A Solid Film Electrode of Intermetallic Ag2Hg3.02 for the Direct Determination of Folic Acid in Fresh and Processed Fruit Juices |
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| Authors: | Cleide Garcia de Paula Renata Alves de Toledo Carlos Manoel Pedro Vaz Paulo Jorge Marques Cordeiro José Paschoal Batistuti Ieda Aparecida Pastre Hojae Shim Fernando Luís Fertonani |
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| Affiliation: | 1. Instituto de Química, Universidade Estadual Paulista, P.?O. Box 355, 14800‐900, Araraquara‐SP, Brazil;2. Embrapa Instrumenta??o Agropecuária, P.?O. Box 741, 13560‐970, S?o Carlos‐SP, Brazil;3. Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, SAR, P.?R. China;4. Instituto de Química de S?o Carlos, Universidade de S?o Paulo, Av. Trabalhador S?o‐Carlense, 400, P.?O. Box 780, 13560‐970, S?o Carlos‐SP, Brazil;5. Faculdade de Ciências Farmacêuticas, Universidade Eatadual Paulista, P.?O. Box 355, 14800‐900, Araraquara‐SP, Brazil;6. Instituto de Biociências, Letras e Ciências Exatas, Universidade Eatadual Paulista, Rua C. Colombo, 2265, 15054‐000, S?o José do Rio Preto‐SP, Brazil |
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| Abstract: | AgSIE was used for the direct analysis of folic acid (FA), with a detection limit and lower level of quantitation of 6.8×10?10 mol L?1 and 2.3×10?8 mol L?1. The analysis in fresh and processed fruits was done without any sample pretreatment. In strawberry and acerola juices, FA concentration level values were below the method detection limit. FA was detectable in peach (77.7±0.4 µg L?1 and 64.4±0.5 µg L?1), Persian lime (45.4±0.7 µg L?1), pineapple Hawaii (66.2±0.4 µg L?1), pear pineapple (35.3±0.6 µg L?1), cashew (54.4±0.5 µg L?1), passion fruit (73.2±0.3 µg L?1), and apple (84.4±0.5 µg L?1). |
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| Keywords: | Folic acid Fruit juices SWAdSV Intermetallic Ag2Hg3.02 SEM XRD |
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