Optimization of a Digestion Method Using Diluted Acid in Bee Pollen Samples for Determination of Fe, Mn, and Zn by Flame Atomic Absorption Spectrometry

Optimization of a Digestion Method Using Diluted Acid in Bee Pollen Samples for Determination of Fe, Mn, and Zn by Flame Atomic Absorption Spectrometry

In this study, the determination of Fe, Mn, and Zn by flame atomic absorption spectrometry (FAAS) was performed in nine bee pollen samples from different cities. The efficiency of acid digestion in bee pollen samples using nitric acid at different concentrations (3.5, 7.0, and 14.0 mol L −1 ) and hy...

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Bibliographic Details
Published in:Food analytical methods Vol. 10; no. 3; pp. 759 - 763
Main Authors: Siqueira, Jean S., Pereira, João B., Lemos, Michelle S., Filho, Heronides A. Dantas, Dantas, Kelly G. Fernandes
Format: Journal Article
Language:English
Published: New York Springer US 01-03-2017
Springer Nature B.V
Subjects:
Absorption spectroscopy
Acid digestion
Analytical Chemistry
Atomic absorption analysis
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Dilution
Evaluation
Food safety
Food Science
Hydrogen peroxide
Manganese
Microbiology
Nitric acid
Optimization
Pollen
Spectrometry
Zinc
Bee pollen
Inorganic elements
FAAS
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Summary:In this study, the determination of Fe, Mn, and Zn by flame atomic absorption spectrometry (FAAS) was performed in nine bee pollen samples from different cities. The efficiency of acid digestion in bee pollen samples using nitric acid at different concentrations (3.5, 7.0, and 14.0 mol L −1 ) and hydrogen peroxide in a microwave oven was evaluated. The proposed procedure using nitric acid diluted to 3.5 mol L −1 was effective for the digestion of all the pollen samples. The samples showed low levels of Fe. However, Mn and Zn were the elements which presented the highest concentrations in the samples. The bee pollen samples studied showed a great Mn and Zn contribution to the recommended daily intake (RDI) of the human diet, contributing with 71.7 and 15.1 %, respectively. The accuracy of the measurements by FAAS was evaluated by adding aliquots of the elements in the digestates. Recoveries obtained ranged from 89 to 106 % for Fe, 94 to 100 % for Mn, and 88 to 108 % for Zn.
ISSN:1936-9751
1936-976X
DOI:10.1007/s12161-016-0625-0