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Evaluation of Different Sample Preparation Procedures Using Chemometrics: Comparison Among Photo-Fenton Reaction, Microwave Irradiation, and Direct Determination of Minerals in Fruit Juices

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Abstract

In this work, an exploratory study about the mineral characteristic of some fruit juice (passion fruit, pineapple, orange, and grape) applying chemometric tools was made. The juices analyzed were separated in different groups by principal components analysis and hierarchical components analysis in accordance with their minerals contents. Barium, C, Ca, K, Mg, Mn, Na, and Sr were determined by inductively coupled plasma optical emission spectrometry. Addition and recovery methods were used for confirmation of the results. The recovery range for microwave sample preparation was from 81% (for K) to 111% (for Mn), for photo-Fenton from 102% (for Ca e Mg) to 128% (for Na), and the direct analysis, without sample preparation step, from 96% (for K) to 139% (for Mn). A new method based on photo-Fenton reaction coupled with microwave radiation for juice decomposition was proposed; the obtained results were satisfactory and compatible with the conventional methods of analysis in accordance with Student’s statistic t test and chemometric tools.

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Acknowledgments

The authors are grateful to Fundação de Amparo à Pesquisa do Estado de São Paulo (01/07865-0 and 07/04515-4) for the financial support and for the fellowship to CFG and to the Conselho Nacional de Desenvolvimento Científico e Tecnológico for the fellowship provided to RC.

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Authors and Affiliations

  1. Grupo de Análise Instrumental Aplicada, Embrapa Pecuária Sudeste, Rodovia Washington Luiz, Km 234, P.O. Box 339, 13560-970, São Carlos, São Paulo, Brazil

    Caio Fernando Gromboni, Rodolfo Carapelli & Ana Rita Araujo Nogueira

  2. Departamento de Química, Universidade Federal de São Carlos, Rodovia Washington Luiz, Km 235, P.O. Box 676, 13565-905, São Carlos, São Paulo, Brazil

    Caio Fernando Gromboni, Rodolfo Carapelli & Edenir Rodrigues Pereira-Filho

Authors
  1. Caio Fernando Gromboni
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  2. Rodolfo Carapelli
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  3. Edenir Rodrigues Pereira-Filho
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  4. Ana Rita Araujo Nogueira
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Correspondence to Ana Rita Araujo Nogueira.

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Gromboni, C.F., Carapelli, R., Pereira-Filho, E.R. et al. Evaluation of Different Sample Preparation Procedures Using Chemometrics: Comparison Among Photo-Fenton Reaction, Microwave Irradiation, and Direct Determination of Minerals in Fruit Juices. Food Anal. Methods 3, 98–103 (2010). https://doi.org/10.1007/s12161-009-9097-9

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