Use of ETAAS, FAAS and ICP-OES for production and post-certification monitoring of a multielemental certified reference material according to national regulation limits for elements in drinking water

Uribe, Christian; Carrasco, Elmer; Acco, Steve

doi:10.1007/s00769-017-1258-8

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…It is recommended to test homogeneity in term of the certified properties. As the proposed CRMs in the current study will be certified for some macro-, micro- and trace elements, inductively coupled plasma-mass spectrometry (ICP-MS) and instrumentation neutron activation analysis (INAA) are recommended as the most reliable and precise techniques for elemental analysis [3, 4]. However, ICP-MS requires critical sample treatment procedures while INAA is expensive technique and requires critical precautions for safety.…”

Section: Introductionmentioning

confidence: 99%

Between-bottle homogeneity test of new certified reference materials employing wavelength dispersive X-ray fluorescence spectrometry

Idris

2019

BMC Chemistry

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Background A pilot study has being carried out at our laboratories, with international collaborators, to develop seven certified reference materials (CRMs), which have matrices of mainly soil and biological tissues. The CRMs will be certified for macro-, micro- and trace elements for environmental, toxicological, agronomic and nutritional purposes. Homogeneity of element concentrations is a critical step in the production process of CRMs. This work employs wavelength dispersive X-ray fluorescence spectrometry (WD-XRF) to test between-bottle homogeneity of the CRMs. Results The relative standard deviation (RSD), relative average deviation, Skewness and Kurtosis of element contents in seven bottles out of 80 bottles of each CRM were considered to assess homogeneity in terms of variability and distribution. More than 50% of the number of quantified elements recorded RSD between 2 and 5%. Hence, based on an in-house classification, the intended CRMs recorded excellent to good between-bottle homogeneity. Nevertheless, the contents of some elements (Ni, Rb, Zn and Br) experienced high RSD values (> 10%). The Skewness and Kurtosis values of most elements are around one indicating symmetric distribution and thus have an absence of tailing relative to the normal distribution. Conclusions WD-XRF provides fit for purpose data for assessment of initial between-bottle homogeneity in terms of rapidity, ease of use, multi-element quantification and sample non-destruction. Electronic supplementary material The online version of this article (10.1186/s13065-019-0528-4) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Between-bottle homogeneity test of new certified reference materials employing wavelength dispersive X-ray fluorescence spectrometry

Idris

2019

BMC Chemistry

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“…El estudio de estabilidad pretende determinar el tiempo de vida útil y los efectos asociados a la posible exposición del material en condiciones extremas, lo cual puede ocurrir en un proceso de transporte [14]. La caracterización del material de referencia es el proceso de medición de las propiedades a certificar y, finalmente, la asignación del valor es la etapa que permite obtener el valor de la propiedad [15,16].…”

Section: Introductionunclassified

Desarrollo de un material de referencia certificado para análisis elemental de agua potable

et al. 2019

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La producción de un material de referencia (MR) es un proceso en el que se realizan estudios relacionados con la preparación, envasado y caracterización (incluye homogeneidad y estabilidad). En este trabajo se presentan los resultados del desarrollo de un MR de agua potable. El envasado se realiza aplicando dos procedimientos (envasado convencional e inmersión). La caracterización se realizó por Absorción Atómica, ICPMS y Cromatografía iónica. La evaluación de homogeneidad del material se realizó para Na, Mg, Ca, Fe, K, Co, Pb, Mo, As, Ni, Se, Cu, Al, Cr Zn y aniones como NO3-y Cl-. La estabilidad se evaluó a corto (condiciones aceleradas) y largo plazo por ICPMS y CI, además se realizó seguimiento gravimétrico. La homogeneidad y estabilidad se evaluaron con base en su incertidumbre. La incertidumbre asociada a la homogeneidad y estabilidad MR evidenció resultados aceptables para la mayoría de los analitos. Los resultados del seguimiento gravimétrico permitieron detectar pérdidas de masa del material, por lo que se planteó un nuevo esquema para evaluar la estabilidad a través de métodos gravimétricos. Finalmente, se encontró que el MR presenta incertidumbres expandidas entre el 0,93% y el 4,38%, siendo apto para el uso previsto.

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Indicative properties measurements by SEM, SEM-EDX and XRD for initial homogeneity tests of new certified reference materials

Idris

El‐Zahhar

2019

Microchemical Journal

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Use of ETAAS, FAAS and ICP-OES for production and post-certification monitoring of a multielemental certified reference material according to national regulation limits for elements in drinking water

Cited by 6 publications

References 3 publications

Between-bottle homogeneity test of new certified reference materials employing wavelength dispersive X-ray fluorescence spectrometry

Between-bottle homogeneity test of new certified reference materials employing wavelength dispersive X-ray fluorescence spectrometry

Desarrollo de un material de referencia certificado para análisis elemental de agua potable

Indicative properties measurements by SEM, SEM-EDX and XRD for initial homogeneity tests of new certified reference materials

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