Experimento utilizando grãos para explorar a calibração em análises químicas

Experimento utilizando grãos para explorar a calibração em análises químicas

Alternative title Experiment using grains to explore calibration in chemical analyses
Author Silvestre, Daniel Menezes Google Scholar
Naozuka, Juliana Autor UNIFESP Google Scholar
Correia, Paulo Rogério Miranda Google Scholar
Nomura, Cassiana Seimi Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Abstract The conventional curriculum of Analytical Chemistry undergraduate courses emphasizes the introduction of techniques, methods and procedures used for instrumental analysis. All these concepts must be integrated into a sound conceptual framework to allow students to make appropriate decisions. Method calibration is one of the most critical parameters that has to be grasped since most analytical techniques depend on it for quantitative analysis. The conceptual understanding of calibration is not trivial for undergraduate students. External calibration is widely discussed during instrumental analysis courses. However, the understanding of the limitations of external calibration to correct some systematic errors is not directly derived from laboratory examples. The conceptual understanding of other calibration methods (standard addition, matrix matching, and internal standard) is imperative. The aim of this work is to present a simple experiment using grains (beans, corn and chickpeas) to explore different types of calibration methods.
Keywords calibration
instrumental analysis
internal standard
standard addition
Language Portuguese
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Date 2014-01-01
Published in Química Nova. Sociedade Brasileira de Química, v. 37, n. 9, p. 1545-1549, 2014.
ISSN 0100-4042 (Sherpa/Romeo, impact factor)
1678-7064 (Sherpa/Romeo, impact factor)
Publisher Sociedade Brasileira de Química
Extent 1545-1549
Origin http://dx.doi.org/10.5935/0100-4042.20140209
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000344472500020
SciELO ID S0100-40422014000900020 (statistics in SciELO)
URI http://repositorio.unifesp.br/handle/11600/8204

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