Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry

Environmental pollution allows heavy metals to interact with ecosystems, bioaccumulating and passing through the food chain. Animals and humans can consume contaminated species and reach toxic and harmful concentrations in their organisms. While there are international regulatory frameworks for h...

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Autor principal:	David Romero-Estévez, Gabriela S. Yánez-Jácome, Karina Simbaña-Farinango, Pamela Y Vélez-Terreros, Hugo Navarrete
Formato:	article
Lenguaje:	EN ES
Publicado:	Pontificia Universidad Javeriana 2019
Materias:	aoac; cesaq-puce; graphite furnace; heavy metal concentrations; microwave-assisted acid digestion; natural food: validation. Science (General) Q1-390
Acceso en línea:	https://doaj.org/article/57674320845b43de8e480d73f9081f64
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spelling	oai:doaj.org-article:57674320845b43de8e480d73f9081f642021-11-16T17:49:29ZEvaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry10.11144/Javeriana.SC24-3.eots0122-74832027-1352https://doaj.org/article/57674320845b43de8e480d73f9081f642019-11-01T00:00:00Zhttps://revistas.javeriana.edu.co/index.php/scientarium/article/view/22429https://doaj.org/toc/0122-7483https://doaj.org/toc/2027-1352Environmental pollution allows heavy metals to interact with ecosystems, bioaccumulating and passing through the food chain. Animals and humans can consume contaminated species and reach toxic and harmful concentrations in their organisms. While there are international regulatory frameworks for heavy metal contents, these are not always known or suitable for local conditions. This situation calls for the development of locally-applicable analytical methods for the determination of heavy metal concentrations in common vegetal and animal food products. Two established methods (AOAC 999.11, based on sample drying and calcination, and IPN AC-06-00, based on microwave-assisted acid digestion) were comparatively tested at the CESAQ-PUCE laboratory in Quito, Ecuador, to determine their suitability. Sample matrices used were non-industrial, non-organic tomato, lettuce, and beef commonly found in local markets. Heavy metals tested were cadmium, nickel, and lead. Test guidelines and comparative parameters were based on AOAC (2002) and included quantification limits, repeatability variation coefficients, intermediate precision percentages, accuracy and calculated expanded uncertainties. Unlike method AOAC 999.11, method IPN AC-06-00 performance for all parameters was within the range of recommended expected values as per AOAC, and was therefore deemed more suitable to be applied under the local CESAQ-PUCE laboratory conditions. The validation of method IPN AC-06-00 demonstrated its local applicability. In addition, IPN AC-06-00 can be used by similar laboratories to assess contaminants concentrations and improve the baseline information concerning human exposure to toxic metals. David Romero-Estévez, Gabriela S. Yánez-Jácome, Karina Simbaña-Farinango, Pamela Y Vélez-Terreros, Hugo NavarretePontificia Universidad Javerianaarticleaoac; cesaq-puce; graphite furnace; heavy metal concentrations; microwave-assisted acid digestion; natural food: validation.Science (General)Q1-390ENESUniversitas Scientiarum, Vol 24, Iss 3, Pp 497-521 (2019)
institution	DOAJ
collection	DOAJ
language	EN ES
topic	aoac; cesaq-puce; graphite furnace; heavy metal concentrations; microwave-assisted acid digestion; natural food: validation. Science (General) Q1-390
spellingShingle	aoac; cesaq-puce; graphite furnace; heavy metal concentrations; microwave-assisted acid digestion; natural food: validation. Science (General) Q1-390 David Romero-Estévez, Gabriela S. Yánez-Jácome, Karina Simbaña-Farinango, Pamela Y Vélez-Terreros, Hugo Navarrete Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry
description	Environmental pollution allows heavy metals to interact with ecosystems, bioaccumulating and passing through the food chain. Animals and humans can consume contaminated species and reach toxic and harmful concentrations in their organisms. While there are international regulatory frameworks for heavy metal contents, these are not always known or suitable for local conditions. This situation calls for the development of locally-applicable analytical methods for the determination of heavy metal concentrations in common vegetal and animal food products. Two established methods (AOAC 999.11, based on sample drying and calcination, and IPN AC-06-00, based on microwave-assisted acid digestion) were comparatively tested at the CESAQ-PUCE laboratory in Quito, Ecuador, to determine their suitability. Sample matrices used were non-industrial, non-organic tomato, lettuce, and beef commonly found in local markets. Heavy metals tested were cadmium, nickel, and lead. Test guidelines and comparative parameters were based on AOAC (2002) and included quantification limits, repeatability variation coefficients, intermediate precision percentages, accuracy and calculated expanded uncertainties. Unlike method AOAC 999.11, method IPN AC-06-00 performance for all parameters was within the range of recommended expected values as per AOAC, and was therefore deemed more suitable to be applied under the local CESAQ-PUCE laboratory conditions. The validation of method IPN AC-06-00 demonstrated its local applicability. In addition, IPN AC-06-00 can be used by similar laboratories to assess contaminants concentrations and improve the baseline information concerning human exposure to toxic metals.
format	article
author	David Romero-Estévez, Gabriela S. Yánez-Jácome, Karina Simbaña-Farinango, Pamela Y Vélez-Terreros, Hugo Navarrete
author_facet	David Romero-Estévez, Gabriela S. Yánez-Jácome, Karina Simbaña-Farinango, Pamela Y Vélez-Terreros, Hugo Navarrete
author_sort	David Romero-Estévez, Gabriela S. Yánez-Jácome, Karina Simbaña-Farinango, Pamela Y Vélez-Terreros, Hugo Navarrete
title	Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry
title_short	Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry
title_full	Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry
title_fullStr	Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry
title_full_unstemmed	Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry
title_sort	evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by graphite furnace atomic absorption spectrophotometry
publisher	Pontificia Universidad Javeriana
publishDate	2019
url	https://doaj.org/article/57674320845b43de8e480d73f9081f64
work_keys_str_mv	AT davidromeroestevezgabrielasyanezjacomekarinasimbanafarinangopamelayvelezterreroshugonavarrete evaluationoftwosamplepreparationmethodsforthedeterminationofcadmiumnickelandleadinnaturalfoodsbygraphitefurnaceatomicabsorptionspectrophotometry
_version_	1718426302285873152

Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry

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