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Preparation and characterization of the fish reference material; Preparacao e caracterizacao de um material de referencia de peixe

Abstract

The certified reference materials (CRMs) play an important role in obtaining measurement results traceable to the International System of Units, through an unbroken chain of comparisons. Thus, the demand for new certified reference materials (CRMs) increases every day in all areas of knowledge. The availability of reference materials, mainly in Brazil is still incipient, given that the demand far exceeds the available variety of these materials. The amount of certified reference materials available in the country is insufficient to meet the need of the scientific community and demands for development of new methodologies. Among the many areas in need of reference materials, we highlight the importance for the food trade balance for these products within the country. The certification of food products, intended both for export and for domestic consumption, requires analysis methods that provide precise and accurate results to ensure product quality. This paper describes the preparation and certification of a reference material in the fish matrix in mercury and methylmercury. The study brings together since the stage of material selection, preparation, development of homogeneity and stability studies and characterization. The certification was performed by means of measurements using two analytical techniques, flow injection analysis - cold vapor atomic  More>>
Publication Date:
Jul 01, 2011
Product Type:
Thesis/Dissertation
Report Number:
INIS-BR-12712
Resource Relation:
Other Information: Tese (Ph.D.)
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; CALIBRATION STANDARDS; FISHES; FOOD; MASS SPECTRA; MERCURY; METHYLMERCURY; QUALITY CONTROL; SPECTROPHOTOMETRY
OSTI ID:
22138015
Research Organizations:
Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR1300152092755
Availability:
Available from INIS in electronic form
Submitting Site:
BRN
Size:
129 page(s)
Announcement Date:
Oct 10, 2013

Citation Formats

Ulrich, Joao Cristiano. Preparation and characterization of the fish reference material; Preparacao e caracterizacao de um material de referencia de peixe. Brazil: N. p., 2011. Web.
Ulrich, Joao Cristiano. Preparation and characterization of the fish reference material; Preparacao e caracterizacao de um material de referencia de peixe. Brazil.
Ulrich, Joao Cristiano. 2011. "Preparation and characterization of the fish reference material; Preparacao e caracterizacao de um material de referencia de peixe." Brazil.
@misc{etde_22138015,
title = {Preparation and characterization of the fish reference material; Preparacao e caracterizacao de um material de referencia de peixe}
author = {Ulrich, Joao Cristiano}
abstractNote = {The certified reference materials (CRMs) play an important role in obtaining measurement results traceable to the International System of Units, through an unbroken chain of comparisons. Thus, the demand for new certified reference materials (CRMs) increases every day in all areas of knowledge. The availability of reference materials, mainly in Brazil is still incipient, given that the demand far exceeds the available variety of these materials. The amount of certified reference materials available in the country is insufficient to meet the need of the scientific community and demands for development of new methodologies. Among the many areas in need of reference materials, we highlight the importance for the food trade balance for these products within the country. The certification of food products, intended both for export and for domestic consumption, requires analysis methods that provide precise and accurate results to ensure product quality. This paper describes the preparation and certification of a reference material in the fish matrix in mercury and methylmercury. The study brings together since the stage of material selection, preparation, development of homogeneity and stability studies and characterization. The certification was performed by means of measurements using two analytical techniques, flow injection analysis - cold vapor atomic absorption spectrometry (FIA-CV-AAS) and isotope dilution applied to mass spectrometry (IDMS), which is a primary method. In this work the standards of the ISO 30 (ABNT 30-34) and ISO Guide 35 was used as the basis for the preparation and characterization of the material. For the calculation of uncertainties was used the GUM and Eurachem guide. As a result, was produced and certified a lot of material in relation to the concentration of mercury (Hg = 0.271 {+-} 0.057 mg g{sup -1}) and methylmercury (MeHg = 0.245 {+-} 0.038 mg g{sup -1}), and informational values of lead and arsenic. (author)}
place = {Brazil}
year = {2011}
month = {Jul}
}