Multivariate optimization of a method based on slurry sampling for determination of Fe, Mn and Zn in spirulina (Arthrospira sp.) samples

In the present work a novel methodology for the determination of Fe, Mn, and Zn by flame atomic absorption spectrometry in samples of spirulina, commercialized as a food supplement, was developed. Variables involved in the sample preparation were optimized using the Doehlert design and desirability...

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Bibliographic Details
Published in:Journal of food measurement & characterization 2023-10, Vol.17 (5), p.5322-5329
Main Authors: Cerqueira, Uillian Mozart Ferreira Mata, Bezerra, Marcos Almeida, Silva, Bruno Novaes, Novaes, Cleber Galvão, Almeida, Erica Raina Venâncio, Araújo, Sulene Alves
Format: Article
Language:English
Subjects:
Arthrospira
Atomic absorption spectroscopy
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Commercialization
Design optimization
Dietary supplements
Engineering
Food
Food Science
Iron
Laboratories
Manganese
Optimization techniques
Original Paper
Reagents
Sample preparation
Scientific imaging
Slurries
Spectral analysis
Spectrometry
Zinc
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Summary:In the present work a novel methodology for the determination of Fe, Mn, and Zn by flame atomic absorption spectrometry in samples of spirulina, commercialized as a food supplement, was developed. Variables involved in the sample preparation were optimized using the Doehlert design and desirability function. The developed method presented quantification limits of 18, 5.3, and 8.6 mg kg −1 , precision, expressed as repeatability (%RSD, 0.5 mg kg −1 , N = 5) of 1.3; 1.8 and 2.3% respectively for Fe, Mn, and Zn. Accuracy was assessed by addition/recovery test, comparison with another method adopted as standard, and analysis of certified reference materials (Apple leaves NIST1515, and Pinus leaves NIST 1575a), showing that the method presents adequate accuracy for the determination of the elements studied. The concentrations of Fe, Mn, and Zn found were in the ranges from 52.5 to 836; 7.50 to 40.2, and 13.7 to 25.0 mg kg −1 respectively.
ISSN:2193-4126
2193-4134
DOI:10.1007/s11694-023-02034-z