis across many application fields . TXRF is an advanced technique for surface chemical analysis which, within ISO, was originally applied to measure and control the contamination of silicon wafers to support the semiconductor industry .…”

Section: Introductionmentioning

confidence: 99%

Summary of ISO standard 20289: Total reflection X‐ray fluorescence analysis of water

Borgese

Bilo

Federici

et al. 2019

Surface & Interface Analysis

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The International Standard Organization (ISO) 20289 provides a method for determining the elemental concentration of impurities dissolved in water samples. It exploits total reflection X-ray fluorescence (TXRF) spectroscopy to measure a dried residue on an X-ray reflector. The scope is to provide a chemical metrology for quantitative analysis to obtain traceable results within a defined degree of accuracy and precision according to good practice and in compliance with ISO 17025. Target users include technicians working in laboratories who perform routine analysis of large numbers of samples. The method is specifically focused on determining elements dissolved in drinking, surface and ground water, but it can be also extended to waste waters and eluates if dilution steps are considered. The standard includes the description of all reagents, standards, and materials, including suitable reference materials, which are needed to prepare the sample and ensure quality assurance and control protocols. In addition, the standard presents a detailed description of sample preparation, contributions factors affecting the uncertainty budget, the general procedure to check instrumental calibration, determining limits of detection and quantification, and methods for spectra fitting.

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First Total Reflection X-Ray Fluorescence round-robin test of water samples: Preliminary results

Cited by 32 publications

References 19 publications

Measurement uncertainty in Total Reflection X-ray Fluorescence

Measurement uncertainty in Total Reflection X-ray Fluorescence

Intelligent Simultaneous Quantitative Online Analysis of Environmental Trace Heavy Metals with Total-Reflection X-Ray Fluorescence

Summary of ISO standard 20289: Total reflection X‐ray fluorescence analysis of water

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